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Old 15th Apr 2019, 3:28 pm   #80
Philips210
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Join Date: May 2007
Location: Redruth, Cornwall, UK.
Posts: 2,573
Default Re: Chinese 1A2 Super Regenerative FM radio kit

Quote:
Originally Posted by VT FUSE View Post

This green corrosion product results from long years stood on pins in damp cardboard multi compartment boxes usually in damp storage.


Mike
Hi.

Yes, that's understandable. I've also seen severe corrosion on valve pins in Mullard boxes that use the plastic "Kradlepack" packaging.

I tried an experiment to see how well valve pins corrode if the valve was left outdoors. Back in 2010 I put an old B9A type valve (possibly a 6F22 from a GEC TV) out in my garden. I retrieved it a few months ago and was amazed to see virtually no corrosion on the pins.

Regards
Symon
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