Quote:
Originally Posted by Diabolical Artificer
I've had the odd valve crack and go to air in Tek 500 series scopes over the years, see the latest, an ECC83 & ECC88 out of a 533A. The ECC88 has several big cracks, they seem especially prone as I've had more 88's go to air than any others. These being in the valve bases in a scope in a shed.
Never had an octal go to air or bigger OP valves.
Andy.
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Those pins look quite corroded, same as failures I've had in stuff I've bought, that were showing the signs of being stored in damp places.
Also had numerous cold cathode displays fail with corrosion related cracks, both wire ended & pin types.
Not all were related to damp storage, recently found a cracked valve in my HP TDR plug-in, that had been stored in a spare room in the house.
David