It is a Johanson model 5602 1-30pF. They are not easy to find and
expect to pay 10-15$ for one.
At times when I needed a replacement, I modified the disk to take 3
Johanson 5202 1-10pF trimmers in parallel which are much easier to find
cheap. They may even be higher Q than the single unit but I have not
been able to prove it.
Burt VE2BMQ>>
Bill Ockert wrote:
> Good Afternoon,
>
> I have a Sinclair Model 202G duplexer in which one of the insertion
> loops has a bad (cracked) piston capacitor. Has anyone had occasion
> to replace one of these and if so what did you replace it with?
>
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