[amsat-bb] RE: Thanks

["Alan P. Biddle" <APBIDDLE@xxxxxxxxxxx>]

Antonio,

It has been a LONG time since I built my TB..  The unit has open collector
drivers which will handle something like 25 volts, but you need to break the
connection to the internal 5 volt reference by cutting BR4.  My G-5500 uses
about 15 volts.  So cut BR4, and you should be fine.  The current draw is
only about 2 ma.

Note that some, or perhaps all, copies of the G-5500 manual have an error on
the UP and DOWN control lines.  You can check yours with a jumper.  The
correct wiring is Pin 3 for UP, and Pin 5 for DOWN.

Good luck,

Alan
WA4SCA


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Arthritic bureaucracies don't tame new frontiers.

Paul A. Gigot
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