Rick -
Those are the current equalizing resistors in the cathodes of the Final
tubes.
A couple of possibilities.
1. The Bias supply in the Power Supply (AC-4) failed, causing the
finals to go into full conduction until the "weakest link" let go, which
in this case seems to have been the resistors rather than the Power
Supply fuse, tubes melting, Final RFC burning open, meter shunt resistor
burning open, etc., etc....
2. Transmitter was accidently keyed, possibly with no antenna or wrong
antenna connected, same result(s) as above.
Is this transmitter "new" to you? New acquisition?
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
<www.k4oah.com>
Rick Tucker wrote:
In checking and cleaning my T4XC, I noticed that R53 and 54, the 15
ohm 1 watt resistors in the cathode circuit are both blown in half.
What do these do and whaat would cause these to be cracked in pieces?
Thanks.
Rick
W0RT
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