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[Towertalk] Intermitant high SWR

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Subject: [Towertalk] Intermitant high SWR
From: (Joe Reisert)
Date: Tue, 06 Aug 2002 14:22:48 -0400

Yes, it's more than likely the traps that are causing the intermittent. The 
screws holding the can and the coil wires loosen up or sometimes oxidize! 
Less likely, but still a problem is that sometimes the insulation breaks 
down between coil turns and they can short together.

GL and 73,

Joe, W1JR

At 12:26 PM 8/3/2002 -0700, BILL STRAW wrote:
>   I have a 10/15/20 rotatable dipole, actually the
>driven element from an old Cushcraft A3. It has
>worked fine for a long time, but now on 15M the SWR
>is high (3:1) until I apply power, then the SWR comes
>down to (1:1) and the signals sound fine. After a few
>seconds the signals get weak, and applying power
>reveals a high SWR again, which goes back to 1:1 with
>the power having been applied. 10 and 20 are not
>affected. Is this a trap going bad or a poor
>73, Bill WB0O
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