[Johnson] VIKING VALIANT II

[AA8K73 GMail]

Please consider using some form of current-limiting, like the 
"dim bulb" circuit.  A shorted capacitor can open your 
transformer winding faster than you can get it turned off.


On 10/29/18 10:55, Ed - K9EW wrote:
> I inherited a Valiant II from my friend who is now an SK.
> 
> The radio is in excellent condition.  I've never seen such a clean
> chassis.  But I'm a QRP guy, so I'd like to sell the radio to someone who
> would actually use it.  I'd really like to check it out first so I can tell
> the buyer that it works.
> 
> I brought the line voltage up slowly for the Power On test and let it cook
> for a half hour with no signs of a problem.  But now it's time to hit the
> Transmit switch, and - short of putting the output of my variac directly
> onto the HV transformer primary - I don't see how I can avoid instantly
> applying the HV to the electrolytics, running the risk of a small
> catastrophe.  Even using this approach, I'd have to flip the Transmit
> switch (S8) to activate the voltage regulator tubes V9 and V18 which would
> mean unsoldering one side of the HV primary to isolate the primary.
> 
> Any suggestions?
> 
> Thanks - k9ew