[R-390] AGC problems

[Dan Merz]

Ivan,  I'm sure you'll get plenty of advice on this - I'm a relatively new guy to R-390a
and the solution to this problem for me for ssb reception was:

put in the two diodes that improves the agc response for ssb - discussed plenty in the
R-390a archives

improve the audio amp - first I used an external audio amp on the diode load connection
out the back - this was excellent.  second I built a modified internal audio amp using
6360 tubes ala Electric Radio article - this wasn't quite as good as the external amp but
still very good and is what I use because I don't need any external equipment.

Dan.

�yvind wrote:

> Can somebody tell me what the problem could be on my R-390-A, that i just
> bought.Strong stations completely overrides my AGC, i have to back off on
> the RF-Gain to get a reasonably readable signal.I figure there must be a fault
> somewhere.
> I am allso not pleased with the adio, it seemes to distort if ever so slightly
> but still annoying. Could the two problems be related ?
> I have had a look at the "Problem  caps", but so far has not done  the operation.
> With all the experiance out there, i am shure somebody has had similar
> encounters.
> By the way thank you guys for all the first class info, my printer is running red hot.
>
> Regards  Ivan Heimdal
>
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