There's nothing crazy about that idea Nate! I get creative thoughts when sleep deprived too. :)
I had been thinking the transmitter might be doing something funny. I don't have easy access to a spectrum analyzer, but I think I've ruled out spurs as the primary cause? Correct me if my logic is flawed. I did some tests before I pulled the Sinclair off the tower. With the Sinclair and another antenna on the tower, here is what I found: RX & TX on Sinclair.... SEVERE noise, 10 to 40+ dB RX on other ant, TX on Sinclair.... moderate noise, peaks to 10+ dB RX on Sinclair, TX on other ant... mild noise, nil to maybe 5 dB RX and TX on other ant... maybe traces of noise??, barely detectable RX and TX on other ant, Sinclair removed from tower... no noise detected... dead quiet I think this suggests something in the Sinclair is generating noise, and that even when transmitting into another antenna it picks up enough RF to make some noise? You wouldn't believe how many pages of notes I have on various tests and experiments over the last year or so... I don't even know what's in there any more! I was hoping to get up to the site today to do a brief test duplexed into each of the other dipoles pulled from the Sinclair, but no go. Maybe tomorrow. Paul N1BUG Nate Duehr wrote: > A TOTALLY crazy idea Paul... > > Just going off of your comment that it "gets better" when you split > antennas but is always there when the Sinclair is on the tower... > > Could the Sinclair be doing something funny to your transmitter and > causing it to throw spurs? > > Things would be "really bad" when duplexed on it, and "get better" as > you move the receive antenna away from it. > > Just a thought... would need to look at your output on a spectrum > analyzer to see that one... preferably first on one of the antennas that > works and then on the Sinclair. > > Nate WY0X > (Sleep deprivation will lead to some creative thoughts, I'm finding > today. It was a loooong night last night.)
