[BC] Dud 4CX20,000 and the FM25K?

[Milton Holladay]

Speaking of tubes, this reminds me: a client has a FM 2.5 K and needs a 
rebuildable 4CX3500.
Presently getting by with a freshly rebuilt Svetlana, but it won't quite 
make 80% power, for whatever reason Svetlanas don't perform properly in 
some xmtrs-
If you have one available, pls let me know.........
M

"Fourth, the transmitter can be tempermental about its tubes. I once 
replaced an aging 8990 tube with a rebuilt spare and the tuning and 
efficiency were way off. We had a second rebuilt spare which I put in 
with the same result. I put the old tube (also a rebuilt) back in and 
everything was normal. I sent the two rebuilts back and got two more 
which both worked perfectly. No cause was ever mentioned. "

-- 
Milton R. Holladay Jr. / miltron at att.net
Columbia, S. C. / 803-331-8059
RF Measurements / Planning&  Installation / Emergency Service&  Parts