[Boatanchors] German WWII Siemens K32 GWB Tubes

[Ulrich N Fierz]

Goood afternoonplease 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  )and these areDCH11 (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
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 4SH1 is actually a Russian tube with a loctal socket which was available cheaply as surplus (I have some as well). The data sheet is here http://www.radiomuseum.org/tubes/tube_4j1l.html 
The tube was used quite often refurbishing radios to replace unobtainium audio output tubes.
Some threads discuss the replacement of this 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. Stell tube bases for adapters seem to be available from China.
 Hopefully the matter has been clarified somewaht. Goos luck with experiments!

Ulrich  hb9aik - vk2ani
URL hb9aik.ch
Ulrich N Fierz
Telecommunication Engineering Services
Zurichbergstrasse 203
CH-8044 Zurich
Switzerland
<hb9aik at sunrise.ch>