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Old 2nd Dec 2022, 4:37 pm   #21
stevehertz
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Default Re: Any way to make the variable tuning capacitors shine?

I am unconcerned with how shiny they are, they perform a function and that's good enough for me. If there's lots of dust and detritus in between the plates I blow it out with a variety of 'blowing tools' depending on how bad it is, and if necessary use a half inch paint brush to remove any remaining more stubborn stuff. The odd spot of oxidisation doesn't concern me so long as it's working. My main concerns with tuning caps are getting a good, clean, highly conductive path between the moving plates and their spring contact. I also lube ball bearings with a light oil.
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Old 2nd Dec 2022, 8:20 pm   #22
Radio Wrangler
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Default Re: Any way to make the variable tuning capacitors shine?

Look for the VFO section in the G3PDM synthesised receiver in the receivers chapter. It follows the G2DAF receiver and seriously out-weirds it

Shininess and rounded edges become helpful in transmitter tuned output stages and in ATUs where you want to discourage arcing. Too difficult to do for low power stages and receivers.

David
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Old 2nd Dec 2022, 9:53 pm   #23
Bazz4CQJ
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Default Re: Any way to make the variable tuning capacitors shine?

Quote:
Originally Posted by Radio Wrangler View Post
Look for the VFO section in the G3PDM synthesised receiver in the receivers chapter. It follows the G2DAF receiver and seriously out-weirds it David
Alas, no. The last Rx in my '68 copy is the G2DAF. No worries.

B
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