Want to re-do the input matching of an old HB 8877 amp. What should I use for
the cathode impedance when calculating my pi network? I recall it was
something like 50-60 ohms.
Also, thinking attenuating the drive power AFTER the T/R relay and before the
matching network. Right now it only takes 22 watts for 1500 out at 4 KV. A
bit touchy to tune (only been like that for 27 yrs.) Would be nicer to tune at
60, or so, watts out. I saw where Henry radio has some attenuators on Ebay
that might fit the bill.
73 de Steve, NR4M
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