What was the orientation of the antenna for VSWR testing? Resting that
antenna with the reflector on the ground and pointing the
antenna straight-up is perfectly adaquate for testing purposes, although not as
ideal as a free-space measurement. With the
TA-33-JR's direct feed, there's not much that can go wrong. Since the antenna
is 1:1 on 20-meters, I suspect the four driven
element insulators are fine. It would be worth inspecting the driven element
traps for signs of excessive heat or some form of
contamination. In the early '70s, this happened to me when I ran 500-watts
into this antenna, melted the traps, and an upgrade to
the Mosley "MP" driven element was warranted. While you're at it, ensure that
the moisture drip holes are all pointing downward on
all six traps.
-Paul, W9AC
----- Original Message -----
From: "Dennis Brickey" <n4dd@preferred.com>
To: <towertalk@contesting.com>
Sent: Friday, January 04, 2002 4:09 PM
Subject: [TowerTalk] Mosley TA-33 JR SWR question
>
> Hey Guys,
>
> I have attempted to refurb an old TA-33-JR, and today I finally took the
> antenna up
> the house for a test run The SWR on 20 meters was 1:1. 10 and 15 meter SWR
> were high to the tune of 2.5:1. I remeasured the antenna and the
> measurements
> are perfect. I wound a coax balun (6-7 turns, approx 8 feet coax) What's up
> with 10
> and 15 meters? I'm all ears....er eh....all eyes...Thanks in advance for
> the input!
>
> Best Regards,
>
> Dennis/N4DD
>
>
>
>
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________________________________________________________________________
This list is sponsored by the new eHam.net Store. When you buy products
like ICE filters, Array Solutions StackMatch, or M-Squared Antennas from
the eHam Store for the same price you pay direct, a portion of the sale
price goes to support this list. Check it out at http://www.eham.net.
-----
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