Richard, it sounds like a bad mechanical connection in the antenna, or possibly a moisture issue. Check out the eHam reviews of it:
< http://www.eham.net/reviews/detail/617 > Mike - AA8K Richard Stouffer wrote: > I need some advice on what appears to be a very basic antenna/radio issue. > As far as I can tell is has nothing to do with my radio (5000A). Let me > explain: > > > > Because of deed restrictions I have hinged my vertical antenna on a mast and > only put it up during darkness- I love winter. I also have a loop that lies > on the roof that I use during daylight, but it's a pretty lousy antenna; as > a matter of fact the vertical when it's folded down is a far better > receiving antenna than the loop on the roof. > > > > When the vertical is down the noise level signal is steady. The received > signal on the loop, although a much higher noise level, is also steady. > However, when the vertical is raised the signal fluctuates randomly. The > signal (the entire signal indication, not just the noise level) increases by > about 10db but the duration of the elevated signal is a second or two. I > also noticed that when I checked it with the MFJ 269, the SWR fluctuates > also. From the signal reports I'm getting, my transmissions appear to be > steady, although I wouldn't bet on that. > > > > I replaced the coax yesterday and it had no effect. There are no tree limbs > hitting the antenna. The antenna is a Hy Gain DX 77A. All of the utilities > in this subdivision are underground and the nearest high power transmission > lines are at least a half mile away. > > > > Any ideas on what the problem might be. > > > > Thanks, > > Richard, WU5K > > _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
