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Make sure the trim caps are oriented as
C23 C25 - 50 pf trimmer capacitor.
shown above. They have polarity that can affect tune up.
Make sure to short the correct pads on JP3.
The jumper location is shown in the picture above. If the
jumper is removed, a switchable attenuator can be added in its place. The unused third pad on JP3 is a
ground pad to attach the ground legs of an attenuator.
Detector Tests
Apply 9v and check that all the detector caps (
C22 C27 C29 C32) have 1.5v across them.
Using an ohm meter, check that Terminal 2 and 3 of T1 are both shorted to ground.
Remove the 9v battery.
Norcal NC2030 v5
12-18-05
Page 73 of 128
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