On Jun 28, 9:51*pm, "Richard Knoppow" wrote:
"Radiola" wrote in message

...



Hello,

I'm the owner of an SP600 now aligned, and receiving well.
The only
issue I'm stuck on is the signal strength meter is not
reading. *The
AVC (?) side where it reads modulation works when switched
in, but no
S reading. *This indicates a live meter, but why no signal
strength on
any signals? *Strong or weak, nothing registers. *Any
ideas or
suggestions?

Thanks,

GB

* * * The S meter reads carrier level at the detector and is
switched off when in Man RF gain contol. Make sure the
momentary meter switch is working properly. You can squirt
some contact cleaner into it around the terminals. I've had
one go dead until cleaned. Other than that make sure the
side of the AVC-MAN switch that connects the meter is good.
Again, some contact cleaner there may fix the problems.
Also, check the meter level adjustment to make sure its not
all the way off and is not open. This is a very simple
circuit and not very much can go wrong with it.
* * * BTW, the meter will vary with the modulation level on
AM because the AVC time constant is so fast. You can slow it
down if you like by hanging a capacitor across the AVC
terminals on the back of the RX. This will also cure low
frequency intermodulation distortion in the audio.

--
Richard Knoppow
Los Angeles
WB6KBL


Thanks Richard,

I will give this a try. There's been a garden variety of contact
problems with this receiver because of where it was stored, so on.
Hopefully this may do the trick. Again, thank you for your help.


Thanks,

GB.