[Premium-Rx] Fwd[2]: Re: Russian R-399a HF receiver, info anyone?

[Ed Tanton]

This very kind of thing is why I DIDN'T take in trade (from China) the tube-type receiver of the two types offered for the R-390 I sent the guy. I figured I could manage to figure out a substitute semiconductor, but with unknown or unavailable substitute tubes you could very well wind up with a non-functional receiver that-at a minimum-might require a new socket/tube.

http://n4xy.com/rcvr_Chinese_Army.html 

Ed Tanton
 
website: http://www.n4xy.com 
 
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-------- Пересылаемое сообщение -------- От кого: Борис Никитин <ua3mcj at mail.ru>
Кому: hbreuer at debitel.net
Дата: Wed 28 Nov 2012 21:31:27
Тема: Fwd: Re: [Premium-Rx] Russian R-399a HF receiver, info anyone?


Hello Heinz,

Thanks. For the information russian type 6C4П that is speciall,  low noise triod for Ground Grid Amplifier aplication.
Has 4 pins from grid to bring parasitic inductance to minimum level. 

Equivalent from Western Type as follows: EC88, 6DL4, 8255, E88C last two prabably some simple modification will required. 

R399 problems- I'm not sure, but looks like wrong power line connection...
If any problems will arised with russian system components designation (it not simple) please let me know...
Will find out some ideas for substitution with western type components. 

Vy 73's
Boris
UA3MCJ




----- Пересылаемое сообщение --------
От кого: Heinz Breuer <hbreuer at debitel.net>
Кому: Борис Никитин <ua3mcj at mail.ru>
Дата: Wed 28 Nov 2012 12:54:13
Тема: Re: [Premium-Rx] Russian R-399a HF receiver, info anyone?

Hello Boris,
I have two R399 KATRAN myself and really enjoy operating them.
Currently one has a problem with low sensitivity and synthesizer out of lock temporarely.

A friend also got one R399 recently and his ground fault indicator trips when he powers it up. It also damaged his active antenna. It is a Warsaw Pact tube type unit. One 6C4P tube is blown. 
He already removed the two 22nF capacitors from line to grounded cabinet in the R399 power supply with no effect. According to the manual there is nothing else which may trigger the ground fault indicator. Hopefully the power transformer is not bad.
vy 73 Heinz DH2FA, KM5VT

Von meinem iPhone gesendet

Am 28.11.2012 um 12:21 schrieb Борис Никитин <ua3mcj at mail.ru>:

> Hello Gent's
> 
> Some few min's ago find out Soviet Era Military R-399A HF receiver 
> discussion...I got my own professional experience with this radio. Not bad! Sure...Very reliable, rugged, brutal radio for mllitary and commercial consumer.
> 
> For example about 90 percent of capacitors inside that is "KM" type!!! 
> PALLADIUM type condenser...Very well eqipped with electro-mechanical 
> filters...So if anyone said that that is not a good one...Simply people "played game" or know nothing about that rig.
> 
> Best Regards for all...
> Boris Nikitin
> UA3MCJ
> ex UA9WW...
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