[Kenwood] TS-520S AVC problem

Sat Dec 28 14:07:29 EST 2013

----- Original Message ----- 
From: "Richard Knoppow" <1oldlens1 at ix.netcom.com>
To: "Clif Holland" <avvidclif at wildblue.net>; "Kenwood 
mailing list" <kenwood at mailman.qth.net>
Sent: Saturday, December 28, 2013 10:29 AM
Subject: Re: [Kenwood] TS-520S AVC problem
>> ----- Original Message ----- 
> From: "Clif Holland" <avvidclif at wildblue.net>
> To: "Kenwood mailing list" <kenwood at mailman.qth.net>; 
> "Richard Knoppow" <1oldlens1 at ix.netcom.com>
> Sent: Saturday, December 28, 2013 10:11 AM
> Subject: Re: [Kenwood] TS-520S AVC problem
>>>> Rather than evaluating it with on-the-air signals turn on 
>> the calibrator and tune it in. Using the VFO tune across 
>> it rapidly. You should see a noticeable difference in the 
>> decay rate of the s-meter. Do this without an antenna 
>> connected. That will verify if the AGC is working 
>> correctly or not. Sometimes on-the-air signals can fool 
>> you.
>>>>> Thanks Cliff, I tried this and its the same on fast 
> and slow. I have done a minimum of work on this rig so 
> any hints are very welcome. I am certain it was working 
> in the recent past.
> Definitely an intermittent, I left the rig off for 
about half an hour and when turned on again the AVC works 
normally. I will let it heat run and see if it quits again. 
Time to get out the schematic. I have had to do very little 
work on this rig since getting it other than undoing a mod 
to put it on CB.
--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com