Wed, 20 Dec 2000 18:23:04 -0500
On 20 Dec 2000, at 16:32, Ron D. Rossi wrote:
> There is no connection at the far end of the trap. That is the open end of the
> capacitor. The element, coil, and cap all connect together at the inside end
> of the trap.
>The bandwidth of the 40m add-on is
> not all that large and operating a little out of tune at max power could
> create too high a voltage gradient from the can to the element toward the tip.
> How well in tune is your antenna?
I have one of these antennas too. No problems whatsoever in the 3
4 years since I've had it. I doubt that it is a bandwidth problem,
since 12M and 17M is only 100 KHz wide. My SWR curves (at full
power) are under 1.5:1 at the band edges.
Did you just purchase the Alpha ? Years ago, I just had a SB-200
and a TH6 - everything was fine. Then I bought a Titan and
promptly smoked a spider web or two out of the 15M trap on my
TH6. Next Dayton, I was talking to one of the Hy-gain reps - I told
him that story, and he mentioned to me that the TH6 / TH7 traps are
rated for 4KW, so I could not have blown the trap with the titan -
there had to be some critters in the trap.
Elliot, I don't know what how you built your antenna, but I taped each
trap cap with electrical tape and sealed the tape with clear Krylon.
I also feed it with a Radioworks 4KW balun.
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