[Milsurplus] GDR Receiver EKB aka R-5

[WF2U]

Hi all, 

I concur of course that the receiver in question is an EKB. 
Ulrich, I'm glad⁣ you mentioned the Czech version. I also have an R-5, but due to complete lack of documentation I haven't attempted to troubleshoot. Even the Czech ham I bought it from couldn't find a manual or at least a usable schematic and parts list- in any language.
The problem seems to be the AC power supply, no outputs at all. I haven't tried to use external power sources to emulate the AC supply outputs to check whether the receiver itself is operational.
All my searches on the Internet were unsuccessful in finding documentation for either the EKB or the R-5 variant.

73, Meir WF2U
Landrum, SC

Sent from BlueMail ​

On Jan 11, 2017, 3:54 AM, at 3:54 AM, Ulrich N Fierz via Milsurplus <milsurplus at mailman.qth.net> wrote:
>G'day allthis description looks like an EKB to me and there is
>information on that to be found such as here in English
>http://www.radiomuseum.org/r/funkwe_dab_ekb.html?language_id=2That
>picture shows the receiver in a gray livery but it also exists in
>military green. Excellent quality andf technically quite interesting:
>uses a miniature tube in the receiver input and then subminiature tubes
>in the rest of the RF and IF parts. Germanium transistors in the audio
>circuits. 
>There is a Czech version (built in the GDR though with German quality)
>that is green and has a AC power supply (Czech design and manufacture).
>I have here a restored GDR/Czech version which works quite well. The IF
>amplifier sometimes has instability problems when inserted in tha case
>(and when the vary-u tube is replaced by the fixed variety as was
>apparently sometimes done in the field). This was solved by installing
>a small shield (thin PCB) on top of the IF amp. I will put some of the
>pictures from 2007 on my website shortly and post here when I've done
>so.
>
>73,Ulrich  hb9aik - vk2ani
>
> Ulrich N Fierz
>Telecommunication Engineering Services
>Zurichbergstrasse 203
>CH-8044 Zurich
>Switzerland
><hb9aik at yahoo.com>
>
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