This has been an ongoing problem. For the first hour or so, I get voltage off the DB-25 for every band I select. I use this to drive some small relays which, in turn, select the appropriate LC combin
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sun, 18 Jun 2006 19:06:54 -0500
Probably you are drawing too much current from those ports causing the driving device to overheat. Its probably an IC, but I don't know that since I don't have the schematic of the Omni 6 Opt 3. -- 7
The band select lines in the Omni VI versions 1-3 take a rather complicated route through the radio, existing in several forms. In some places they are twelve parallel lines, one for each band includ
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Mon, 19 Jun 2006 08:13:36 -0500
Better than a transistor for each line, you might use a logic level power MOSFET to keep the steady current zero. -- 73, Jerry, K0CQ, All content copyright Dr. Gerald N. Johnson, electrical engineer