In that case a dual gang stereo volume control pot should work. You
still might be able to revive it with contact cleaner or De-Oxit spray.
Bob WB2VUF
On 2/7/2011 10:06 AM, Steve Hunt wrote:
> The potentiometer wasn't marked other than with a manufacturer's number.
> It measured 211k across the ends, and mid-way on the rotor the
> resistance from the slider to either side was 176k/35k, so I think it's
> safe to call it a "220k log".
>
> 73,
> Steve G3TXQ
>
> On 07/02/2011 14:34, NL7VL wrote:
>> Hi Steve,
>>
>> So you're saying that the double-gang notch pot on the Corsair I is a
>> 220K? That's about how it measured out with the ohm meter, but it does
>> say 500K on the schematic. Jerry's right about things showing up on the
>> case of the pots, but all I saw was what looked to be an OEM part
>> number or something like it. Please let us know how it goes.
>>
>> There are a few DDS mods for the oldies out there - like N4YG's mod. I
>> have a Corsair II PTO that I will be investigating this week. It's kind
>> of a crap-shoot with those things: The Century 21 I have stays within
>> 50hz after warm-up, but it was rebuilt no so long ago. Going with the
>> DDS + display combo heads off future problems with the original display,
>> too. Not a bad idea. I had thought about using a "Huff-and-Puff" or some
>> kind of fast response phase lock loop on the PTO, but maybe that's not
>> the way to go.
>>
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