[Boatanchors] German WWII Siemens K32 GWB Tubes, new readable

[Ulrich N Fierz]

Goood afternoon
My apologies: I did not realize how my post would be mutilated and made almost unreadable. Here a better version:


Please allow me to add my 5c of wisdom to this topic from Europe/Switzerland:


The quoted link shows a radio and a circuit diagram labelled "Umbau" i.e. Modification. This was due to the unavailability of the original battery tubes. These are listed correctly in the visible table which comes from radiomuseum.org (see www.radiomuseum.org/r/siemens_k32gwb.html ) and these are


DCH11 (heptode mixer and triode oscillator)

DF11 (pentode)

DAF11 (pentode and diode)

DL11 (power pentode)
These are all battery tubes with 1.2V @ 75mA, datasheets are e.g. on Frank's Electron Tube Data Sheets. They are of the German steel tube construction, some of them rather unobtainium.
UY11 (rectifier diode) for series heating @ 100mA is used when operating from mains power.



Note that the radiomuseum site also has circuit diagrams, description (parts are English!) etc. You can get limited diagrams without having to become a member.


 
What the modification shown on the diagram did, was to replace the battery tubes with 6.3V standard German steel radio tubes - with one exception: the audio power amp. The 4SH1L is actually a  4Ж1Л  Russian tube with a loctal socket which was available cheaply as surplus (I have some as well). The data sheet is here  www.radiomuseum.org/tubes/tube_4j1l.html

The tube was used quite often refurbishing radios to replace unobtainium HF or audio pentode tubes. Not part of the original radio!



Some threads discuss the replacement of this "D" battery tube line-up using adapters. It appears that in some cases a 1R5 works as mixer (DCH11) and the line-up could end up being similar to a US battery tube set. However it's up to you to test, might be worth a try. I made quite a few adapters removing the base plate from old steel tubes - that might be a challenge in the US.
 
Hopefully this matter has been clarified somewhat. Good luck with your experiments!


Ulrich  hb9aik - vk2ani




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hb9aik.ch

Ulrich Fierz

Amateur Radio and Collector Projects
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Luftwaffen-Koffer K32GWB Radio Siemens & Halske, -Schuckert Werke SSW | ...

Stiftung Radiomuseum Luzern, Schweiz

Luftwaffen-Koffer K32GWB Radio Siemens & Halske, -Schuckert Werke SSW, Electroger, build 1941/1942, 48 pictures,...
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Ulrich N Fierz
Telecommunication Engineering Services
Zurichbergstrasse 203
CH-8044 Zurich
Switzerland
<hb9aik at sunrise.ch>