[Johnson] Rebuilding Johnson Navigator ???

[Jim Brannigan]

Allow me to modify my original statement.
I replaced all BUT the temperature compensating capacitors.
If I could find a source for them, they would  be replaced too.

Jim


>I wouldn't be too quick to replace any of the capacitors in the vfo circuit
> unless there is obvious signs of them being bad. Not sure about the 
> Johnson
> vfo's but most have temperature compensating capacitors that were chosen 
> to
> minimize drift.
>
> 73
> Gary  K4FMX
>
>> -----Original Message-----
>> From: johnson-bounces at mailman.qth.net [mailto:johnson-
>> bounces at mailman.qth.net] On Behalf Of Jim Brannigan
>> Sent: Wednesday, January 24, 2007 9:22 AM
>> To: Freeberg, Scott (STP); Michael Crestohl; johnson at mailman.qth.net
>> Subject: Re: [Johnson] Rebuilding Johnson Navigator ???
>>
>> I would also take a hard look at the fixed capacitors in the VFO circuit
>> and
>> check the values of the carbon resistors.
>> The original siver mica "postage stamp" capacitors in a Ranger (same VFO)
>> were leaky.
>> It is so difficult to get at the VFO, that you want to do it right the
>> first
>> time.
>>
>> Jim
>>