Conversion Steps
Now might be a good time to check R2. R8, R83, and R91 to insure that they
are turned totally counterclockwise. This is to make sure that the transmitter
RF drive level is at minimum, and that the MOSFET bias levels are also at
minimum. During the alignment procedure you will readjust these
potentiometers to their proper levels.
BFO Components:
[ ] Remove L5 (8.2 uh molded inductor) marked GrayRedGoldGold
[ ] Install new L5 (6.8 uh molded inductor) marked VioletGrayGoldGold
[ ] Clip excess lead length.
[ ] Inspect solder connections.
[ ] Remove X5 (11 MHz Crystal)
[ ] Install new X5 (12.96 MHz Crystal)
NOTE: Before you install the new crystal for X5, you may want to temporarily
insert each new 12.96 MHz crystal into the BFO oscillator position (X5) and
measure the default frequency for each crystal (measure BFO frequency at the top
of R67). Mark each crystal with it's frequency. Now select the 4 crystals which
are closest in frequency for use in X1, X2, X3, and X4. The remaining 12.96
MHz crystal will be your X5 crystal for the BFO oscillator. While not absolutely
necessary, this procedure may provide steeper sidebands on your crystal filter than
would a random selection of crystals.
[ ] Remove X1 (11 MHz Crystal)
[ ] Install new X1 (12.96 MHz Crystal)
[ ] Remove X2 (11 MHz Crystal)
[ ] Install new X2 (12.96 MHz Crystal)
[ ] Remove X3 (11 MHz Crystal)
[ ] Install new X3 (12.96 MHz Crystal)
[ ] Remove X4 (11 MHz Crystal)
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