[DX] Help with TA32 Yagi

[John Geiger]

Hope this is appropriate, as it is my DX antenna!!

I bought a used Mosley TA32 2 element yagi to replace
my MA5B.  Figured a full size antenna would be better
than the mini yagi.  This is the older Mosley antenna,
not the current one.  It arrived yesterday, and I
assembled it, borrowed an AEA antenna analyzer, and
everything looked good.  The SWR was decent on each
band when the antenna was on the ground pointing
straight up.

Here is the next order of events:

1. mounted antenna on tripod mast on roof-SWR still
good on each band according to antenna analyzer.

2. Checked SWR with TS2000, still looked pretty good.

3. Finished mounting antenna-tightening all bolts,
positioning,etc.-when SWR was checked again with
TS2000-not very good.

4. Went back on roof this AM to check with analyzer,
as I had done in #1-not good again.

I get a fine SWR on 10 meters, on 20 it is resonent
about 1 mhz low.  On 15 it is also resonent very low,
but never a really below 1.5 to 1 or so.

SO what is going on?  How can it change so much in
performance from #1 to #4?  I took the antenna down,
and measured it again with the analyzer when it was on
the ground pointing up, as I originally did.  Still no
luck on 15, and a little better on 20.  I do have a 2
meter antenna mounted about 6 feet above where the
TA32 was, but that never affected the MA5B, and it did
not affect the TA32 at first.

Here are some questions I now have:

1. did I burn a trap out when I ran the 100 watts from
the TS2000 through it the first time?
2. If I did burn out a trap, would it still work ok on
10 like it does?
3. how do I figure out which trap is bad?

Any other help on this antenna.  It will work on 10
which is better than the dipole I also have, but for
the same size I can get a 10 meter monobander which
will work even better-if I cannot get it going on 15
and 20.

73s John NE0P

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