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Install diodes, resistors, NPO capacitors, USM capacitors
and integral circuit.
Install trimmer potentiometer, chokes, NP caps, relays,
audio connector and BNC connector.
Temporary Connection Between Antenna and RX (Mixer Input)
Solder a wire to connect the antenna "hot" pin on the BNC connector to the
Mixer Stage's Input point on the board, as indicated below.
Check +voltages on each NE5532:
pin 1 = 6V
pin 2 = 6V
pin 3 = 6V
pin 4 = 0V
pin 5 = 6V
pin 6 = 6V
pin 7 = 6V
pin 8 = 12V
At this stage it is absolutely essential to ensure that
both I and Q channels are working properly
and image rejection is adjusted (-40dB or better).
Download and setup Winrad
For image rejection adjustment procedure go to
Note: above adjustment tutorial is for G40
but the basics are the same. For example, for 30m band
LO (center frequency) is 10.125 MHz.
Set signal generator or 30m transmitter to 10.117 MHz and
adjust image at 10,136.