[Johnson] Viking500 Audio Mod

[Ed Wirtz]

hi guys,

This may be old hat to many of you but I have come up with a simple 
wiring change to the 6B4 modulator driver amplifier.socket that will 
allow use of either a 6A5G or a 6B4. In the service we are using these 
tubes they are identical in performance. I know that the 6A5G and 6B4 
are both expensive because the audio phools are grabbing them up but 
some of them don't seem to know about the 6A5. I have made this mod to 
two 500s including my own and they both work great with either tube as 
the audio driver.

If you feel this is of value I can write up the mod and post it here.

Thanks and keep those Vikings perking.


73,

Ed, KØBKA