I have been working o that KW I rescued from the scrapyard.
figured out the screen supply wiring that had been cut and the missing
connections for the RF deck, got the bias and screen supplies up,
filament supplies up, figured out keying, inrush limit, HV rectifier
system, and interlocks including the airflow switch. I did discover it
keys in part by turning the 4-1000 screen volts on and off.
still have to:
`replace broken chokes in plate power supply.
`upgrade power supply capacitors.
`remount rectifier sockets a bit lower to have the 575's clear the
variacs with more ease.
`figure out some loose wires connected to some HV resistors.
`recondition modulation transformer ('cook' in a test fixture to heat
it up, drive any moisture out, and then patch a couple places in the
insulation.).
`find some better 304TH's or 304TL's (mine have one filament out).
`find plate and grid caps to fit the 304's
`find a better 4-1000A.
`the turns counters on the dials need attention.
`devise a T/R assy (the original was apparently a relay-based
controller for the rig)
but most of this will be easy as the cut wires in the screen supply
harness were the hardest, several were interlocks or overloads.
I felt very good to put the old 4-1000 in the unit, and being able to
adjust the filament voltage, etc., even if that tube is bad, it still
lights up ok.
The web page is still at:
http://208.190.133.201/tuckerkw/tucker_transmitter.html
Patrick
KD5OEI
