[Johnson] Viking II

[Rodger]

Joe,

You can get a free copy of the assembly manual on the Bama website:  
http://bama.sbc.edu/johnson.htm  and you will also need to download a 
viewer for Deja Vu files if you don't have one already.

I have a Viking 2 and a couple of Viking 1's in my collection of Johnson 
gear and I am pretty familiar with the repair and operation of them so 
feel free to ask for any help on problems, the help is also free :)

To get you started, a common failure is from arcing due to carbon tracks 
on the 5R4 rectifier tube sockets so be sure and make sure those and the 
tube bases are clean before you start.  \

The HV capacitor is an oil type and should be fine.  You should replace 
all of the electrolytic capacitors (B+, bias, and cathode bypass types) 
as all are likely to be in need of replacement by now and they can lead 
to significant collateral damage if they fail, particularly the bias 
filter caps.

Be very careful when adjusting the tap on R-13 as the fine wire on this 
resistor is very fragile.  You can still find suitable substitutes but 
they are very expensive.

New replacements for R-25 (25K 4 watt) are more difficult to find if 
needed but this can be replaced by a small pot and a transistor if 
necessary.  The basic circuit idea can be found here:  
http://www.amwindow.org/tech/htm/drivepot.htm

Good luck with your Viking 2, it (along with the Viking 1) are probably 
the most rugged and reliable transmitters produced by E.F. Johnson.

73, Rodger WQ9E

Joe Walden wrote:
> Hello and Happy New Year from Joe w5jdy in Okla...   I seen to have started
> a life-time project on an old Viking II transmitter and could use some
> Help....   Hopefully somone out there has the step by step assemly manual
> for the Viking II... As always,I will gladly pay for your time and effort
> for a copy...   Please contact me at:    w5jdy at intergate.com
>
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