Foundation for German communication and related technologies

(History of Technology)

Subjects: (red = recent contribution(s), change(s) and/or update)

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Last update: 21 May 2013, on 10.45 CET

A

•  About Navigating on this website (consideration, about us) Status: 15/2/2013
•  About the objectives of our Foundation (About us)    Agenda of the Foundation (Diary)
•  A.D.I (k) report transcripts (a selection), known as the 'Felkin reports' Status 25/3/2013!!!
•  AEG product leaflets 1930s (Handbooks papers and product information)
•  Agenda (diary) of our Foundation, incl. personal reflections! →  Status: 21/4/2013!!!
•  AGFA Colour    (BIOS 397)
•  Agfa Film Factory Wolfen, CIOS Rep. No. XXX-15    (CIOS)
•  Airborne command transmitter (transponder?) module (unidentified type number)
•  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
•  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 !!
•  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)
•  Athos, a German passive radar apparatus for U-boats, operating on 9 and 3 cm
•  Ausdehnungs-Thermometer, History of  Expansion Thermometer 1600 - 1848 (ATM)
•  Auxiliary radar (test) instruments (radar-gear)
•  ATM, Archiv für Technisches Messen, papers on scientific measuring techniques

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)
•  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)
•  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)
•  Boot & Randall's famous cavity magnetron patents of 1941, US2542966, US2648028
•  Braun's (Ferdinand) very significant patent on a 'whisker cristal detector' (1906)
•  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)

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
•  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
•  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)
•  C.H.F. Müller A.G. Bahrenfeld, Hamburg    (BIOS Final Rep. 201)
•  Clausewitz's comments on: the successfulness of the (former) enemy (Huff-Duff)
•  Components display, new since 14 June 2011    Status: 5 February 2012
•  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
•  Das neue Patentgesetz, paper on new German patent-legislation of 1936(Handbooks)
•  DASD-CQ, German radio amateur (Funkamateur) magazine of 1937, call-sign list!!
•  DASD-CQ, some of 1939/41 and 1944. Proving that >86 'D' HAMs got war-license!!
•  Der Weg zur Normfrequenz 50 Hz, by Gerhard Neidhöfer, Bulletin SEV/AES, 17/2008
•  Desig 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)
•  Development and Production of Electrical Components, Especially of Relays (BIOS 393)
•  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)
•  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
•  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)
•  Düsseldorf/Aachen talk ‘06, on Hülsmeyer and his early radar commitments, PDF-ppt

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
•  Electrical and Technical Ceramic Industry of Germany     (FIAT 617)
•  Electro - Accoustics in Germany Part 1 & 2,  (BIOS 980)
•  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)
•  Elektrolytischen Trog, die Aufnahme von Potentialbildern, electrolytic bath (FTM)
•  Elster DMG2T, UHF telephone communication set (curious archive displays)
•  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)
•  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)
•  Europe Missed the Transistor, IEEE paper, (Weblinks)
•  Exhibits (radar- communication- audio recorder- measurement- apparatus)
•  Exhibits details new page 1! →  Status: 20 October 2011
•  Exhibits details new, extended page 2 →  Status: 22 July 2011
•  Exhibits-details new, extended page 3 → Status: 3 November 2011 
•  Exhibits-details new, extended page 4 → Status: 23 July 2012 !!
•  Exhibits-details new, extended page 5 B → Status: 21 April 2013!!
•  Exhibits new, Klooster exhibition! → Status: 3 September 2012

F

•  Fachvorträge über Schiffsfunkortung beim Oberkommando der Kriegsmarine (Radar)
•  Fading past and memories, about Mr van Oosten, Dijkstra and Poulsen transmitter
•  Felkin report transcriptions, A.D.I. (k)    Status: 25/3/2013
•  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: 9/3/2013
•  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)
•  Franke Kompensationsapparat (Potentiometer)(Zs.f.Instrumentenkunde 1904)
•  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 ....!!
•  FuG 25a, German airborne target identification transponder Erstling by H.Jucker
•  FuMB26 "Tunis" EW radar search receiver (Cuba Ia and Mücke). (Handbooks)
•  Funkhöhenmesser FuG101a mit Frequenzmodulation, by Hans Jucker (Handbooks)

G

•  G-Schreiber T52d (SFM T52d), (Handbooks papers and product information)
•  GAS Turbine Development by B.M.W. (BMW)    (CIOS XXVI-30)
•  G-Schreiber Fernschreibanschlussgeraet manual and related docs 2, 21/3/2013
•  Geheimschreiber Siemens T52d Repair project 9!! Making it operational again 5/4/2013
•  Geheimschreiber Rep, YouTube films 47 - 48+50 - 56+62-70+77-79+80-85+86-87 19/3/2013
•  Gema X-Gerät, control set of the Seetakt radar, used by German wartime navy (KM)
•  German Aircraft Industry    (CIOS 254)
•  German Aircraft Paints      (BIOS 365)
•  German Camera Industry    (CIOS 184)
•  German Carbon Electrode Manufacture at Griesheim (I.G.F.)    (BIOS 338)
•  German Cold Cathode Tubes Siemens Reiniger Werke Rudolfstadt (CIOS XXXI-50)
•  German Die-Casting Plants    (CIOS XXVII-76)
•  German Electronic Engineering in the 1930s (synopsis)
•  German Fluorescent Lamp Industry and Phospor Chemical Manufacture (BIOS 395)
•  German Graphitising Furnances at Meitingen (Siemens Plania)    (BIOS 337)
•  German Infra Red Driving and Fire Control Equipment (BIOS miscellaneous report 66)
•  German Landing Gear, Design and testing    (BIOS 251)
•  German military Army and Navy wireless communications (some aspects of 1930-1945)
•  German Primary Battery Industry    (BIOS 362)
•  German Radar during WW II (World War Two), (Exhibits, Displays and Subject details)
•  German Secundary Batteries (Special Ref. to those used by Army Signals) (BIOS 307)
•  German Wartime Struggle to catch up with Allied Power Magnetron Technology (1943-45)
•  German Wireless Communication, mainly with reference to: Cm, Dm and Pulse Technique (BIOS551)
•  Giant Wurzburg G, FuMG65 G, 'Würzburg Riese' combined with Freya apparatus
•  Gleichwellenrundfunk, synchronous-wave broadcasting, 3 papers (C. Lorenz)(ENT)
•  Gleichwellenfunk & gegenseitigen Modulationsbeeinflussung (Luxemburg-effect)(TFT)
•  Glossary of some German names for chemical products CIOS XXVIII-62 (CIOS)!!
•  Goliath, a 1 MW tuneable VLF transmitter, used for U-boat communications 1943/45
•  Großpeil- und Empfangsanlage Wullenwever Type HF 2076, wide-base HF/DF !!!
•  Grundlagen und Bedeutung der modernen Telegraphieverbindung (Telex) (FTM)
•  Gruppenhorch-Anlage Baumuster AN301 m,n Sonar, OKM July 1944 Anlagen 1-8
•  Gundelach CRT and special valve (tube) catalogue (Handbooks and papers)
•  Gyro system principles of Siemens-LGW and Patin, 1944, Bericht Nr.7 (Handbooks)

H

•  Handbooks, papers, manuals and product information Status: 11/12/2012
•  Heegner (Kurt), aspects of his series resonance quartz oscillator patents
•  Hell technische Mitteilung, Entwicklungen (R&D)1929-1939, Rudolf Hell (Handbooks)
•  Heinrich Mannheim’s son Günther Mannheim, query: who knows about him? (Radar I)
•  Hermann Göring Steel Works, Paul Pleiger Hütte, Stahlwerke Braunschweig CIOS XXIX 30
•  Hescho ceramic capacitor catalogue, 1938 (Handbooks and papers)
•  Hescho product guide, very interesting product information (Hescho guide 1939)
•  H.F. Band Radars, paper on historical aspects of 'over the horizon' radars by H. Jucker
•  HF/DF versus U-boat wireless communications (Huff-Duff)
•  H.F. Instruments & Measuring Techniques    (BIOS 1228)
•  High Power Radar Jagdhaus    (FIAT 609)
•  High Speed Tunnels and other Research in Germany        (CIOS XXVIII-47)
•  Highly sensitive D.C. controlling & measuring device (FIAT Final Report No. 954)
•  Hisentroll and Hisenvert, German apparatus, a British paper of 1946 (Handbooks)
•  History of televison, prior to 1937, Entwicklung des Fernsehens (Fernsehen&Tonfilm)
•  Hochfrequenz-Fachleute für die Luftwaffe, call for HF-electronic engineers of 1943
•  Hoelzer's talk on the design of the analog computer of the V2 (A4) rocket (Handbooks)
•  Hohentwiel FuG200, aspects of transmitter circuit design, Hans Jucker(Handbooks)
•  Hollerith machines, utilised by Speer's Ministry and for military statistics (BIOS 273)
•  Hollmann's interesting book on UHF technologies (1936), Righi, Mesny.. (Handsbooks) 
•  Hülsmeyer and the early days of radar inventions, sense and nonsense (Radar I)
•  Hülsmeyer memorial tablet, and a photograph of those whom contributed (Radar I)
•  Hülsmeyer's (Huelsmeyer) radio interview on 50 Years of Radar, 1954 (Radar I)
•  Hülsmeyer's coherer receiver of ≈1904/1905, replica (copy)(Archive displays)
•  Hydrogen Peroxide Works of Otto Schickert & Co. at Bad Lauterberg & .. (BIOS 294)

I

•  Institut für Physikalische Forschung Neu Drossenfeld    (CIOS XXVIII-41)
•  Interrogations & Reports on German Methods of Statistical Reporting (BIOS 273)!!!
•  Interrogation of Helmut Gottrup*  Dipl.Ing. Elektromechanische Werke (CIOS XXXI-71) 
•  Interrogation of Prof. Scherzer of the BHF    (CIOS File No. XXXII-87)
•  Investigation into the design and performance of the Volkswagen (partly) (BIOS 998)

J

•  Jagdhaus high power radar    (FIAT 609) 
•  Jagdschloß (Jagdschloss) radar FuG 404, technical trainings manual (Handbooks)
•  Jagdschloss transmitter stage codename "Eibsee"
•  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)

K

•  Kathodophon microphone, ENT paper January 1929 (ENT various)
•  Kennelly (Arthur Edwin) 70 years (by K.W. Wagner)(ENT various)
•  Keramische Spezialmassen, special ceramic compounds, H.Handreck (Hescho '35)(ATM)
•  Keyword and subject group wizard   Status: 11 May 2013
•  Kipp (P.J.) en Zonen (Delft NL)    (BIOS 415)
•  Knickebein receiver FuG28a, receiver of Crooked Leg system, exhibits, archive displays
•  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!
•  Köln E52, patent transcriptions on releated patent applications (Patent-Auszüge)
•  Köln E52, photos of the famous 1941 Telefunken "Luftboden-Programm" catalogue
•  Köln E52 Eichmaschine, an automatic photographical scale calibration apparatus
•  Köln E52 (koeln) main subject page (Köln E52 history)
•  Köln E52 receiver, how to re-calibrate its frequency scale professionally? (Köln E52)
•  Köln E 52 restoration project, Why do we need to restore Köln receivers? (Köln E52)
•  Kompensations-Apparate für Gleichspannung (ATM various)
•  Kootwijk catalogue of the November 2000 event on aspects of precision measurements
•  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)
•  Kriegstagebuch-Chef-TLR (KTB) Chef technische Luftrüstung, war diary Dec.'44-April'45
•  Krupps, Essen incorporating info on Luftfahrtgeraetewerke Hakenfeld(e) (BIOS 286)
•  Kurier U-boat's, misterious, fast wireless signal system (1944/45)

L

•  Landsberg-Tagungsberichte, conference papers on "Navigation", HF/DF, (Handbooks)
•  LD20 reflex klystron and small magnetron, report by Dr. Bürck of Telefunken lab. EL5
•  Leichtmetalle als Austausch-Werkstoffe, paper on "Autarkie"(autarky) 1939 (ATM)
•  Lichtenstein radars FuG202 & FuG220 SN2, Hans Jucker (Handbooks and papers)
•  Lichtenstein Li-SN2 (FuG220) testing panel & antenna → (polarisation/antenna switch)
•  Light Metal Production and Development for Aircraft I.G.Farbenindustrie.. (CIOS XXVI-60)
•  LMS10 vs CV64, TRE report on the parameters of the German magnetron copy of 1945!!
•  Lorenz A.G. (C. Lorenz AG) (CIOS XXV-12)
•  Lorenz 50 Jahre, fifty years anniversary of the C. Lorenz Company
•  Lorenz, applications on VHF and UHF, fifty years anniversay of C. Lorenz Company   
•  Luftboden-Empf-Programm, Telefunken's revolutionary receiver E 52 (Handbooks)
•  Luftfahrtforschungsanstalt Hermann Göring Volckenrode, Brunswick    (BIOS 160)
•  Luftfahrtröhren, German Air Force valves(tubes), including some commenced projects
•  Luftwaffe Signal School Köthen        (CIOS XXVI-85)
•  Luftwaffe wartime instruction film on ECM and ECCM versus Allied EW (Bomber Command)
•  Luminous quartz crystal photographs

M

•  M1K (=AS60), a magnificent Telefunken transmitter of 1943 (exhibits)(archive displays)
•  Magnesium Alloys, Production & Fabrication, I.G. Farben at Bitterfeld (CIOS XXIX-3)!!
•  Magnetic flux-deviation detector of a naval-mine 1939/45(Archive displays&Exhibits details)
•  Magnetophon Project 3, making our AEG K8 operational again  Status: 21/3/2013
•  Magnetophon, selection of relevant patents    Status: 21/4/2013
•  Magnetophon Sound Recording and Reproduction System, AEG/RRG (BIOS 915) (new)
•  Magnetron cavity strapping, from Hans-Joachim Fischer's book of 1956 (Handbooks)
•  Magnetron cavity, have Randall and Boot really invented the cavity principle?
•  Magnetron split-anode type, Runge's paper of 1934 (Telefunken Zeitung '34)
•  Magnetron cold strapping gear?  !!
•  Magnetron, F.F.O. report on their magnetron design ("Arbeitskreistagung" March'44)
•  Magnetron strapping technology (Handbooks&papers)(LMS10 versus CV64)
•  Magnetron strapping invented by Mr J. Sayers in 1941 patent US2546870
•  Mahle Hot Chamber Pressure Die Casting Machine    (FIAT 1153)
•  Malabar Radio, Telefunken-Zeitung paper of October 1925 (Handbooks)
•  Manuals, selection of German military "Handbücher" Status: 21 May 2013
•  Manufacture of Metallized Paper Capacitor Units, Robert Bosch, Stuttgart (CIOS XXVII-44) 
•  Max-A and Max-P, an advanced DF homing system (Blaupunkt 1944/45)(Handbooks)
•  M.Dv.Nr 35, manual to G-Schreiber T52d (Geheimschreiber)+OKM NWa 1785/44 gKdos
•  Meddo-Bericht, German scientific report on the US 3 cm airborne radar AN/APS15, '44
•  Metox Saga, U-boat's radar warning receiver (Huff Duff)
•  Military (telephone) line communications, deployed by the Germans, prior to 1945
•  Minutes of a meeting held at Karlshagen (Peenemünde) on 4/12/1944 (gKdos2120/44)
•  Miscellaneous chemicals I.G. Farbenindudtrie (polyethylene = Lupolen H)(CIOS XXVII-85)
•  Miscellaneous Electrical Factories in the British and American Zones    (BIOS 411)
•  Miscellaneous German Radio and Communication Targets (BIOS 153)
•  Mischgerät (Mischgeraet), the analog computer of the V 2, (exhibits and displays)
•  Mitteilungen über RV-Gerät, Periodical on UHF telephone link techniques 1944 Nr.1 - 14
•  Mücke WSE 2, Wetter-Sonde, Verfahren-Fledermaus, meteorological data transponder

N

•  Na- stock-list, Kriegsmarine Nachrichtenmittel, test gear of the German Navy 1944
•  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
•  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
•  Norddeutsche Seekabelwerke Nordenhaus    (Bios 297) 
•  Notlandung eines B-17 mit APS-15 an Bord, in der Schweiz (History of radar)
•  NVK, German Naval Communications Research Establishment (1920 - 1945)

O

•  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)

P

•  PA 0 AOB, Hell-mode QSO, with a historical HAM station, wartime ≈ 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
•  Phased array basics, brief introduction, by Hans Jucker (Handbooks)
•  Philips wartime espionage reports passed onto British Authorities 1944/45
•  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)
•  Physikalisch-Technische Reichsanstalt (PTR), CIOS Report No. XXX-36 (FIAT-CIOS-BIOS)
•  Plastic and Wooden Parts in German Aircraft    (CIOS XXXI-8)
•  Poulsen transmitter at Radio Malabar, (pictures originating from Dijkstra's archive)
•  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)
•  Product information on, Siemens & Halske, Hartmann & Braun, Steatit-Magnesia
•  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
•  Pulverised Magnesium        (CIOS XXVI-25)

Q

•  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)

R

•  Radio Valve and Lamp Industry in Vienna    (BIOS 248) 
•  Radar, 100 Years, about Christian Hülsmeyer's inventions 1903/1904(history of radar)
•  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)
•  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)
•  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 work undertaken by German Universities and Technical High Schools (CIOS XXXI-2)!
•  Resotank Type HB14, article Zs f.Hochfr.&Elektroakustik June 1943 (Handbooks)
•  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

•  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)
•  Seefliegerhorst Wesermünde (Evacuation from Erpr.St. Lw. Karlshagen) (CIOS XXVI-3)
•  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 & Halske telephone measuring catalogue 1940 (selection)(Siemens cat. 1940)
•  Siemens & Halske, classical pre-war components (in progress)(Handbooks leaflets)
•  Siemens-LGW Kurssteuerung, das Regelprinzip, Kü4 and K12 gyro system (Handbooks)
•  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: 10 May 2013
•  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)
•  Spare Parts and Provisioning in the G.A.F. (Luftwaffe Bauteile) (CIOS XXXI-69)
•  Spiegel-Galvanometer Kipp&Zonen Delft Holland, Zernike, Moll-Dyck (ATM various)
•  Steg (Steeg) surplus catalogue of 1958, a very impressing source of information!!
•  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: 4/12/2011
•  Survey of German Research and Development Work on Titanium    (BIOS 1179)

•  X-Ray Industry in Germany        (CIOS XXVIII-31)
•  X-Ray Crystallography in Germany & Austria, with spec.ref.to mineralogy (BIOS 1004)