Nope, John, what I have always had has been conductive, but the length I
had before semed to de - tune the antenna, especially on the higher HF
bands, like 10 and 15.
I guess my dilemma is that I'm not sure how to come up with a good
conductive mast that won't de-tune the antenna on certain frequencies, and
not interfere with tuning on the ones I want.
Maybe I have a lot to learn yet, which is why I appreciate this list so
much.
73 from Tom Behler: KB8TYJ
----- Original Message -----
From: "John Miller" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, August 15, 2011 1:48 PM
Subject: Re: Need suggestions for better mast arrangement to safely raise HF
screw-driver antenna on RV
> telescopic would be best I'd say though also you need something conductive
> because it needs the vehicle ground. If you have something nonconductive
> right now, that's your problem.
> ----- Original Message -----
> From: "Tom Behler" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Monday, August 15, 2011 10:00 AM
> Subject: Need suggestions for better mast arrangement to safely raise HF
> screw-driver antenna on RV
>
>
>> Hi, all.
>>
>> Well, I attempted to check into yesterday's 20-meter Cross-Country blind
>> ops
>> net from the RV, but was not successful.
>>
>> I believe my screw-driver antenna simply is not high enough on the back
>> of
>> the RV to allow me to get out well.
>>
>> The antenna is mounted with u-bolts on the back bumpber on a piece of
>> pipe
>> that is probably about thre or four feet high. This gets part of the
>> screwdriver antenna and whip above the roof line of the RV, but it does
>> not
>> get it completely above the roof line by any means. The RV is
>> approximately
>> 12 feet high.
>>
>> Originally, I had used an arrangement with a longer piece of mounting
>> pipe,
>> but it turns out that the pipe was de-tuning the antenna, especially on
>> 10
>> and 15 meters.
>>
>> So, my question is this: Does anyone know of a fiber-glass or other type
>> of
>> non-conductive mast that I might try to get the screw-driver up higher?
>> Obviously, I want to be safe here, and don't want to have to mess with
>> guys.
>>
>> Something telescopic might be the best, but again, I would think it would
>> have to be of fairly high quality.
>>
>> If anyone has any suggestions, I'll save them for future reference.
>>
>> Due to a number of other things going on right now that will put a crimp
>> in
>> the budget, I probably won't be able to do anything until next year's
>> camping season, but it's always good to start thinking and planning in
>> advance.
>>
>> 73 from Tom Behler: KB8TYJ
>
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