I did see Paul's reply also Nate,, I'm betting if he had some of those spurious products with the numbers he has given, they would be too small to see with even the best gear. I had a similar noise level issue that turned out to be an amp and I couldn't see squat with my HP8921a, (weak S/A) but I was warned by elmers it may not be measurable. Your suggestion is a good one.
Paul, the lesson I learned on that event was that just because the problem went away on the dummy load, don't assume all the "tested good on a dummy load" parts are eliminated. Don Kirchner W5DK -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Nate Duehr Sent: Tuesday, May 19, 2009 4:05 PM To: [email protected] Subject: Re: [Repeater-Builder] Sinclair dipole array premature failure (noisy) 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.) -- Nate Duehr [email protected] ------------------------------------ Yahoo! Groups Links
