Tuning the Receiver

With the Bandpass switch on the 40/30 side, the 41 Meter and 31 Meter SWL bands can be received. They are tuned in using the Bandpass Filter Tune Potentiometer, located in front of the Bandpass Filters.

41 Meter band:
Crystal Filter switch - 40/20 side
VFO LEDs - Two LEDs on
Bandpass switch - 40/30 side
Bandpass pot - slightly left of center position

The receiver will tune the 41 meter band between 7.300 to 7.600 MHz.

31 Meter band:
Crystal Filter switch - 30/17 side
VFO LEDs - all off.
Bandpass switch - 40/30 side
Bandpass pot - almost center position. Tuning is very sharp.

The receiver will tune the 31 meter band between 9.500 to 10.000 MHz

With the Bandpass switch on the 20/17 side, the 19 Meter and 16 Meter SWL bands can be received. They are tuned in using the Bandpass Filter Tune Potentiometer, located in front of the Bandpass Filters.

19 Meter band:
Crystal Filter switch - 40/20 side to receive the lower portion of the band, and set to the 30/17 side to receive the upper portion of the band.
VFO LEDs - one is on next to the 10.545 relay.
Bandpass switch - 20/17 side
Bandpass pot - slightly left of center

There is a 53 kHz section in the middle of the band (depending on the bandspread of the main tuning capacitor) that is not received. Slight adjustment of the Bandpass pot will be needed when switching between the upper and lower sections of the band.

The receiver will tune the 19 meter band between 15.000 to 15.400 MHz and 15.453 to 15.710 MHz.

16 Meter band:
Crystal Filter - -30/17 side.
VFO LEDs - all off
Bandpass switch - 20/17 side
Bandpass pot - almost all the way clockwise.

The receiver will tune the 16 meter band between 17.500 to 17.900 MHz.

This potentiometer can be either 5K or 10K. As the pot is turned clockwise, volume should increase.

If volume decreases, switch the leads to the outer ends of the soldering tabs.

A plastic/insulated knob should be used, as hum and commercial stations can be picked up through your hand into the pot to the audio amplifier.