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 Foundation for German communication and related technologies

(History of Technology)

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Last update:   Saturday, 19 August 2023, on 8.25 CET

A

•  About Navigating on this website 6 (consideration, about us) Status: 1/1/2015
•  About the objectives of our Foundation (About us)    Agenda of the Foundation (Diary)
•  Abshagen Karl-Heinz   ↓ KV 2/388..390: 1+2+3+4+5+6+7       26/2'22!!
•  Abshagen Karl Heinz-2 ↑ KV 2/390-3 ..   8                        2/3'22!!
•  Abwehrfunk-Funkabwehr, Rudolf Staritz's re-issued manuscript of 1985 25/6/'18!
•  Abwehr-2 Bilder aus dem Bereich des Geheimen Funkmeldedienstes.. Rudolf Staritz!
•   Abwehr-3 Heeresneubauamt Stahnsdorf                Status: 13/4'20
•   Abwehr data, collected in a historical succession          Status: 5/7'19
•  Abwurf-Zielfernrohr-Goerz-Boykow   André Masson CH    24/7'23!!
•  A.D.I (K) report transcripts (a selection), known as 'Felkin reports' Status 29/2/2020!!
•  Advances and disadvances of frequency and Phase modulation ... (BIOS Misc. 83)
•  AEG-Kleinzange zum Schweißen und Löten AEG Mitteilungen 9/12 1943 
•  AEG product leaflets 1930s (Handbooks papers and product information)
•  Agenda (diary) of our Foundation, incl. personal reflections! Status: 5/7/2023!!
•  AGFA Colour    (BIOS 397)
•  Agfa Film Factory Wolfen, CIOS Rep. No. XXX-15    (CIOS)
•  Airborne command transmitter (transponder?) module (unidentified type number)
•  Aircraft Works of Koninklijke Maatschappij "De Schelde"  (CIOS IX-5-6-7-XI-22)
•  Akustische Strahlungsleistung von Kreis- und Kugelgruppen(Sonar), F.A. Fischer(ENT)
•  Allied post-war reports on German Science and Industry (FIAT-CIOS-BIOS)(selection)
•  Annalen der Physik (1897 - 1905) all indexes & selection of papers, Planck, Einstein,..
•  Analogcomputer als Medium der Zeitmanipulation, by Teresa Busjahn (Handbooks)
•  Anniversary 10 Years “Fernseh A.G. 1929 - 1939”, Germany (TV tech 1930 - 1945)
•  Antennen, Ausgewählte Fragen über Theorie & Technik 23-26 March 1943, GBN-ZWB
•  Antennen, Ausgewählte Fragen Teil 2, 24 - 26 March 1943 Part 2 GBN-ZWB 2 !!
•  APS 15A (R-78/APS-15A) survey, ≈ the wartime Meddo Gerät technique!! Status:16/12/'14
•  Arbeitsgemeinschaft Rotterdam (AGR), minutes of meeting 1943/44 (History of radar)
•  Arbeitskreistagung Röhren (valves & magnetron - conference) Breslau 27/28 March 1944
•  Archive displays, radar, communications, measurments, transmitter, computer→!!
•  Archives PP, concerning German military and commercial apparatus
•  Artefacts, on display ( selection of exhibits) , and a selection of Archive displays !!
•  Arthur Owens, alias SNOW 1935 - 1941..+6+7+ 8a+8b+8c!+8d ↓ 6/8'21 !!
•  Arthur Owens page 3;  8e+9a+9b+9c+ 9d               7/9'21 !!
•  Arthur Owens page 4: 10a +10b +10c!!!                  30/9'21 !!
•  Artist - Johannes Jebsen a forensic Survey:XVII+XVIII+XIX+XX  2/7'20!!
•  Askania - Bordgeräte Sonderdruck Flugzeugtypenbuch 1937/38
•  Aspects of German Airborne Radar Technology 1942-1945 (airborne radar history)
•  Aspects of German radar calibration (Würzburg - Mainz - Mannheim and Berlin)
•  Aspects of German Work on High Temperature Materials   (BIOS 272)
•  Aspects of precision measurements (in Dutch language)
•  AS 60 repair. Finding out what caused the R line-phase breakdown?
•  Athos, a German passive radar apparatus for U-boats, operating on 9 and 3 cm
•  Ausdehnungs-Thermometer, History of  Expansion Thermometer 1600 - 1848 (ATM)
•  Auswanderungsmesser WW I, Germ. & Swiss FLAK, André Masson ! (CH) 31/10 2017
•  Auxiliary radar (test) instruments (radar-gear)
•  ATM, Archiv für Technisches Messen, papers on scientific measuring techniques
•  Ayesha and SMS Emden The escape of the landing squad from Direction Island 1914!

B

•  Barkhausen-Kurz, retarding field (B-K)valve theory, H.G. Möller (ENT vairous)
•  Ballistische (Ballistic) Galvanometer, Flux, Kriechgalvanometer (ATM Various)
•  Bändchen mikrophon (Ribbon type microphone) Siemens & Halske (ENT various)
•  Bandung area, Tjimindi & Tjililin transmitter sites + Rantja-Ekek receiving station
•  Bandung Radio Laboratory and the inauguration of a monument at Kootwijk 1939
•  Battery service manual: Die Sammler. Maintenance on behalf of GAF (L.Dv.706)
•  Bayerische Motor Werke (BMW)    (CIOS XXVI-83)
•  BCD counters, developed in Germany between 1940 - 1945 (BCD counters)
•  Beck (Horst) selection of pictures of his beautiful collection on radar, gyros, rockets etc.
•  Bedeutung der Frequenz- und Zeitmessung in der Schweizer Luftwaffe (Handbooks)
•  Berlin radar considerations FuG224, Berlin A, FuMO81 (Exhibits details, very down that page!!)
•  Berlin FuG 224 = FuMO81 radar, circuit discription handbook 1944/45 >Exhibits details !!
•  Berlin FuG 224 radar, manual and AGR details 1944 (Manuals)(Handbooks)
•  Berlin Feld II 'Ersatz', completing our endeavour   Status 21/12'16 
•  Berlin FuG 224 radar Survey, integrating new modules N2 + P  Status: 14/11/'16
•  Berlin FuG 224: U 224 Umformer: 28 V dc→80 V ac B+C Status: 25/6'18
•  Bildtelegraphie, Lorenz-Korn system, 2 contributions, 50 years C. Lorenz anniversary
•  Blauschrift-Röhre type LB50, paper on The Skiatron or Dark Trace Tube (Handbooks)
•  BOA12 - MEK8 and MG15, carrier telephone systems, brief description by Helmut Schicke
•  Bolometer-Amplifier, (ATM various)
•  Bombenrechner SAAB BT-9 für Hawker Hunter (Schweiz) By André Masson 8/6'20!
•  Boot & Randall's famous cavity magnetron patents of 1941, US2542966, US2648028
•  Bouw Radio Zendstation Malabar, building the station Radio Malabar 5 Status: 3/7/'14
•  Braun's (Ferdinand) very significant patent on a 'whisker cristal detector' (1906)
•  Breite Quarzregelfilter paper by W. Kautter (Telefunken Zeitung 77, November 1937)
•  Breslau Störsender, Breslau moonshine like jammer Status: 9 December 2013
•  British HF/DF operator recollections, during wartime convoy escorts (Huff Duff)
•  Broadcast stations permitted (authorized) by the Germans 1941 (Abhörverbot!)
•  Brown (patent) Microphone Amplifier, (≈1900-1920)(Archive displays)(exhibits)
•  Bruneval Report, T.R.E.(TRE) 6/R/25, on the Britsih raid of 28 February 1942(transcipt)
•  Busignies' HF/DF system concept used by the Germans known as: R.C. 5 B

C

•  Calit & Calan, Hescho brochure on ceramics, state of the art of 1932/33 (Handbooks)
•  Cambridge A.C. Instruments for High Frequencies, Catalogue 162 of 1925/27
•  Canaris, message decrypts where in his name had been used 1940-44 5 21/8'18
•  Carbonyl Nickel & Carbonyl Iron Powders, their Production & Properties  (BIOS 1575)
•  Carl Bosch Laboratory of Berlin (AEG) (infra-red Bildwanler), (CIOS File No. XXX-35)
•  Carl Zeiss Stiftung, transcript of some interesting pages of CIOS report XXXIII-51
•  Carré Mathilde Lucie @ Victoire French espionage & double cross KV2/926-936 2+3+4 4/2'21!!
•  Carré - Lucas - Brutus (Walenty) & Kiki German/\French double cross  2+3+4a+5+6 24/2'21!!
•  Carré-Bleicher-Walenty & Draht I + 2 + 3-4 + 5 + 6 + 7 + 8   19/4'21 !!
•  CAVMAG 2010, International Conference on 70 Years of the Cavity Magnetron
•  CAVMAG 2010, The Power and the Glory, intriguing story, by Phil Judkins
•  CFQ Quartz-clock, designed by Rohde and Leonardt of Rohde & Schwarz (CFQ)
•  Chapman - Zigzag Safecracker Double-Cross agent 4 + 5 + 6 + 7    3/6'21!!
•  C.H.F. Müller A.G. Bahrenfeld, Hamburg    (BIOS Final Rep. 201)
•  Clausewitz's comments on: the successfulness of the (former) enemy (Huff-Duff)
•  Coaxial Cable & Associated Telephone & Television Systems    (FIAT 286)
•  Commenorance for all WW II and WW I civil and military victims 4/8'19
•  Components display,  since 14 June 2011    Status: 5 February 2012
•  Concealed Oil Targets in the Brilon-Bredelar Area    (BIOS-39)
•  Conducting properties of aluminium at high frequencies (FTM 1936)
•  Cryptographic patents, selection of some quite early patent applications
•  Curious (small) archive displays (>curious archive displays<)
•  Cyclotron Investigation Heidelberg (Prof. Bothe) (CIOS XXIX-47)

D

•  Dajeukolot (Dayeuh Kolot)(Dajeuh Kolot) radio station ≈ 1938 and 1989
•  Dajeuh Kolot wireless station, integral reproduction of a photo album   29/5/'14
•  Das neue Patentgesetz, paper on new German patent-legislation of 1936(Handbooks)
•  DASD-CQ, German radio amateur (Funkamateur) magazine of 1937, call-sign list!add!
•  DASD-CQ, some of 1939/41 and 1944. Proving that >86 'D' HAMs got war-license!!
•  DASD CQ 1943-44, Mai 1943 bis September 1944 + November 1944  18/11'16
•  DASD-Rufzeichenliste Status 25 August 1941 German wartime HAM call-sign list
•  Deckname Wuerzburg (Würzburg) FuSE 62/65 newly scanned    24/12'22!!
•  Der Weg zur Normfrequenz 50 Hz, by Gerhard Neidhöfer, Bulletin SEV/AES, 17/2008
•  Description of Junkers 004 (203) Jet Propulsion Engines (CIOS XI-6-XII-9 and XIV-4)
•  Design of German Telephone Subscribers' Apparatus     (BIOS 606)
•  Design of Radar Test Equipment Siemens Halske Plant Munich    (CIOS XXVII-46)
•  Deutsche Versuchsanstalt f. Luftfahrt (DVL) Institut f. Betriebstoff Forschung (BIOS 119)
•  Deutschlands Rohstoffversorgung, Rede von Walther Rathenau am 20. Dezember 1915
•  Development and Production of Electrical Components, Especially of Relays (BIOS 393)
•  Development of Ceramic Materials for use in Turbine Engines    (CIOS XXV-9)
•  Development (German) of Modulator Valves for Radar Application (BIOS 1746)
•  Die Einheitsröhrenserie, article on the standardisation of valve(tube) base size (FTM)
•  Dielectric wires and waveguides (FTM 1938)
•  Dienstreise Nord I. Report on a trip 26-31/12/'44, Karlshagen to V2 launching site the Hague
•  Diesselhorst Thermokräftefreies Kompensationsapparat 1906-1908 (Zs.f.Instrumk.)
•  Dijkstra's interesting recollections on: Radio-Malabar and his time in Dutch-Indies
•  Dijkstra's (Klaas) price winning photo-album of 1939, unique photos! Status 13/5/2013
•  Dimensioning of Directional Antennas By Dr. Kurt Fränz, Telefunken    (FIAT 610)
•  Dioganes Bunker alignment data of MEK8 and BOA-12 of Bell Telephone Antwerp
•  Diversity reception, Gerät zur Auswahl des lauteren Übertragungsweges (ENT 1932)
•  DK-Classification (Dewey system), Über das Ordnen technischen Schrifttums (ENT)
•  Donnerkeil Unternehmung, Operation Cerberus, Channel Dash 12/2/1942(Handbooks)
•  Doppler patent US1981884, by Taylor, Young and Hyland of 13 June 1933 (Handbook)
•  Dornier Structural Strength Test Equipment and Methods    (BIOS 66)
•  Drueke-Vera von Wedel-Waelti KV 2/1701-1706  Part V VI VII VIIIa, IX extra 24/2'20!
•  Düsseldorf/Aachen talk ‘06, on Hülsmeyer and his early radar commitments, PDF-ppt
•  Dutch Indies PTT, reproduction of photo albums recently donated to the archives 28/6/'14
•  Dutch Report on German Manufacture of scales on metal, glass and celluloid (BIOS misc 101)
•  Dutch Report on Transmitting Tube Targets in Germany  (BIOS Miscellaneous 102)
•  Dynamit A.G. Plant at Trosidorf    (CIOS-XXIV-3)
•  Dynamit A.G. Troisdorf    (CIOS XX-3)

E

•  Ebbe Peedersen's, photos of German communication equipment about 1950 
•  e_km- und h_m-Rechner II am Fu.M.G.39TD (Flak), analogue computer to Wurzburg radar
•   EGON, a German wartime secundairy radar system, up to optical range
•  Electrical and Technical Ceramic Industry of Germany     (FIAT 617)
•  Electro - Accoustics in Germany Part 1 & 2,  (BIOS 980)
•  Electron Microscopy in Germany    (BIOS 1671)
•  Electronic Principles as Applied in Germany to the Testing of Materials (BIOS 724)
•  Electronic Valve (Tube) Factories Helmbrechts and Minden    (CIOS XXIV-26-27)
•  Elefant/See-Elefant radar transmitter, which came into being late December 1943!!
•  Elektrometerröhren, electrometer valve(tube) technology, (ATM various)
•  Elektronenstrahl-Oszillograph (CRT-scope) literature list up to 1939 (ATM various)
•  Elektronenstrahl-Oszillograph, aspects of the history of CRT oscilloscopes (ATM various)
•  Electronic Test Instruments Spark & Flash Discharge Photographic Equip. Philips (CIOS XII-22)
•  Elektrolytischen Trog, die Aufnahme von Potentialbildern, electrolytic bath (FTM)
•  Elster DMG2T, UHF telephone communication set (curious archive displays)
•  Emden the story of the famous raiding cruiser, 1914, by Prince Frans Joseph von Hohenzollern
•  Enigma, aspects of wireless communications during the Battle of the Atlantic
•  Enigma, Naval type M4 for u-boats >1941 (U-Boot Schlüssel M4)(Archive displays)
•  Enigma manual M Dv Nr 32/1, Marine Druckschriftverwaltung Nr 32/1 (Handbooks)
•  Enigma, selection of basic patents & docs on the names of Koch, Scherbius and Korn !!
•  Enigma, schreibende Chiffriermaschine von Arthur Scherbius 1923 (Handbooks)
•  E.N.T. Elektrische Nachrichten-Technik, paper selection (in progress) (ENT various)
•  Erich von Salzmann Chapters 1+2 +3+4+5    all  Combi   4/1'22!!
•  Erich Vermehren about his disgusting case, 2+3+4+5+6a     19/11'21!!
•  Ernst Lecher Institute, research report on radar ECCM technology 1945 (Handbooks)
•  Ernst Sachs' letter to Heinrich Himmler of 31 July 1944, on the use of radio amateurs
•  Erzeugung und Verstärkung von Dezimeter- und Zentimeterwellen H.E. Hollmann (TFT)
•  ES111, Die Ablenkstufe des Fernseh-Gemeinschaftsempfängers E1 (Telefunken-Röhre)
•  Etablissment ORA-Grandin M. CHAUCHAT, Metox    (CIOS I-2)
•  Europe Missed the Transistor, IEEE paper, (Weblinks)
•  European Electron Induction Accelerators US Naval Technical Mission  (BIOS-Misc-77)
•  Exhibits Registration (radar- communication- audio recorder- measurement- apparatus) 3/1/'15
•  Exhibits details new page 1!   Status: 11 October 2022
•  Exhibits special dedicated on to components  Access being renewed !!
•  Exhibits details new, extended page 2   Status: 22 October 2017
•  Exhibits-details new, extended page 3  Status: 12 January 2014 
•  Exhibits-details new, extended page 4  Status: 12 January 2014 !!
•  Exhibits-details new, modified page 5 D (KZ 14 ...) Status: 10/7/ 2013
•  Exhibits-details new, extended page 6 c   Status: 12/4/2014
•  Exhibits-details new, extended page 7 KWE a    Status: 31/3/2014
•  Exhibits-details new, extended page 8, about the Li-SN2 coaxial connector Status: 8/6/'14
•  Exhibits-details new, extended page 9, on Numans  Status: 19/6/'14
•  Exhibits-details new, extended page 10 some old 'spot dB-meters' Status 3/10/'14
•  Exhibits-details 11a Gemse    Status: 16 October 2014
•  Exhibits-details 11b FuPeil-E3    Status: 18 October 2014
•  Exhibits-details 11c PQK 10 & FNR 16 & SK17 (VK17)    Status: 18 October 2014
•  Exhibits-details 11d SK 3 (S 10 K 3)    Status: 16 October 2014
•  Exhibits-details 11e E10K3    Status: 16 October 2014
•  Exhibits-details 11f Schwabenland Ln 21021   Status: 18 October 2014
•  Exhibits-details 14 Abstimmeinsatz a (Abst. a)  2b Status: 13/10/2016 Extended 4
•  Exhibits-details 15 Empfängerprüfer für Torn Fu bf and b1 A Status: 14/12/'15
•  Exhibits-details-17 The Gema OB-Einsatz Freya/Seetakt Lichtzeiger projekt 2, 14/9/'15
•  Exhibits-details- 17a Gema OB 110 cursor projection operates again!  2 19/10/2016
•  Exhibits-details 18 TU 50 (TU50) Fernseh UHF triode to the 'Tonne TV TX'   7/9/'15
•  Exhibits-details 18a  DH 7 The Fernseh AG UHF modulator valve    13/5/'16
•  Exhibits-details 19 'Lokomotiv' transmitter module to Würzburg 62 and 65 16/11/'15
•  Exhibits-details- 20 Fahrzeugrahmen Mounting rack for tank sets Status: 30/12/'15
•  Exhibits-details- 20a The new, more transparent display of our Fu 5 Status: 10/6'17
•  Exhibits-details- 21 Lo6K39 and Lo6L39 mounting provision   16/9/'16
•  Exhibits-details 22 Überlagerer 62, the unique Wurzburg LO module Status 3/10'16
•  Exhibits-details 23 E 102a, coarse altitute radar/receiver-display 2 Status: 21/11'16
•  Exhibits-details 24 Luminous quartz phenomenon demonstrations  Status: 17/5'17
•  Exhibits-details 25 Displaying a Lo6K39 RX open at turning table Status: 18/10'17
•  Exhibits-details 26, I guess, two 1944/45 IF KM radar strips (new)  21/11'17
•  Exhibits-detailes NS 4, discoveries on late Graham Wimbolt's device +B  17/2'18  
•  Exhibts-details a most rare SD spy set (1941-43) C+D  Status:15/3/2018
•  Exhibits-details_29, German wartime IR image convertor  Status: 26/5'18
•  Exhibits-details 30, BZA1, Ju 88 analogue bombing computer B Status 21/12'18! 
•  Exhibits-details 31: FG 1250? Infra-Red apparatus, a Survey A + B  18/5'21!
•  Exhibits-details 32, our FG1250 IR apparatus starts working 1+2+3 11/2'19!
•  Exhibits-details 33, GK III German wartime voice inverter  3 + 4    14/9'20!
•  Exhibits-details-33b, GK IIIb sets are now operating correctly  Test 2, Test 3 16/9'19
•  Exhibits-details-33c, GK IIIb scrambler on Secret Comms 3 display 2  25/10'19
•  Exhibits-details 33d, Spectrum screen shots scramble vs unscramble  4/11'19 
•  Exhibits-details 34, DLL 22T the transmitter valve of the SE 109/3 spy set 13/5'19
•  Exh-details 35: GK IIIb scrambler communicating through Tfb2 16/3'20
•  Exhibits-details-36, Radione RS 20M and R3 restoration 1 2      7/5'20
•  Exhibits-details-36a, Radione R 3 RX restoration     2      16/6'20!!
•  Exhibits-details-36b, Radione R 3 tuning alignment Hans Goulooze 23/6'20!!
•  Exhibits-details-37                                        1/10'20
•  Exhibits-details 38, 6400 Grad Karten und Flak-Meßschablone   4/5'21
•  Exhib-det-39,  Askania Kinotheodolit, Kth 41; 2+3+4 +5+6! 29/4'22!!          
•  Exhib-details-40,   LMS_10, the German magnetron strapping,      6/10'21!
•  Exh-details-41, S&H-KGW2c Wellenmesser ca. 1915           4/3'22 !!
•  Exh-details-42, Unknown Kriegsmarine audio DF   2+3+4+5+6+7    28/6'22!!
•  Exh-details-43,  DMG 5k Michael 2                         10/2'23!!
•  Exhibits new (situation priviously), Klooster exhibition!  Status: 24 May 2013
•  Exhibits thoughts, the relevance of quasi 'stand alone' devices  Status: 7/8/2013
•  Exhibits, of late Graham Winbolt's remaining devices 1 Status: 25/10/2013
•  Exhibits, of late Graham Winbolt: Zeitdrucker 38, page 2    Status: 25/10/2013
•  Exhibits, of late Graham Winbolt: Hypsometer, page 3    Status: 17/9/2014
•  Exhibits, many of our artefacts being displayed differently 33 Status: 14/6/2016
•  Exhibits newly reshuffled after Secret Communications 2         Status 8/2'17
•  Exhibits and Foundation Promo Film kindly made by Theo Faber 8/1/2018
•  Exhibits reshuffled again December '22 1+2+2a+3+4        14/2'23!!    
•  Expo-Art-Techno exhibition in our museum in conjunction with the local Counsel 25/10'22!!
•  Explosives summary of Capacity and Production in Germany    (CIOS XXXII-38)      

•  Fachvorträge über Schiffsfunkortung beim Oberkommando der Kriegsmarine (Radar)
•  Fading past and memories, about Mr van Oosten, Dijkstra and Poulsen transmitter
•  Fading wartime sounds, recordered 1943 at the British Y-station Southwold A Status: 5/4'16
•  Felix Transmitter a story on  Sittig, the Nazi spy in South Africa  13/3'19
•  Felkin report transcriptions, A.D.I. (K)    Status: 9/12/2013
•  Ferdinand Braun's CRT (Cathode Ray Tube) paper of 1897 (Ann.d.Physik)
•  Ferdinand Braun's Nobel (Prize) lecture, held on 11 December 1909 (Handbooks)
•  Fernseh AG (GmbH) Hausmitteilungen (research & development papers) (TV-tech)
•  FIAT-CIOS-BIOS rep, Allied investigation on German technology, Status: 14/10/2019
•  Fischer's (F.A.) paper on artificial beam forming, he was famous in sonar (ENT various)
•  Flensburg, FuG227, secundary radar aiming at the British Monica radars (Manuals)
•  FM broadcasting, future aspects (Method Armstrong)(Radio Mentor 1939/1941)
•  Focke - Achgelis Rotary Wing Kite (FA-330)(Achelis?)    (FIAT 176)
•  Forschungsstelle Langeveld, intercepting strategic telephone US/UK 2 + 3 2/10'20!
•  Franke Kompensationsapparat (Potentiometer)(Zs.f.Instrumentenkunde 1904)
•  Franz Mayr Case ↓ very intriguing .mp4 series 1+2+3!+4+5!!+6   6/4'22!!
•  Franz Mayr Case ↑ Considering his diary: 7a+7b+7c+ 7d+7e+7f stop 29/4'22!! 
•  Frequency & very accurate time measurements by the Swiss Air Force (Hans Jucker)
•  FTM, Funktechnische Monatshefte (in progress) (FTM various)
•  Fu 5, Die Antennenanpassung der Panzerfunkanlagen, Theoretische Analyse ....!!
•  FuBl 3F + FuBL2 project + YouTube demonstrations X+Y+YB+Yc Status: 22/6 '18
•  FuBl blind-landing Survey came to a closure, with 2 YouTube films, Status: 8/10'18
•  FuBl-Ebl-project by Hans Goulooze, lasting just over 2 years + YouYube films 18/3/19
•  FuG 03 Stuttgart receiver module displayed with DMG5K Michael RX 2d Status: 12/6/'15
•  FuG 25a, German airborne target identification transponder Erstling by H.Jucker
•  Fullep-Fuellop, the Hungarian Secret Service source & K-H Kraemer case   9/3'20
•  Funkpeilung als alliierte Waffe gegen deutsche U-Boote 1939-1945 PDF 22/9'20!! 
•  FuMB26 "Tunis" EW radar search receiver (Cuba Ia and Mücke). (Handbooks)
•  Funkhöhenmesser FuG101a mit Frequenzmodulation, by Hans Jucker (Handbooks)
•  Fuses, Electric Protection, Fine-sensitive and surge-resisting types ...  (BIOS 1771)

•  Jagdhaus high power radar    (FIAT 609) 
•  Jagdschloß (Jagdschloss) radar FuG 404, New photos !! + A Status 8/11/'15!
•  Jagschloss: Kreuzeck receiver & system Survey 4!+5!  Status: 7/9/15!
•  Jagdschloss transmitter stage codename "Eibsee"
•  Jakobs (Jacobs) Josef, German Spy dropped on 30 Jan. 1941 near Ramsey 10/2'20
•  Japanese Wurzburg (Würzburg) copy 1944/45, It is known they got one but a photo?
•  Johann Philipp Reis, 1834-1874-1934, the inventor of the (word) "Telephone" (ENT)
•  Joyce William, 'Lord Haw-Haw'   ↓  British1+2 KV 2/245           9/7'22!!
•  Joyce William, 'Lord Haw-Haw' 2 ↕  British 1+2+3 KV 2/246     23/7'22!!
•  Joyce William, 'Lord Haw-Haw' 3 ↕  British +2+3+4 KV 2/247-KV2/249 2/8'22!!
•  Joyce William, 'Lord Haw-Haw'-4↑   British 1+2 KV 2/250          11/8'22!!
•  JUMO 205 C Baureihe 4, the unique diesel aircraft engine    (Manuals)

•  K 12 Kurssteuerung, gyro to the mini-submarine type 127 (Seehund) Status 18/5/'15
•  K 12 adapted for the Seehund midgit submarine starts operating again 3c Status 4/6/'15
•  Kathodenstrahlroehre by Manfred von Ardenne's 1933 book (integrally)  16/12'20
•  Kathodophon microphone, ENT paper January 1929 (ENT various)
•  Kennelly (Arthur Edwin) 70 years (by K.W. Wagner)(ENT various)
•  Keramische Spezialmassen, special ceramic compounds Handreck, Hescho 1935 (ATM)
•  Keyword and subject group wizard   Status: 9 May 2017 
•  Klatt and Ostro queries on names and code-names,  2/8'16
•  KLATT-OSTRO-JOSEPHINE lecture lasting 2:47 in mp4 video New Status: 9/3'20
•  Klein-Heidelberg, a parasitic radar system, which techniques has been recovered! !
•  Klein Heidelberg-a WW2 bistatic radar system that was decades ahead of its time K-H, Hugh Griffiths
•  Klooster exhibits, to be opened only by those having fast internet access! 
•  Knickebein receiver FuG28a, receiver of Crooked Leg system, exhibits, archive displays
•  Koeln E 52 transcriptions to patents and applications Auszuege 
•  Koeln E52 photos of the famous 1941 proto-type Luft-Bodenprogramm 
•  Köln E52 Eichmaschine, an automatic photographical scale calibration apparatus
•  Köln E52 (koeln) main subject page
•  Koeln E 52 restoration project. Why are we doing it? 
•  Koeln E 52 recalibrating its microfilm scale professionally
•  Kommandogeraet 40, L.Dv. T 1352/1 Flak predictor! Analogue data computing
•  Kompensations-Apparate für Gleichspannung (ATM various)
•  Kootwijk catalogue of the November 2000 event on aspects of precision measurements
•  Kootwijk, aspecten van precisiemetingen, year 2000; 4 new Films mp4   24/2'21!!
•  Kootwijk-Radio archives, its remaining paper and photographic documents, up to 2001
•  Kootwijk pictures, taken by Klaas Dijkstra in 1927
•  Korfu, radar search receiver, introduced very late 1944 or early 1945(archive displays)
•  Kraemer Karl-Heinz, KV 2/144 ↓ 1+2 + 3                        8/1'23!!
•  Kraemer Karl-Heinz, KV 2/145 ↕ KV 2/146 4+5+6+7+8        21/1'23!!
•  Kraemer Karl-Heinz, KV 2/147  ↕ 9+10+11+12+13+14+15     20/2'23!!
•  Kraemer Karl-Heinz, KV 2/149 ↕ 16+17+18+19+20+21+22  13/3'23!!
•  Kraemer Karl-Heinz, KV 2/151 ↕ 23+24+25+26           29/3'23!!
•  Kraemer Karl-Heinz, KV 2/153 ↕ 27+28+29+30+32+33+34   15/5'23!!
•  Kraemer Karl-Heinz, KV 2/156 ↑ 35+36+37+38+39+40+41  5/6'23!!
•  Krawinkel image-storing cathode ray tube    (FIAT 1027)
•  Kriegstagebuch-Chef-TLR (KTB)  genuine KTB copy 
•  Kriegstagebuch - Chef-TLR, reissued by Florian Eibensteiner   31 October 2017
•  Krupps, Essen incorporating info on Luftfahrtgeraetewerke Hakenfeld(e) (BIOS 286)
•  Kuebart Wilhelm Obstlt. KV 2/410 Ausland/Abwehr I Berlin, Part I  II  26/8'19
•  Kurier U-boat's, misterious, fast wireless signal system (1944/45)
•  Kurvenflug Rechner by André Masson 
•  KV 2/393 - KV 2/394 on von Hentig my extracts; a selection 2/7'18
•  KV 2/757-KV 2/768 Trompke Werz case, German espionage in South-Africa 21/11'18!
•  KV 2/266 - KV 2/159, Obst ↓ Rudolph & Count Ledebur's Cases    8/10'18!
•  KV 2/267on Dr, Erich Pheiffer's ↑ Case, most extensive file Status: 6/5'19 !
•  KV 2/3573 & KV 2/2654 Reith & Recke Cases in North Africa 14/11/'18!
•  KV 2/2294 the "Passim" the sailing missions to South Africa & South America 19/5'20!
•  KV 2/2639  Kraizizek Walter - South-Afrika, PDF                22/8'22!!                   
•  KV 2/283, Vice Consul Dr. Hermann Goeritz in Tanger, RSS intercepts 3/12'18!
•  KV 1500-1501+1503, Rote Kapelle and 20 July '44 attempt aspects 27/12'18!
•  KV 2/1971 Sonderkommando Pannwitz, on "Rote Kapelle" & "Kent"  27/12'18!
•  KV 2/2068 Sukolov ment is: Fritz Kent, real name Anatoly Markovich Gurevich  7/1'19
•  KV 2/2074 Trepper the "Grand Chef" in wartime Belgium and France 14/1'19
•  KV 2/1487-1490+KV 2/89: Wolf, Becker & Utzinger, espionage in Argentina 2 15/4'19
•  KV 2/1722-1724 Hellmuth Osmar Alberto an Argentinean, versus MI5&MI6 22/4'19
•  KV 2/3015 Gambke, Raupach and Peters  Abwehr related stories   5   14/11'19
•  KV 2/3409, Zuelsdorff  Part I +II spin-off the Gimpel&Colepaugh case 1/9'20 !!
•  KV 2/3409.mp4 a new .mp 4 explaining verbally what it is about 26/10'20!!
•  KV 2/467 Goldschmidt @ Peasant, the notional spy 1+2+3+4+ 5+5a  17/11'22!!
•  KV 2/196 Fidrmuc Paul (alias Ostro)↓ 2+3+4+5!+6!+7+8+9+10  8/7'23!!
•  KV 2/198 Fidrmuc Paul (alias Ostro) ↕11+12+13+14+15+16   29/7'23!!
•  KV 2/199 Fidrmuc Paul (alias Ostro) ↑+18+19!+20!+21!+22!  19/8'23!!

M

•  Na-stock number list, Kriegsmarine Nachrichtenmittel, Geräteliste Status:7/5/2017
•  Na- stock-list, Kriegsmarine Nachrichtenmittel, test gear of the German Navy 1944
•  Wanted support in tracing consignment numbers CT serials 
•  Nachtfee (FuG136) a survey finding out how the EGON-B system worked Date 18/7/2012!!
•  Nachtfee survey page 2, discovering its hidden secrets and technology Status 21/12/2011
•  Nachtfee survey page 3, bringing it to function again and finding out how it works Status 22/11/2011
•  Nachtfee survey page 3a, superseding page 3, owing to a new phase of our project 5/1/2012
•  Nachtfee survey page 4, investigating the quartz controlled module, MLK Lab. Status 22/11/2011
•  Nachtfee discussion page, created on 2 January 2012     Status 6/1/2012
•  Nachtfee is beginning to function as it was supposed to operate! Status: 5/3/2012
•  Nachtfee survey evaluation and conclusion report    Status 23 June 2012
•  Nachtfee, searching for the means how its data was conveyed    Status: 11/4/2012
•  Nachtfee, FuG25a IFF system setup, simulating the FuG136 data chain 23/6/2012
•  Nachtfee, about Freya-EGON in combination with Nachtfee    Status 15/4/2012
•  Nachtfee, Hans Jucker's objection against the way I have reconstructed the system Status 18/5/12
•  Nachtfee, new additional discoveries from a British wartime report Status 14/5/2012
•  Nachtfee, getting a 1000 Hz tuningfork to provide 500 Hz (tuneable) Status: 8/6/2012
•  Nachtfee, considerations, explaining new hypotheses differently!! Status: 27/8/2012!!
•  Nachtfee, Quartz reference matters, recent investigation    Status: 7/7/2012
•  Nachtfee Chronology, reflecting all we know in a time line Status: 28 July 2012
•  Nachtfee, things to be accomplished in September 2012 and up Status: 28/9/2012!!
•  Nachtfee, our progress showed in PowerPoint (PDF)  Status: 22 August 2012
•  Nachtfee, things done 1- 21/a!!!!, since early September 2012 Status: 24/12/ 2012
•  Nachtfee, things done 2- 27!!!! continuing things done 1, Status: 29/3/2013
•  Nachtfee, experiments on YouTube 1 - 15, 16 - 24, 25 - 32, 33 - 37+ 71-76  Status: 4/3/2012
•  Nachtfee, in the 'Domain of Time' 1- 2    Status: 21/11/2012
•  Nachtfee, explaining its final principle a bit differently ppt/PDF  26/11/2012
•  Nachtfee, a failing system concept? !new findings! 1- 3/a  Status: 8 December 2012!!
•  Nachtfee, bits and pieces 7, dealing with various subjects  Status: 8/February 2013
•  Nachtfee, explaining it textually and a mixture of drawings and YouTube films 18/2/2013
•  Nachtfee new thoughts, experimetally replacing transistors by valves Status: 10/8/2013
•  Nachtfee new thoughts accomplishing 12c, building and testing its circuitry Status: 4/10/2013
•  Nachtfee new thoughts, showing the final project results on YouTube Status: 25/10/2013
•  Nachtfee a once in a lifetime survey, PDF version of my November 2013 talk Status 17/11/2013
•  Nachtfee, a seemingly never ending Saga, 5b new information+!Status: 14/10/2014
•  Nachtfee, why can't we access the missing links, before closing the subject? 24/7/14!!!
•  Nachtfee, an attempt to explain its principle elaborately, (brainstorming 3) 11/12/14!!
•  Nachtfee, experiments with a Rb-standard a quasi absolute reference +D+E+F+G Status:11/4/'16
•  Nachtfee Siminar, Deo volente, lectures & demos, status: 8/7'17  25/11 2017
•  Nachtfee Seminar'17 leaflet and PowerPoint animation   12/7'17
•  Nachtfee a Confrontation (eine Auseinandersetzung)+5***+6      5/9'17
•  Nachtfee Seminar held on 25th November 2017,  A + B Status: 3/12'17
•  Nachtfee Seminar'17 Lecture on PDF    Status: 3/12/2017
•  Nachtfee Seminar lecture film, mp4 of 25th November '17, re-recorded  8/3'18
•  Nachtfee eine (meine) große Entdeckungsreise  V5               21/12'20!!
•  Nachtfee my exceptional Survey-V6 A PowerPoint presentation in .mp4 28/12'20!!
•  Nachtfee revival Survey     A + B + C +D + E+F          24/9'21 !!
•  Nachtfee-↓-aircraft-display-reconstruction, +2+3+4+5+6+7+8+9+10+11+12 21/4'22!!
•  Nachtfee-↕-aircraft-display-reconstruction + 13+14+15+16          3/9'22!!
•  Nachtfee-↑-airdisplay-right-hand-side-new  +18+19+20+21+22   17/10'22!!
•  Nachtfee acryl air display substitute 1+2+3                       3/7'23!!
•  Navigational aids (including the German "Beams" against Britain)
•  Navigational Beam System "Elektra - Sonne"    (FIAT 1105)    22 January 2013!!
•  Naxos, a German mobile radar direction finder (Manuals)
•  Naxos being operated and shown on YouTube films 97-101   Status: 11/4/2013
•  Neumann Kondensator-Flasche concern (Neumann condensor-microphone) Status: 22/11/2014
•  Norddeutsche Seekabelwerke Nordenhaus    (Bios 297)
•  Nordpol affair & Englandspiel related file documents+2a+3 Status: 6/5'19
•  Notlandung eines B-17 mit APS-15 an Bord, in der Schweiz (History of radar)
•  NTM, Mitteilungen aus dem Gebiet des Marinenachrichtenwesens Heft 6 Nov.1943 !!
•  NVK, German Naval Communications Research Establishment (1920 - 1945)
•  NVK research, German recollection on Electronic Warfare Technologies  26/5'18

•  Open Museum day on 21 November 2015
•  Open Museum day photo series, taken on 21st November 2015 Status 1/2'16
•  Open Museum Day sheduled for 6 May 2023  Flyer (PDF)     6/5'23!!
•  Open museum day photos taken on 6th May 2023              14/5'23!!
•  Operation Atlas, Kurt Wieland's KV 400-402 Palestine10'44 II Status: 10/9'18
•  Optical Activities at Steinheil u. Söhne München    (BIOS-40)
•  Organisation of Deutsche Versuchsanstalt für Luftfahrt (DVL) (BIOS Final Rep. 200) 
•  Oslo report of November 1939, Hans Ferdinand Mayer and R.V. Jones (Handbooks)
•  Ott Differential Analyser    (BIOS 412)
•  Owens Arthur alias Snow 1935...1945+ 2+3+4+5+6+7+8a+8b+8c!+8d ↓ 2/8'21!!
•  Owens Arthur alias Snow webpage 3:  8e + 9a + 9b + 9c +9d     7/9'21!!
•  Owens Arthur alias Snow webpage 4: 10a + 10b + 10c!!!          30/9'21 !!

•  PA 0 AOB, Hell-mode QSO, with a historical wartime station, ≈ 70 years old !!
•  Patent-Auszüge, about German patent abridgements 1928 -1945, made 1946/48!! 
•  Patent selection, of interesting German patent numbers, (Patents DE) 30/11/2012 
•  PDF documents, how to approach it for keywords effectively
•  Pentode (a) for the Battle Front in Three Days replacing S&H C3e tube by WE in 1944!!
•  Phased array basics, brief introduction, by Hans Jucker (Handbooks)
•  Philips valve type "LV9" a true fore-runner of the Rimlock valve series  9/9'22!!
•  Philips wartime espionage reports passed onto British Authorities 1944/45
•  Philips Valvo Works, Hamburg Hammerwerke Minden, C.H. Müller Hbg. (BIOS 65)
•  Philips Works at Eindhoven, Cios visit on 23-26 September 1944 (by R. Watson-Watt)
•  Photosurfaces, report on German photocells, electr.multipliers & TV pick-up (BIOS 530)
•  Physik und Technik der ultrakurzen Wellen H.E. Hollmann Bnd 1 & Bnd 2 Status 28/2'15
•  Physikalisch-Technische Reichsanstalt (PTR), CIOS Report No. XXX-36 (FIAT-CIOS-BIOS)
•  Piezo-electric phenomenon being made visible. Highly exceptional demonstration 10/4/'14!
•  Plastic and Wooden Parts in German Aircraft    (CIOS XXXI-8)
•  Platinum Metals Industry in Germany    (BIOS 441)
•  Poulsen transmitter at Radio Malabar, (pictures originating from Dijkstra's archive)
•  Praun, Albert: "German Radio Intelligence, Army Office of Military History, 1950 7/12'20!
•  Precision time measurements in Germany prior to 1950 by means of quartz crystals
•  Pressure Gauges, activities & Products of the Firm J.C. Eckhardt     (BIOS1109)
•  Primary Cells by Prof. A. Schmid    (BIOS 413)
•  Processing of Polyvinyl Chloride Invest. of German Plastic Plants (BIOS 445) Corrections!  
•  Product information on, Siemens & Halske, Hartmann & Braun, Steatit-Magnesia
•  Production of Dornier D.O. 24 Flying Boat    (CIOS XII-5)
•  Production of Hydrazine Hydrate I.G. Farben A.G. Leverkusen Germany! (CIOS XXII-18)
•  Production of Luminous Compounds at the Works of Auer Gesellschaft A.G. (BIOS 303)
•  Production Statistics German Steel Industry 1943 and 1944    (CIOS XXVIII-54)
•  Progress in the Time and Radio Frequency Measurments at the PTR Heidelberg (FIAT895)
•  Prüffeld-Prüfvorschrift DB/P Prüffeld-Leitung to Berlin radar type FuG224 receiver
•  PTE (now Rohde & Schwarz) product catalogue 1938
•  PTR quartz-clock, designed by Giebe and Scheibe of the German Bureau of Standards
•  Puck, testing whether Naxos is sensitive enough, making one myself Status: 28/5/13
•  Pulverised Magnesium        (CIOS XXVI-25)

Q

•  Quadded Toll Cables    (FIAT 287) 
•  Quatz crystals made by Dutch PTT in the 1950s and 1960s (Alblas Collection)(Archives)
•  Quarzuhren (Quartz clocks), 4 papers by A. Scheibe of the German PTR (ATM various)
•  Quecksilberthermometer PTR, Mercury precison (Hg) thermometer, (ATM various)
•  Queries T-Force party photos (likely) 1+2                    17/10'22!!

R

•  R.A.E. Farnborough 'Rad' series, of former Cas Casper's archive  Status: 1/2/'16 
•  Radar and Electronics Targets Cologne and Vicinity    (CIOS XVIII-3)
•  Radiotelegrafie in Nederlandsch-Indië 1916 Part I + II + III     4/6'21!! 
•  Radio Valve and Lamp Industry in Vienna    (BIOS 248) 
•  Radar, 100 Years, about Christian Hülsmeyer's inventions 1903/1904(history of radar)
•  Radar and Controlled Missiles (the latter is not found in France Sept.1944) (CIOS I-1)
•  Radar experiments on 4.7 cm, Doppler and puls techniques in the US by GE (FTM 1937)
•  Radar history, Vorgesch. 1. Generation Frühwarn - Radar bis ca. 1960 H.Jucker (8 MB)
•  Radio Malabar, volume 1 until 1928, Klaas Dijkstra's famous book in E-reader format
•  Radar News 19, (Funkmessnachrichten 19) of 25.2.1945, British post war translation!!!
•  Radar, RCM versus Wurzburg(Würzburg), transcription of U.S. wartime publications
•  Radar, who invented it? A survey on Christian Hülsmeyer (Huelsmeyer) and others
•  Radio Luxemburg effect, Cross-Modulation phenomena (FTM)
•  Radio Mentor, selection of papers on: TV, FM broadcasting, microphone .. (1939/44)!!
•  Radio Sonde Transmitters    (CIOS XXVIII-20) 
•  Radiotelegraphisches Praktikum by Rein-Wirtz (1921) > 558 pages
•  Rationalization of future German Radio Industry 1939 (Radio Mentor)
•  Rauh KV 2/409 Obstlt. Johann Gottlieb Ii Funkleiter Alst Paris   14/7'20
•  Rehbock, an ingenious German range calibrator  (Auxiliary Radar test-gear)
•  Reisz Mikrophon (Reiss microphone) (curious archive displays)
•  Reis telephone of about 1861-1865, the microphone and its sound reproducing gear
•  Refractories in Turbine Blades, CIOS File XXXI-22    (CIOS)
•  Rel.mse.2030a circuit description "Rel beschr 755a", audio spectrum analyzer 1935/36
•  Reparatiedag (German apparatus repair-day) held on 12 November 2011 (Klooster)
•  Report on a trip to the V2 (=A4) launching site, The Hague in Holland, December 1944
•  Report on the Firm of Carl Zeiss, Jena (also on the Carl Zeiss Stiftung) (CIOS XXXIII-51)
•  Research and Development of Impulsive Ducts in Germany V-1 engine! (BIOS 1777)
•  Research work undertaken by German Universities and Technical High Schools (CIOS XXXI-2)!
•  Resotank Type HB14, article Zs f.Hochfr.&Elektroakustik June 1943 (Handbooks)
•  Rhodos Impulsmesser R&S 1943/44 explained by some photos 3/8'23!!
•  Ritter Maj. - Dr. Rantzau Nikolaus Adolf Fritz (I L) Ast Hamburg 1937-41 19/2'20
•  Rohde & Schwarz (PTE) Preisliste of 1941, briefly a products list of 1949
•  Rote Drei, communist espionage network against Germany I, II, III Status: 22/7'19
•  Rote Drei, Rudolf Roessler @ "Lucie" supplying OKW internal information 22/ 7'19
•  Rudi's Corner, dedicated to the concerns of my late very best friend   18/10'21!!
•  Rudi's rare books corner: Figl 1; Türkel 2;               12/10'21!!
•  Rudi's official documents,                               18/10'21!!
•  Rudi's conversations, 1+2+3+4+5+6+7+8+9+10+10a+11*+12+14+14b 1/12'21!!
•  Rudi's Stasi file  1+2+3!+4+5+6+7+8                    30/5'22!!
•  Rufzeichenliste German 'Funkamateure 1937', 'Funkliebhabersender' (DASD-CQ 1937)
•  Rukop's paper on Telefunken valves (tubes)(selection) (Handbooks and papers)
•  Runge Wilhelm T., letter to Fritz Trenkle 1983 (contribution to the history of radar)

S

•  S.A.F. 10 Jahre Selen Trockengleichrichter Süddeutsche Apparate-Fabrik 1938
•  Salaam-Condor, Eppler & Sandstede, László Almásy,1942 Part1a+2 +3 NEW 1/4'19
•  Salaam-Kondor-(Condor)-mp4  Lázló Almásy's exp. Salaam-Kondor  25/7'20
•  Scharf Hans-Karl, KV 2/207-209; Abwehr W/T operator!1+2+3   31/1'22!!
•  Schellenberg Survey, British interrogations of '45 Part_II + Part_III   28/5'19
•  Schering-Messbrücken (Schering Bridge) (ATM various)
•  Schering Vibrationsgalvanometer mit elektr.magn. Abstimmung (Handbooks)
•  Schlüssel M4 Begleitpapiere, of Naval Enigma No.15835, which never reached Kiel
•  Schlüssel M4 famous German 4 rotor Enigma & text-printer Schreibmax (Archive displays)
•  Schluesselregeln fuer die Wehrmacht 1 April 1944 concerning Enigma & G-Schreiber ..
•  Schornsteinfeger project, allied report on aspect of German Stealth technology 1944/45
•  Schreibmax MZSE and power supply MZSS survey 'NIX' simple printer! (Exhibits details)
•  Schulze Case, the Anton Group in Persian tribe territory! 1943-March 44 28/5'18
•  Schwabenland receiver repair Survey  A+ C+D Status: 27/1'18
•  Secret Communications 2 announcement! BC 12/11-19/11 & 3/12 2016 Status: 12/9'16
•  Secret Comms 2-1, Tatjana's Enigma like machine on 12/11and 3/12 '16,  1/11'16
•  Secret-Comms 2-2, building up our exhibition further  Status: 7 November 2016 
•  Secret Comms-2- First open day held on 12 November 2016
•  Secret Communications 2, added Veltman's photos  2  3rd December 2017
•  Secret Communications 2 photos by Gerard Vos of 3 December 2017  24/12/'16
•  Secret Communications 2, photo series on behalf of Tom van Eijck   1/2/'17 
•  Secret Communications 2 extra open day on 14 January 2017
•  Secret Communications 2 last open day 14 January 2017, photos by Mark Kohn
•  Secret Communications (old), 5   exhibition in November 2013  Status: 20/12/2013!!!
•  Secret Communications, building up the exhibition on YouTube   Status: 27/10/2013
•  Secret communications exhibition, impression of visitors on 23 November 2013
•  Secret Communications, announcement, Sunday 15 December 2013 we are open!
•  Secret Communications exhibition, brief visitors impression 30 November 2013
•  Secret Communications, why do we promote such an event?
•  Secret comms, Mr Schoemaker, on the 'Dutch Stay-Behind' (Gladio) organisation O&I!!
•  Secret Communications 3 preliminary Announcement 1     10/4'19!!
•  Secret Communications 3 Flyer-2 introduction 2            20/5'19
•  Secret Communications 3, what will be put on display?    28/5'19!
•  Secret-Communications 3, new Displays      2       25/10'19!
•  Secret-Communications 3, photo's taken during the opening on 16 Nov '19   18/11'19!
•  Secret-Communications-3,photos taken 16-nov.2019 by Gerard Vos  26/11'19!
•  Secret-communications-3, taken 23-nov.2019 by AOB    15/1'20!
•  Secret-Communications 3-photos taken by AOB on 7 December 2019   10/12'19
•  Secret-Communications-3-photos by AOB on 21 December 2019   24/12'19
•  Secret-Comms-3 photos by AOB 12^th January 2020, last exhibition day  15/1'20
•  Secret Communications 4 announcement for Autumn exh. 2023!!
•  Secret Communications 4 introduction brochure PDF         24/7'23 !!
•  Seeburg Tisch, ingenious air defence operation table, a Survey! 3+3B Status: 1/12/2015
•  Seefliegerhorst Wesermünde (Evacuation from Erpr.St. Lw. Karlshagen) (CIOS XXVI-3)
•  Seekabel (Die) 1909, history of telegraph sea-cables + Deutsch-Niederländisches Kabel !
•  Seeloewe 1 ↓failed German espionage attempts against England 1940  20/11/'19 !
•  Seeloewe 2 ↑ failed Geman espionage attempts on England,  Final    8/11'19 !
•  Seetakt radar modules, employing TS1 and TS1a valves + module TU106 (TS6) (Gema)
•  Selenium Rectifiers S.A.F. Nürnberg. Inst. f. Anorg. und phys. Chem.Darmstadt (CIOS XXVIII-38)
•  Selecting a new logo, please help us with making a choice. Status: 22/8/2011
•  Siemens condenser microphone type SM7a (Radio Mentor)+(Siemens Zs. 1940)
•  Siemens-Hell-Schreiber TFT Bd30 Heft 2, 1941 (new)
•  Siemens & Halske  Fernsprech-Fernkabel 1929 Paris - Tours - Bordeaux
•  Siemens Nachrichtentechnik 1931- 1932 -1933-1934-1936 -1939-1940 - 1941  Status: 1/1'21!!
•  Siemens Sikatrop capacitors, from a so-called: Sonderdruck Nachrichtentechnik 1939
•  Siemens & Halske Hauptuhr type HU 20/48 min a survey Status: 8/9 April 2015
•  Siemens & Halske telephone measuring catalogue 1940 (selection)(Siemens cat. 1940)
•  Siemens & Halske Teleprinter, T-Typ 68 (T 68)     (FIAT 908)
•  Siemens & Halske, classical pre-war components (in progress)(Handbooks leaflets)
•  S&H Veröffentlichungen aus dem Gebiete der Nachrichtentechnik 1932 5.Folge
•  S&H Veroeffentlichungen aus dem Gebiete der Nachrichtentechnik 1941 2. Folge 22/6'18
•  Siemens-LGW Kurssteuerung, das Regelprinzip, Kü4 and K12 gyro system (Handbooks)
•  Siemens (1943) Niederfrequenz-Verstärker-Einrichtungen für Fernsprech u Rundfunk ..
•  Siemens Symbols, Aus der Geschichte des Hauses S & H, 40 Jahre S&H Zeichen
•  Siemens-Übermikroskop, Borries' and Ruska's Electron-Microscope apparatus (1940)
•  Siemens-Verdan system for telex error corrections on wireless links (Handbooks)
•  SIGESO files!! Most interesting docs!!. To be continued in due course Status: 21/3/2013!!!
•  SIGESO transcriptions page     Status: 12 August 2013
•  Six papers on Television    (FIAT 865)
•  Skoda works, Pilsen, Czecho-Slovakia    (BIOS-43)
•  Sloted tube catapult operated by T and Z Stoff for launching the flying bomb (V1) (BIOS 469)
•  Some aspects of ONS 5, the convoy that changed the Battle of the Atlantic (Huff Duff)
•  Some aspects of the history of radar, 1910 up to 1937 (Radar II)
•  Some German Aircraft Armament Projects with part.ref.to Fire Control Devel.(BIOS163)
•  Sonar, U-boat's Gruppenhorchgerät (GHG) (Group listening apparatus)
•  Sound Recording, Reproducing and other Electro-Acoustic Targets    (BIOS 1176)
•  Spare Parts and Provisioning in the G.A.F. (Luftwaffe Bauteile) (CIOS XXXI-69) additional
•  Spiegel-Galvanometer Kipp&Zonen Delft Holland, Zernike, Moll-Dyck (ATM various)
•  Stassfurt Rundfunk Stassfurt (CIOS XXXII-88)
•  Statistics: Interrog. of Dr. Wagenführ of the Planungsamt, Speer's Ministry (BIOS 17)
•  Steg (Steeg) surplus catalogue of 1958, a very impressing source of information!!
•  Steimle Eugen, KV 2/966  1+2+3                             6/9'22 !!
•  Stegskopf talk, training bright young boys of the year '26' to become experts in radar
•  Stenzel's paper on: bearing patterns of grouped radiators (ENT various)
•  Stereophon Sound recording System Developed by Dr. Carlheinz Becker (CIOS XXVI-46)
•  Sternmodulator als Doppelgegentaktmodulator (alternative to a ringmodulator)(TFT)
•  Structural Work at Focke - Wulf, Bad Eilson    (BIOS 285)
•  Subject details (about us)
•  Subject reference dBase (pdf), our quick facts and data source finder Status:17/9/2018
•  Steeg and Reuter (Messrs) Bad Homburg    (CIOS XXV-13)
•  Studien über Aufgaben der Fernsprechtechnik, Max Langer of S&H, 1936
•  Survey of German Research and Development Work on Titanium    (BIOS 1179)
•  Synthetic Rubber Plant Chemische Werke-Hüls    (CIOS XXII-21)
•  Synthetic Rubber Plant Buna Werke-Schkopau A.G.    (CIOS XXII-22)

T

•  Theory of the Reflex Klystron, by Dr. Herbert Doering    (FIAT 1182) 
•  TME 11-219, Allied wartime report on German radar (Handbooks)(History of Radar)
•  T200FK39, very exceptional designed long distant u-boat transmitter (U-Boot-Sender)
•  Telecommunications and Equipment in Germany during the period 1939-1945 (BIOS)!!
•  Telefunken 25 Jahre Commemorating that 25 years ago the company was founded 
•  Telefunken Cathode Ray tube laboratories and Leuchtstoffe, phosphor .. (CIOS XXXII-95)
•  Telefunken data sheets on commercial products 1933-1941 (Handbooks)
•  Telefunken exclusively owned by AEG, Siemens swopped his 50% share (Radio Mentor)
•  Telefunken-Intercontinental SSB telephone technology            2/10'20!!
•  Telefunken Metal/Ceramic Valves (BIOS Final Report No. 30)
•  Telefunken Mikrofone aus: Funktechnik in Briefen (1938) (Handbooks and papers)
•  Telefunken product catalogue of 1919, dealing from 1903 up to 1919. Extremely rare!!
•  Telefunken transmitter valves (tubes) "RS data sheets", 1920-1939 (Kootwijk archives)
•  Telefunken low and medium power valves (tubes), RV, RL, RG, RGQ and RSQ series
•  Telefunken Special Materials for Radio Valves    (BIOS 276)
•  Telefunkenröhren (valves) Verwendungshinweise, application theory
•  Telefunken Zeitung papers 1934, on Magnetron, + Siemens-Verdan error corrections
•  Television Development and Application in Germany (BIOS 867)
•  Television in France    (CIOS XI-1)
•  Test Gear for Frequency Modulation and Television    (BIOS 1269)
•  TFb2 Survey, field carrier-telephony working+YouTube  E+F+G +H+K Status 10/6'17
•  TFT Telegraphen-,Fernsprech- und Funk-Technik 1936-1944 article selections
•  The uses of zinc in Germany (partly)    (BIOS 1159) 
•  Theory of magnetic recording (steel disc and wire) magnetische Tonaufzeichnung(ENT)
•  Thyratron, The Evolution of Hydrogen Thyratron (Handbooks)
•  TICOM MS P 038 German Radio Intelligenge by Lt-General Praun     30/11'20
•  Titanium Pigments, Titangesellschaft G.m.b.H. Leverkusen     (BIOS 451)
•  Tonschreiber b, (taperecorder type b, 1944) post war investigation report
•  Tonverwerfung und Springen eines Schwingaudions beim Durchstimmen .. (Handbooks)
•  Transmission and Reception of Centimeter Radio Waves, US radar techniques 1936!!
•  Trochelmann (Heinz), archive documents on Würzburg & Freya related technologies
•  Turbine Engine Activity at Ernst Heinkel Aktiengesellschaft    (CIOS XXIII-14)
•  TV (Fernsehn) reserach (R&D) commenced in Germany 1938 - 1942 (TV technology)
•  TV receiver type E 1 (E1), introduction and circuit despription (Radio Mentor 1939/41)
•  TV set (Fernseh-Empfänger) type E1 (E 1), comprehensive paper of 1939 (TFT 1939)
•  TV 441 lines standard of Germany 1938, Fernseh-Standard für 441 Zeilen (TFT 1938)
•  Typex analysis by the German OKH/In 7/VI, with some success!   9/11'20