Re: Help to repair my HP654A Test Oscillator
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Maybe mine needs a similar fix.? I will look at it one of these days.? Low distortion is important.
Bob
On Monday, December 16, 2019, 02:34:28 PM PST, Marco Marchesi <marco.marchesi@...> wrote:
Hi. GOT IT!
There was a ground loop gathering noise and hum.?
I moved the ground connection of the third gang of the variabile Cap in the same point where Wien bridge resistive leg is grounded.
Now I got -50,1 dB THD @ 1 KHz, -10 dB under spec.
I'm really happy.
Thank you!
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