Now connect the antenna. Set AF GAIN to 1/3 or 1/4 level. Tune to 7MHz, adjust T4 to
peak the recieved signal. Rotate the TUNE knob, you can hear ham signals, and other
radio stations. If you are testing the rig in the evening, at 5MHz, you can pick up the
beacon signal. In the day time, you can pick up the beacon signal at 10MHz, and 15MHz.
4) Align the IF trap. L3 is a trap coil which eliminates the 9MHz leakage. When the slug
is at the same level with the metal case, it is almost in the position to trap the IF. However,
it needs trimming to achieve the best result. Rotate TUNE knob to reach 8.9900MHz.
Adjust L3 until the received noise is lowest, i.e. to suppressthe signal, not to peak the
signal.
With all the calibration work finished, the main board can be placed into the enclosure.
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