[amsat-bb] Re: G5400B calibration problems

Joe Leikhim rhyolite at leikhim.com
Sun Jan 26 18:28:01 PST 2014

Tim; I believe there are two pots each for the azimuth and elevation 
meter adjustments. One pair are for the internal meters, the other pair 
for 0-5V to be used by the TrakBox (or similar) ADC. Make sure you 
turned the correct pair. However first I would make sure the internal 
7806 voltage regulator is producing 6 volts and does not oscillate or 
have noise on it. Dig out a DVM and scope to make sure. Those 
regulators, if not properly bypassed with a capacitor may oscillate.

Joe Leikhim

Leikhim and Associates

Communications Consultants

Oviedo, Florida

JLeikhim at Leikhim.com



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