[R-390] calibration osc

[Michael Murphy]

Steve,

I had the same experience with the way out of tolerance resistors in the
calibration oscillator section of my Stewart Warner receiver and changed out
quite a few with a power size larger. I suspect that this "digital" circuit
stresses the resistors. This was also a common problem with early logic
devices using vaccum tubes. They actually had to design the tubes to be
tougher too.

Mike Murphy WB2UID


----- Original Message ----- 
From: "Steve Hobensack" <stevehobensack at hotmail.com>
To: <r-390 at mailman.qth.net>
Sent: Monday, August 01, 2005 9:46 AM
Subject: [R-390] calibration osc


>    My calibration oscillator (1963 Imperial) puts out two carriers several
> hundred cycles apart. One is weaker than the other. It is almost as if the
> multivibrator is not phase locked to the main xtal oscillator. Both
carriers
> are stable, and I have zeroed the stronger carrier to wwv. It is not a
> serious problem, but I would like to fix it next time I have the rf deck
> out. Any ideas?  Thanks.....Steve....N8YE
>
>
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