Noticed my swr on 10m slowly climbing out of no where the other day..Running an ft 857d at 100w never did get an swr alarm from the radio but decided to put an external meter on and it was around 4:1 not good. Checked all the fittings, checked the coax, nothing made sure I still had a good ground (it's a through hole roof mount) that was good...I'm thinking maybe water and a coil failure..any thoughts? Tried cleaning it out and no dice.
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Sirio Pl5000
- Thread starter Charlie337
- Start date
It's not as though there are a kot of parts in this antenna. There is a whip, a coil, the casting that contains it all, and the coax/connector.. Divide and conquer. Corrosion is the most likely suspect - IMO . . .
charlie,
have you checked the bottom coil or just the one in the pic?
its shunt fed dc grounded so you should find a coil in the lower part,
look underneath there are 4 small screws that strip threads if you keep hitting trees or bridges,
check for continuity between the joint and the metal where the srews are, and between the metal and center pin,
good luck
have you checked the bottom coil or just the one in the pic?
its shunt fed dc grounded so you should find a coil in the lower part,
look underneath there are 4 small screws that strip threads if you keep hitting trees or bridges,
check for continuity between the joint and the metal where the srews are, and between the metal and center pin,
good luck
I ended up throwing it out but I think I figured it to using a different whip than the one it came with (was using a shorter Wilson whip I cut down for 28.400..but the base of the antenna that came with the sirio is maybe a 32nd thicker at the base than the Wilson and therefore the rubber fitting did not seal it around the whip letting water in after a few days of rain..at least in theory it sounds good..