Terry -
Amost certainly failure of BIAS supply in AC-4. Suggest AC-4R kit from
The Heathkit Shop.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
Terry Wilkin wrote:
I have a T4XC in excellent condition that has developed a problem. I
was operating a few weeks ago and notice the transmitter had moved to
transmit and I had not keyed the transmitter.
Before I could determine the issue, the fuse in the AC-4 blew.
I have replaced the fuse and with all connections removed except a
dummy load, after about 15 seconds of warm up, the relay clicks to
transmit and the plate current starts to climb.
I have replaced the vox,and driver tubes with no change in conditions.
Any suggestions?
Thanks
Terry
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