Help with SB-301

[KD2E]

With the function switch on standby, the receiver mutes when the short is
REMOVED from the mute connector.
As far as the AGC....I have an SB301 whose slow agc acts like fast after it
warms up. I have another SB301 that works beautifully!  On the good one, I
opened up the LMO, and cleaned/lubricated it. The dial now turns smooth as
butter. A lot of the SB radios had kind of 'sticky' tuning. It actually
performs quite similar to my SB303.
...Dave

----- Original Message -----
From: "Mark Graalman WB8JKR" <wb8jkr at JUNO.COM>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Saturday, January 06, 2001 9:27 PM
Subject: Help with SB-301


>   I have a Heath SB-301 that I've been slowly bringing
> back to life, I got it working pretty good but there is
> a problem with the AGC and muting. In short, the AGC
> is just about worthless, not enough AGC voltage is
> developed even with VERY strong signals and the
> receiver overloads terribly, unless I run the audio
> gain up and ride the RF gain constantly. I have
> checked the AGC diodes and even increased the
> coupling capacitor to the I.F. from 5 pf to 10 pf and
> it did almost nothing to help. Also the receiver
> doesn't mute when the mute jack on the back is
> shorted to ground.
>
>   Is this a common problem with this receiver?
>
> Mark  WB8JKR
>
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