[AMRadio] Johnson 500 Schematic

[Dave Harmon]

Recently I acquired a Junkston 500 and it works great....except the keyer is
not adjustable.
The rig can be keyed ok but the adjustment pot has no effect.
Yes...the pot is good.
The keyer does not conform to the schematic I have.
Apparently I have an early model but a later schematic.
Can anyone help me out with the early schametic?
All I need is a .jpg of the keyer area......or a location to dwnld the early
schematic.
I think the early schematic will show a 4-250....

Dave Harmon
K6XYZ[at]sbcglobal[dot]net
Sperry, Ok.