[Antennas] Help with TA32 Yagi

[Joe Mayenschein]

I own a TA-33

and had a similar problem, this is back in the early 80's now, but a
phone call to mosley came with the response from one of their tecks was
to change the length of my feedline.  Just put a different length of a
patch cord in the line and see what happens.

I thought at the time the guy was crazy.  but i tried it, I had a longer
patch cord that the one I was using between the TVI filter  so i tried
it and man o man what a difference!

By playing with the length of the feedline I ws able to "Tune" the thing
to a almost flat as in the spec's SWR on all 3 bands.
Try it it doesn't cost much..

Now I have a somewhat off topic question guys,

I'm looking for something I cant seem to find. A larsen 1/4 wave NMO
system where the antenna mount,, (not the part attached to the car the
3/4" hole version)  but the part that mates to it attached to the whip.
All I seem to be able to find are the large plastic mounts. (this is 2
meter setup)  I liked the small very low profile chrome mount.  are they
still available?

If so who has them and what is the exact model number?

Joe WB9SBD
John Geiger wrote:

> 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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