I found there was some shift in the reference oscillator
frequency of my TS-440S. This can be noticed and corrected
as follows:
-
Remove the top and bottom covers from thd radio.
-
Do not disconnect the speaker cable.
-
Connect the supplied calibration cable between RF Unit
and PLL unit, as shown in "Kenwood TS-440S Instruction
Manual" on Page 24 in Section 5-8-3.
-
Set VFO A to 10.001.00 MHz LSB and VFO B to 9.999.00 MHz
USB.
-
Pushing the A/B function button, you can have different
audio signals, if that 36 MHz reference oscillator is
miwadjusted.
-
Using a small flat bladed scredriver, adjust trimmer
capacitor TC1, near connector 8 of the PLL Unit (the
location shown in Instruction Manual in the same section
as above) until those audio frequencies from VFO's A and
B are equal.
-
Disconnect the calibration cable and reassemble the
radio. This procedure can be done by ear with good
accuracy without any measuring equipment. WWV is too
weak here in Finland to use it as comparative signal for
the procedured described in "Instruction Manual", Section
5-8-3.
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