[Johnson] Ranger VFO chirp on 40 Meters

[David Harmon]

Guys.....they chirp less if installed in the cabinet....so try that if not.


73

David Harmon
K6XYZ
Sperry, OK

-----Original Message-----
From: johnson-bounces at mailman.qth.net
[mailto:johnson-bounces at mailman.qth.net] On Behalf Of Bill Cromwell
Sent: Friday, March 7, 2014 9:15 AM
To: johnson at mailman.qth.net
Subject: Re: [Johnson] Ranger VFO chirp on 40 Meters

On 03/07/2014 09:52 AM, Harry Vaught, KT4AE wrote:
> I'll continue to post this until it fixes someone else's problem.
>
> Originally my problem was a lack of grid drive on 80 meters.  This was 
> largely corrected by replacing R8 (R6 on another schematic), the V3 
> screen grid resistor, which had migrated to almost twice its original 
> value.  I was left with a horrible chirp.
>
> Eventually, I found that R9, which is on the bandswitch and hidden by 
> the shield under the chassis, was cooked and split.  It looked ok 
> until the shield was removed. I had checked this resistor off my list 
> but must have just looked at it from outside.  I suppose this resistor 
> had failed because of the R8 problem.
>
> The Ranger now has the most beautiful sounding tone which looks nearly 
> perfect on the SB-610.
>
> Harry, KT4AE
> Watkinsville, Georgia
Thank you Harry,

I'll check all of those things when I get back into mine. As for the
shielding integrity I have already been there. It was bad and it did reduce
the problems. Some of the screws and nuts were even missing! But the 40
meter VFO is still godawful!

73,

Bill  KU8H
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