Model: "Köln" E52 (E 52) / T8K44 (T 8 K 44)



Old radios, englishAlte Radios, deutschRadios antiguas, españolMusée de radio, francaisRadio antiche, italiano Antique radios, Old Time Radios

"Köln" E52 (E 52) / T8K44 (T 8 K 44)
Country: Germany Manufacturer/Brand: Telefunken Deutschland (TFK)
Year: 1942 – 1945 Type: Communication Receiver (also Amateur)Receiver used for civil commercial purposes, e.g. point-to-point maritime or aviation communications, used or second hand sets often used by radio amateurs. Often used also for military communications, partly special variants to military specifications. Mod.-ID = 70834 previous | Result List | next | New search for Radios etc. Schematics etc.: 0 (for members) Principle Superhet with RF-stage; IF-Freq. 1000 kHz; 2 AF-stage(s)Superhet with a preamplification stage.
Please use «To add informations to model» if you know more! Thanks.
Récepteur TSF superhétérodyne avec préamplification de HF.
Superhet mit HF-Vorstufe.
Tuned circuits 14 AM circuit(s);
Wave bands Broadcast plus more than 2 Short Wave bands.Bei der KW kann es sich um einen Gesamtbereich plus gespreizte Bänder oder um mehrere Bänder ohne Gesamtbereich handeln.
Power type and voltage Line AND Batteries (any type) / 12/110-220 VoltLine supply as well as battery supply possible.
Alimentation secteur et alimentation de batterie possible.
Netz- und Batteriespeisung möglich.
Das Gerät - meist ein Reiseapparat - lässt sich aus dem Netz oder aus Batterien speisen, wobei es sich um Akkus oder Batterien handeln kann. Grosse Reiseempfänger ab Mitte 50er Jahre können einen im Gerät aufladbaren NiCd-Akku enthalten, der nun auslaufen kann
Loudspeaker/pwr.out - This set has no built-in loudspeaker (separate or not necessary).This set has no built-in loudspeaker. It requires a separate loudspeaker or headset - or the set has no speaker output (not a radio).
Cet appareil n`a pas d`haut-parleur.
Das Gerät verfügt nicht über einen eingebauten Lautsprecher - entweder weil er nicht nötig ist (Gerät hat keine Tonwiedergabe) oder weil er separat zu stellen ist - bzw. das Gerät ist für Kopfhörerbetrieb.
www.radiomuseum.org Model: "Köln" E52 (E 52) / T8K44 (T 8 K 44) Material Metal caseMetal case.
Caisse en métal.
Gerät, dessen Gehäuse aus Metall gefertigt ist. Es kann sich um verschiedenartige Metalle und Oberflächenbearbeitungen handeln. Ist es hingegen nur ein Chassis, so erhält das Gerät eine andere Bezeichnung.
Shape Tablemodel, low profile (big size).
Dimensions (WHD) 445 x 245 x 350 mm / 17.5 x 9.6 x 13.8 inch
Valves / Tubes 12: RV12P2000Wehrmachtsröhre. Nichtregelbare Pentode, auch P2000 genannt. Kurz nach dem Krieg oft in zivilen Radios eingesetzt.     (more for members)
Notes 1500 - 25000 kHz in 5 Bereichen, AM/CW mit BFO, regelbares ZF-Quarzfilter, Projektionsskala. Variante "a" mit Motorabstimmung, "b" ohne. Stückzahl ca. 6000, für deutsche Wehrmacht. Wurde auch von anderen Firmen gebaut. Später Verwendung in staatlichen Stellen und Amateurfunk. Zubehör: Seitenband-Auswahlgerät (EB1/3a 9Funk üstr 144K1), Peilzusatz (FuPeil A70k).
Net weight 41 kg / 1446.2 oz
Collectors prices 2 Collector prices (for members)
Mentioned in Fritz Trenkle, Die deutschen Funknachrichtenanlagen bis 1945, Band 2
Literature/Schematics -- Original-techn. papers.Die Daten stammen aus technischen Unterlagen des Herstellers - aus der Zeit der Herstellung.
   
This model was suggested by Anonymous 1 Collector.
Mit freundlicher Genehmigung vom ALGRA - Funkarchiv, K.-H. Allermann (DK6AL), Grafhorst. More pictures  
Further information on

"Köln" E52 (E 52) / T8K44 (T 8 K 44) (Telefunken Deutschland (TFK))

telefunken: E52 (E 52) / T8K44 (T 8 K 44); 'Köln'  (25.12.2006)  Bo SamuelssonHits: 711     Replies: 3 TELEFUNKEN E52 KÖLN OVERVIEW History: Empfänger 52 was specified by the Reichsluftfahrtministerium (RLM) in 1939 as one in a series of five similar receivers covering the entire frequency spectrum from LF to UHF, intended for use in the Luftwaffe ground stations, but also for other services and authorities. A request for quotation went out to a few German electronics manufacturers and Telefunken developed and built a prototype of the short wave receiver Köln in the beginning of 1941. Telefunken was chosen to manufacture the series of receivers according to their specification ”Luftboden-Empf.-Programm 2 – 7500 m für die Bodenausrüstung der deutschen Luftwaffe”, Telefunken Berlin-Zehlendorf  5.5.1941. Out of four specified receivers E51 Leipzig (LF), E52 Köln (HF), E53 Ulm (VHF) and E54 Kulm (UHF) only Köln was built in large series. In total around 2500 receivers were built from July 1942 to March 1945. The E52 was made in 10 models, of which the E52a-1 (simplified with automatic tuning) and E52b-2 (simplified with manual tuning and unified scale) were the most common. Of all the E52s built there are probably 300 - 500 left, of these perhaps 50 in there original state. The receiver is modularised, the modules are mounted in a moulded aluminium chassis and all connections between the modules are through connectors in a backplane! Both the construction and the performance were far ahead of its time. Only one type of valve, the RV12P2000, was used in the receiver except for the power rectifiers. The intention was that all modules and valves should be interchangable in the field without the need for realignment. The first test series of around 20 receivers was made in Sachsenwerk in Radeberg from July 1942 of the simplified type E52a-1 and possibly also the type E52b-1. The manufacture was not up to speed until the beginning of 1943. The assembly and alignment was made in Sachsenwerk Niedersedlitz while the modules were made in several different electronics industries. Receiver data: The receiver is an advanced single superheterodyne with two RF stages, mixer/local oscillator, three IF stages, detector/BFO/AF amplifier and an output stage for headphones. In total there are 6 tuned circuits in the RF/mixer/oscillator part and the receiver has very high sensitivity and selectivity. The IF stages have a 6-circuit filter plus 4 tunable circuits in a variable crystal filter, the bandwith is variable from +/- 5 kHz down to +/- 200 Hz @-3dB with very steep slopes, damping 100 times at +/- 10 kHz in wide. The tuning has a coarse scale and a fine scale projected from a micro photo disc with very high resolution and accuracy. The oscillator has very accurate temperature compensation and thus high stability. Frequency coverage is 1.5 to 25 Mhz in five bands, the sensitivity for AM 3 - 5 uV, CW wide 1.0 uV and CW narrow 0.3 uV for 5 V output. Mirror frequency damping is at least 50000 and the IF damping is better than 100000 at 1.5 MHz. The stability is better than 30x 10E-6/degree C, that is 30 Hz/MHz/degree C for a freerunning oscillator! Even today this is competitive against many modern receivers comparing sensitivity, selectivity and stability. Variants: Type             Ln-number                  Remarks E52a            21000                         Motorised tuning E52b            21000-1                      Manual tuning
More... telefunken: E52 (E 52) / T8K44 (T 8 K 44); 'Köln'  (23.12.2006)  Bo SamuelssonHits: 254     Replies: 0 I bought an E52a-1 Köln from a colleague around 1960.  As I was young and foolish I repainted it and "modernised" some of the modules with miniature valves like 6AK5 and 6X8. After that the receiver did not work well, probably due to bad alignment of the tuning condenser. Now I am a lot older and hopefully wiser and I have restored the E52 to a state as close to the original as possible.  The receiver was far ahead of its time with very high sensitivity (2 RF and 3 IF stages), selectivity (2 crystal controlled variable bandwith stages +-200 to +- 5000 Hz) and stability (carefully temperature compensated circuits). The design was using interchangeable modules, a wiring backplane and the same valve throughout the receiver stages, RV12P2000. There was also a very accurate projected dial for the tuning. I have attached pictures of my receiver before and after restoration. It is now working very well on three of the bands. In step two  I will restore the remaining 2 bands. More details and pictures in my web pages at http://goto.glocalnet.net/bosradio  .  
Some random examples of other models (radios) - click name to see details - green camera symbol = photo(s):  
rmXorg-08 About Radiomuseum.org | Contact | Press | Privacy | Copyright | Logos | send2friend 13JunX