[Johnson] Will be restoring a Johnson Ranger

[Roy Morgan]

Valiant problem in the Ranger too?

Some Valiants had instability on 40 meters.  I do not know if this happens in the Ranger too.  The cause was RF getting into the VFO via the front of the VFO housing.
The Cure was a to add conductive wipers bearing on the VFO shaft where it enters the housing, or flexible braid grounding from the shaft to the housing.

Many Valiant owners (and Ranger owners too?) moved the VR tube dropping resistor to outside the VFO housing to minimize heat in there and resulting drift. (Another poster mentioned that the original part is under sized, thus leading to failure.)

Roy

> On Feb 13, 2022, at 12:56 PM, donhellen at roadrunner.com wrote:
> 
> What I would like to know is where to begin troubleshooting if after I re-cap
> the electrolytics and wax dipped caps, it still doesn't work?
> ...
> I guess I'm just asking where the common failure modes are in these transmitters
> so I can have a place to start. 

Roy Morgan
K1LKY since 1958
k1lky68 at gmail.com
Western Mass