No RF on AM

John King k5pgw at YAHOO.COM
Sun Dec 23 13:27:08 EST 2007


John, Gary has a great question. When on CW, the
secondary winding of mod xform is shorted across
placing the H.V. on the final tube plates.

On A.M. the secondary is unshorted and the H.V. is run
through the secondary winding to final tube plates.

Check for H.V. on input side of secondary of mod xform
to see if there is voltage there with switch in A.M.
position  and then check on output side of secondary
for H.V. going to final tube plates.

Hopefully it is not the secondary of mod xform being
open. Good luck and 73, John, K5PGW


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