Bill -
Sounds almost like it's in SPOT. Possibly a switch anomaly. There can't be PLATE (Cathode) current
on the meter ''normally" unless the relay is pulled in. Check carefully around the meter terminals,
if one of the terminals is shorting to the chassis?????
So..... Just a guess, but I'd look for a short across the relay contacts that ground the Cathodes
of the PA. The set of contacts has the 'arm' grounded. When the relay is 'open' it grounds the
MUTE line of the receiver, (enabling the receiver,) and when the relay is 'closed' it grounds the PA
Cathodes.
Let us know what you find, or if you get further symptom information. Like, what is the PLATE
meter reading, idle or operating current.
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>
Bill wrote:
Ok, got a good one....my t4x just started showing cathode current even when I don't have the key
down on the mike or the cw key..its there all the time and I can hear a carrier on
my r4 all the time...doesn't matter where the controls are set...seems the finals are in transmit
all the time and the relay isn't pulling in, it only pulls in when I key the mike..I can even
hear my voice in the r4 without the key down...hmmmm.....
73
Bill
Wa2jhs
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