I am new to the Drakelist forum and not sure of the proper way to post.
If I do something wrong please let me know and I will make ever effort to
correct it.
I was given a set of Drake TR-4B/T-4XB and AC-4 P/S from my uncle's estate,
WA4HCX who became a SK in June of 2008.
The receiver works great, but the transmitter will not load. In the tune mode
with the T-4XB ON the meter reads about .15
However I have No output at all. I can barely heard what sounds like a relay
click with the meter movement as I switch the power on.
With Fluke VOM the Plate voltages are 738 VDC, Low Voltage is 280 VDC and
bias is -60 VDC. AC volts less than one on all DC voltages checks.
With receiver ON I can hear a faint beat frequency or tone from transmitter But
this tone doesn't change with band select or frequency change on receiver or
transmitter. I have no defection at all on a inline RF meter to dummy load. RF
Tune, Load and Plate Tune have no effects.
I have check about all the resistors in the Mixer, Driver and Final tube
circuits. Everything seems to be OK. I'm not sure at this point what to do.
I appreciate any suggestions or advice that anyone may offer.
Thank You,
Fred
KC4SUE
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