here is the problem im haveing .. the ant. is a laser 400 the coax is lmr 400 gamma m are 10.000w when i get the swr down on the flat side the last strap that holds the gamma rod to the element is right up net to the capacitor..the big white insulator .... will this hurt anything??? when i had the 213 on there they both tuned fine 1.1 or 1.2 why is that??? thanks for any help... showtime in ga..
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swr on laser
- Thread starter 2112
- Start date
You are making the SWR measurement at the antenna feedpoint, right? Otherwise, you will need a multiple of electrical 1/2 wave for your coax to properly set the gamma match.
Rich
Rich
if your not running 10kw get a lower rated gamma or switdh to a beta matching system.
what they ware saying is. if your trying to tune your antenna and not checking the swr at teh feedpoint of the antenna. then you need to use electrical 1/2 wave lengths of coax to get a correct reading. then once its set you can use what ever length it takes to make it from antenna to your rig.
what they ware saying is. if your trying to tune your antenna and not checking the swr at teh feedpoint of the antenna. then you need to use electrical 1/2 wave lengths of coax to get a correct reading. then once its set you can use what ever length it takes to make it from antenna to your rig.
oh ok i would double check your pl-259's. i like 213. they say the lmr400 is better. so in your case it has to be either like you said the antenna is to low or bad conections on the pl-259's.
ive read several places that if your beam is not above 1 wave length you will have alot of loss.
was your antenna alot higher before this coax change ??
ive read several places that if your beam is not above 1 wave length you will have alot of loss.
was your antenna alot higher before this coax change ??
oh ya cuse of the gamma on the end duhhh me.
well i would try to raise ir up were the botom of the elemnts are at least 15 feet off the ground. just to check that your not getting a fasle reading.
well i would try to raise ir up were the botom of the elemnts are at least 15 feet off the ground. just to check that your not getting a fasle reading.