ORIGINAL MESSAGE:
On Sun, 8 Aug 2010 07:47:01 EDT, SECOPSYS@aol.com wrote:
>
>Right now my Array Solutions Stackmatch has a bad relay (dirty?).
>Symptom is occasional high SWR and a lack of received signal on the
>lower antenna in my tribander stack. If I send a little high power RF
>through it things are then fine.
REPLY:
A bad solder joint will cause those symptoms too. Check your coax
connectors. Solder has little tolerance for vibration and can break
loose after a while up in the air. Like you say, a burst of RF will
"heal" it for a while, but it always comes back. The center pin of a
PL-259 seems to be a weak point.
As much as possible I try to avoid coax connectors where vibration is
inevitable. On my yagis, which seem to all have coax connectors
regardless of manufacturer, I hard wire the coax around them and tape
the coax rigidly in place. Works fine. Same with dipoles.
73, Bill W6WRT
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