[Johnson] Rebuilding Johnson Navigator ???

[Jim Brannigan]

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

> If the Navigator has the same vfo as the Ranger, Valiant, Pacemaker, 500, 
> the only thing I'm aware of is the dreaded 18K current limit resistor in 
> the VFO compartment.  The part is grossly under rated and can eventually 
> decrease in value, going into a power death spiral :)  Really.  My Valiant 
> experienced that.  When I removed the resistor, it was measuring 50 ohms 
> on the ohmmeter.  That new value resulted in the Valiant blowing fuses, 
> damaging the 6AU6 vfo and OA2 regulator, and I'm darn lucky the low 
> voltage transformer didn't blow out.   The solution is to replace it with 
> a 4 or 5 watt part.
>
> Good luck with the Navigator.
> 73, Scott WA9WFA