[Johnson] Viking II help

[W4AWM@aol.com]

Hi Steve,

Sounds like to me that you have the Viking Model 250-31 Grid Block Keying 
Module installed.  It is on a small chassis that is supposed to be installed 
on a couple of metal spacers.  There is a 12AU7 and a 100K pot mounted on it. 
 The chassis has two side lips but no ends.

I have a Factory wired II that the owner changed the power socket on the rear 
chassis to a 9 pin also.  I have no idea why.  He told me about it when I 
bought it from him at a hamfest, but I neglected to ask why he made the 
change. He did give me the old socket and shield and my intention it to 
reverse the mod one day. I have never had time to get into the rig so I am 
not sure if the keying mod is in there or not.  I bought the mod kit 
separately for another rig.

The power rating on R-13 and R-28 is 50 watts. R-13 is the high voltage 
bleeder resistor. Something spilled on my schematic, but it appears the R-28 
is employed to chenge the final screen viltage in the CW mode.

Good luck and keep one hand in your pocket!.

John,  W4AWM


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