Model O

1.	Remove the unit from its cabinet and locate the PLL 02A integrated circuit.
2.	Using a razor knife, cut the traces of pins 9 and 10.
3.	Solder a 2200 ohm resistor across the cut of each trace.
4.	Solder a 2200 ohm resistor from the channel selector site of pin 10, to circuit board ground at pin 16.
5.	Solder the emitter lead of the transistor to ground at pin 16 pushing the flat side down against the board.
6.	Solder a 270K ohm resistor to the base lead of the transistor. Solder the other end to the channel selector side of pin 10. (See Diagram Below)
7.	Solder a wire to the collector lead of the transistor using sleeving over the leads to avoid shorts.
8.	Solder each of the remaining wires in the cable to all pins shown in the diagram checking all connections.
9.	Solder a 2200 ohm resistor across the top terminals of the DPDT switch.
10.	Solder the four wires of the control cable to the indicated terminals of the DPDT switch as shown.
11.	Drill a 1/4" hole in the right side of the unit leaving the bottom cover on to insure proper drilling. Be careful not to damage any parts while drilling.
12.	Mount the switch with the provided hardware and adjust the VCO coil for full frequency operation.

A frequency offset switch can be added yielding all odd and even frequencies. Begin by cutting the trace of the 10.240 MHz crystal directly at the crystal. Solder a small disc capacitor around 10 to 47pf across the cut raising the frequency 5 KHz. Solder a wire on each side of the cut, and back to the noise blanker switch shorting the circuit back to normal operation.

1.	Solder a short jumper across diode D at the right rear of the unit.
2.	Adjust control RV-2 fully clockwise.
3.	Adjust the tuning coils for maximum modulated power on channel 24.