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table for the band your rig is on. A frequency tolerance of +/- 200 Hz is close enough.
[ ]
Since there is some interaction between these two settings, repeat these two adjustments until
both ends of the band are set to your satisfaction.
Receiver Front-End
This procedure will optimize the receive sensitivity. With the receiver operating, apply a mid-band
signal to the antenna connector using a signal generator (the NORCAL S1-S9 generator is
recommended) set for 50 uV or less. As an alternate, attach an antenna and find a moderately strong
signal. The VFO should be tuned to the center the signal in the receive passband. Beginning with trim
capacitor TC3, peak TC3, TC4, and TC5. Repeat this step a few times to obtain the loudest signal
under these contitions. Reduce the signal level to approximately 1 uV and repeat the peaking process.
TxLO
In this step, we will match the transmit frequency to the received frequency With the rig transmitting
into a dummy load, adjust the transmit LO trim capacitor, TC10, to match the tone that is heard in the
receiver when a cw signal is being received.
Transmit Strip
This step will maximize the RF power output from the rig.
[ ]
Set the VFO to the middle of its tuning range, 5-turns from full CCW on potentiometer R54.
[ ]
With the rig transmitting into a dummy load/watt meter, peak the power output by adjusting
trim capacitor TC7 in the VFO driver stage.
[ ]
Alternately adjust trim capacitors TC1 and TC2 in the Cascode Amplifier stage for maximum
power output as indicated on the watt meter.
[ ]
Adjust trim resistor R87 in the Tx Driver stage to set the power output level you want.
[ ]
Alternate between the previous two steps until you are satisfied with the settings.
[ ]
Adjust the RF output power with trim resistor R87 to the desired power level. Four-watts is
recommended.
Remove PCB Temporary Wiring
This step will remove the external controls and their temporary wiring.
[ ]
With the completed PCB still on the standoffs, carefully remove all of the external controls and
their wiring. It is suggested that all wires between a control and the PCB be cut in the middle.
[ ]
With the PCB inverted, so that the bottom side is up, heat a connection point and pull the
wire out from the top side, the side facing the workbench surface.
[ ]
Using a solder sucker, carefully reheat that pad and suck the solder out so that the hole is open.
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