Frank -
Start with the Carrier Oscillator, Filter Match & Balanced Modulator
alignment in Section VII, Section B. The idea is to get the Carrier
Oscillator "centered" in the valley between the two filters as shown at
"0" on Page 37.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
<www.k4oah.com>
iz oos wrote:
Hi Folks,
I am testing my T-4XB. Before going in the air, I wanted to check my
modulation first. Using different high impedance microphones I
transmitted into a dummy load and listened to the receiver without
antenna. I found that the LSB has a different modulation compared to
the USB. The USB is warmer and stronger. The LSB seems to me with many
highs and without basses. The USB is very clear and according to my
average output meter has more average power than the LSB mode.
Listening with the wrong sideband, in LSB when the transmitter was in
USB, I could still copy my modulation. Instead, listening to USB with
the transmitter is LSB, I could hear nothing at all.
Do you have any idea where I could have a look?
73,
Frank IZ2OOS
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