Curt -
Jim's on the right track. I'd check the Carrier Oscillator as described
in the manual in Section VIII, Para. B, 1-4. It should require very
little adjustment, unless someone has been "fixing" it! Then go back to
Section IV, Para. C to rebalance the Carrier Oscillator.
The amplified D104 works fine, _as long as you don't turn up the preamp
in the base up too high_ . Best to set the GAIN control on the
transmitter to about 10 - 11 O'clock, and then adjust the preamp gain
for about 150 - 200 mA ON PEAKS, depending upon your voice characteristics.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
<www.k4oah.com>
Hulett, Russell wrote:
Trying out my T-4X on SSB, using an old D-104 microphone with T-UG8 stand. Comments were
audio was ok but sounded like I was "in a tunnel". Another mentioned that the
audio was higher pitched than my other rigs. My T-4XB never received any similar
reports, though the microphone used with that rig is a D-104 on a G base
Being mainly a CW op, am not very adept at identifying the cause. I seem to
recall that the T-4X has less filtering than the later versions. Is this
likely the cause of poor audio or would the microphone be more likely the
issue? The reason am using different base with the T-4X is that is only one
with the aircraft plug, the T-4XB was converted by some previous owner to 1/4
inch microphone jack.
Thanks for any info and 73, Curt KB5JO
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