I had better results with a 160 sloper attached to a 100 foot tower at the
mark than my inverted V at the 90 foot mark. The sloper and inv V were not
the tower at the same time so direct comparison was not possible. I worked
DX (which is my priority) with the sloper. I still work DX on the inv V but
more of struggle than it was with the sloper in general. I put down 32
radials for the sloper which are still down with the inv V up.
I had a sloper at an earlier QTH attached to a crank-up tower that was more
and I would guess was closer in performance to the inv V.
My tower (45G) has a tribander at the 101 foot level and 2 el 40M yagi at
I am going to try loading the tower this Spring thinking it will be better
than the sloper.
I will probbaly add some radials as well to help it out.
73, Larry W6NWS
----- Original Message -----
From: "Stan Stockton" <firstname.lastname@example.org>
Sent: Wednesday, December 29, 2010 7:22 PM
Subject: Re: [TowerTalk] Length of Sloper?
> Quarter wave slopers just don't work well unless there is top loading -
> at least that has been my experience. If I had a 60 foot tower I would
> shunt feed it and use it as a vertical. You will be quite pleased with
> the way it will work with a reasonable ground system under it. I will
> work fine with a small tribander for 80 and 160 so your ground system
> will be good for the future.
> To answer your question, I would be prepared to make it a LOT longer
> than you think it should be. I would start out with about 85 feet of
> wire and fold it back a couple feet at a time to get it in the band
> where you can then finalize it. I think you would be better off with an
> Inverted V at 60 feet and then shunt feed the tower after you get the
> tribander up.
> Stan, K5GO
> ----- Original Message -----
> From: <RLVZ@aol.com>
> To: <email@example.com>
> Sent: Wednesday, December 29, 2010 5:59 PM
> Subject: [TowerTalk] Length of Sloper?
>> Hi Guys,
>> I'm installing an 80-meter Sloper on a self-supporting 60' tower.
>> guys) I don't have a MFJ-259 or other antenna bridge with me so I'd
>> appreciate your thoughts to help get me in the ballpark. The
>> 80-meter Sloper will
>> attach to the tower at the 55' level. Currently there are no other
>> on the 60' tower. A couple questions:
>> 1) With no other antennas on the 60' tower, do you think the length of
>> Sloper wire will be close to the formula 234/freq? Or do you think
>> Sloper will wind up needing to be longer or shorter than 234/freq?
>> 2) The once I get the Sloper tuned for minimum SWR on 80-meters, if I
>> add a Tribander to the top of the tower I'll no doubt need to re-tune
>> Sloper, but do you think the Sloper will need to be shortened or
>> lengthened after the Yagi is added?
>> Thanks & 73,
>> Dick- K9OM
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