[Johnson] Viking II : Low plate current

[Greg Mijal]

Check all the power supplies.  The big sliding tap resistor is a common 
failure item in the Johnson.
73's
Greg
WA7LYO
in sunny Feenix
----- Original Message ----- 
From: <dgbergmann at comcast.net>
To: <johnson at mailman.qth.net>
Sent: Sunday, December 31, 2006 4:44 PM
Subject: [Johnson] Viking II : Low plate current


> Recently acquired and recently working Viking II has developed problem. 
> Tunes up by the book until we turn on plate supply and turn up the drive- 
> cannot get more than 40ma of plate current, and final will not load. 
> Voltage at plates measuring about 800 volts.  New 6146's. Textbook 80m 
> dipole, ladder line and matchbox, 122 VFO.  Checked all the usual dumb 
> things many times. Nothing noticeably amiss- no smoke, etc. Any advice for 
> beginner returning to ham radio after 38 year hiatus appreciated.
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