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I have seen this problem before - with the SWR pegging. My problem boiled down to a bad coax connector at the antenna interface. Jamie WB4YDL On Friday, September 27, 2002, at 08:40 PM, Rick Tavan wrote: > Just put up a Sigma 80 for tuning at about 25'. Eventually it will be > at 75 or 80'. Two problems so far: > > 1) The relay box is supposed to add 40 kHz for in-mode switching and > 275 kHz for Cw/SSB switching. Mine seems to be adding roughly 100 kHz > and 350 kHz using an MFJ analyzer (and nearly 1:1 SWR). Any > suggestions? > > 2) With the relays open (coils in the circuit) I adjusted the main > coils for resonance at about 3520. Listening, I hear a clear band > noise peak around there. If I transmit even a single dash at 20w or > more, the SWR needle on the xcvr hits the pin and the band noise goes > away ... for 12 seconds! Then it comes back. This is quite repeatable. > In fact, just listening for a few minutes, the band noise seems to ebb > and flow quite noticeably. But the change on xmit is quite pronounced. > It seems as if something is acting capacitively and then discharging. > Weird. Any thoughts? > > 73, > > Rick N6XI > > > > > > -------------------------------------------- > Force12Talk mailing list provided as a service by Force 12 Antennas, > Inc. > Force12 Web Site: http://www.force12inc.com > > To Submit Message to the List: Force12Talk@qth.com > To unsubscribe and view the Message Archive: see > http://qth.com/force12/list > For problems with the list: contact n4zr@qth.com > -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force12 Web Site: http://www.force12inc.com To Submit Message to the List: Force12Talk@qth.com To unsubscribe and view the Message Archive: see http://qth.com/force12/list For problems with the list: contact n4zr@qth.com |
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