Kelly:
Kelly maybe you must doble check the Coils in the
elements,
how much is the swr increase ?? a few or just to the
infinity ?
i read several time the problem in the tribanders and
some monoband antennas from cushcraft
good luck and Happy New Year
--- Kelly Jones <kelly@dxcentral.com> wrote:
> Hi TTers,
>
> I have a Cushcraft XM240 that I think has developed
> an intermittent loose
> connection. I bought this antenna used and put it
> up this past fall. What
> I noticed is that the person that owned it before me
> must have used some
> type of "goop" inside the element tubings. The only
> thing I can assume is
> that it was some type of stuff to keep the tubing
> joints in good contact
> with each other. On the joints I took apart, I
> completely cleaned the
> outside of each smaller tube as it slid into the
> other. However, I had a
> difficult time cleaning the inside of the larger
> tube that the smaller slid
> into. This was some really nasty stuff and took a
> boat load of elbow
> grease and sandpaper (yes, sandpaper) to get the
> elements cleaned up. This
> stuff was really sticky and had all kinds of crud
> that have accumulated
> over time. The stickiness is what caused me the
> most problem with getting
> inside the tubes. Steel wool, fine grit sandpaper,
> etc. all would just go
> in and stick, probably causing more bad than good.
>
> Well, needless to say I think some of that junk is
> now causing me
> problems. I seem to have an intermittent where my
> SWR will go high, then
> back to normal, then high, etc. I'm suspecting that
> there is an element
> that has a piece of tubing that's not making good
> contact at one of the
> joints. So my question is, does anybody have a way
> to clean out the
> insides of the tubing sections. I'm obviously going
> to have to take the
> antenna down to fix it (in the middle of the
> Colorado winter!) and I want
> to be sure I don't have to do this again.
>
> Also, I seem to recall some talk flying around with
> regards grounding the
> reflector to the boom with a strap. Can somebody
> point out the reason for
> this? And finally, what's the consensus of using an
> MFJ86 (or whatever the
> number is) balun versus a coax wound balun? I have
> an older W2AU (I think)
> balun that I'm toying with replacing the MFJ with,
> but am now thinking
> about just making a coax one. Thoughts on this?
>
>
> 73
> Kelly - N0VD
>
>
> _______________________________________________
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Hector Garcia XE2K / XF1K
Mexicali B.C DM22
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