Bob,
We didn't think about using ladder line, but that is a good idea. Another
possibility would be those "Ladder Snap" spreaders you can buy for home-brew
600 ohm ladder line. I may have to experiment with one some time soon.
73 - Eric
W9WLW
Sent from my iPad
> On May 24, 2014, at 6:58 PM, "Bob McGraw - K4TAX" <RMcGraw@Blomand.net> wrote:
>
> I built mine using some 450 ohm window line, the vinyl covered material. Just
> make it the length for the lowest frequency, 130 ft for 80M and put a center
> insulator. Then for one conductor cut it for the lowest frequency for 40M
> being about 65 ft. Yes, the velocity factor does have a wee bit of
> influence. At the end of the 40M section cut about 6" of the conductor out
> leaving the rest for the full length. Then cut about 6" to 12" off of the
> same conductor at the end for attaching the end insulator. In my case I use
> the special designed insulator suited for clamping the flat vinyl line at the
> center and the ends. Leaving the wire in place makes it a wee bit stronger.
> In the air it looks like a folded dipole made from window line.
>
> It can be fed in the center with balanced feed of your choice or with a 1:1
> current balun and very low loss coax.
>
> 73
> Bob, K4TAX
>
>
>
>
> ----- Original Message ----- From: "R. Eric Sluder - W9WLW"
> <resluder@yahoo.com>
> To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>; "Bob McGraw -
> K4TAX" <RMcGraw@Blomand.net>
> Sent: Saturday, May 24, 2014 4:40 PM
> Subject: Re: [TenTec] The Next Flagship
>
>
> KK9V and I came in 1st place for the VE5 section on Field Day back in the
> very early 90's using that exact antenna Bob. We operated from a tent with
> the fan dipole high up in the trees located in Moose Jaw provincial park.
> What a great time.
>
> Its a good antenna config, but the wires are seldom straight and it ain't
> pretty to a non-ham. :-( I tried to install that same antenna about 3 years
> later at the QTH and the XYL wasn't keen on its looks.
>
> Eric
> W9WLW
>
> On May 24, 2014 4:55:06 PM EDT, Bob McGraw - K4TAX <RMcGraw@Blomand.net>
> wrote:
> |In practice, a 2 wire dipole works 5 bands. Cut for 80M, harmonically
> |works
> |on 20M and 10M. Then add the second wire fed parallel being cut for
> |40M
> |works harmonically on 15M.
> |
> |A better choice, space permitting, cut for 160M will work 40M and 15M
> |and
> |the 2nd wire cut for 80M will work for 20M and 10M. Here we have 2
> |wires/dipoles fed parallel that work 6 bands.
> |
> |
> |In both cases it is better to cut to the low end of the band and let
> |the
> |tuner make the radio happy.
> |
> |73
> |Bob, K4TAX
> |
> |
> |
> |
> |----- Original Message ----- |From: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>
> |To: "'Discussion of Ten-Tec Equipment'" <tentec@contesting.com>
> |Sent: Friday, May 23, 2014 3:57 PM
> |Subject: Re: [TenTec] The Next Flagship
> |
> |
> |> Jim, I can't agree. Sorry.
> |> You are not on the same page as I am.
> |> You push a resonant antenna, but that's a monoband antenna.
> |> You sell the "all band dipole" much too short.
> |>
> |> YES you are correct about its many nulls on the high bands. They are
> |> definitely not as bad as you make it out to be.
> |> I've seen your current and past QTH (in Chicago).
> |> You are a lucky man. Compliments for making best use of the space
> |> available
> |> for an antenna farm - especially in Chicago!
> |>
> |> Many people, possibly most, can have just one single antenna at their
> |QTH.
> |> They will never have what you have or have had in the past.
> |> Many use the non-resonant or openwire fed dipole - the one you say is
> |not
> |> a
> |> good antenna.
> |>
> |> You do it a big injustice to say it is a bad antenna.
> |> Many experts, including W1ICP (Lew McCoy) and W4RNL (L.B. Cebik)
> |have
> |> said
> |> "if I could only have just one antenna, it would be the openwire fed
> |> dipole."
> |>
> |> My own experience: go to CQWW DX Contest, "All Time Records" (CW).
> |> Do a search on "DJ0IP".
> |> I'm on the list as an all time record holder (high power assisted) in
> |one
> |> European country, set using this antenna that you claim does not
> |work. My
> |> record has stood for over 20 years. You don't set records with
> |antennas
> |> which do not work.
> |>
> |> So yes, there are lots of better mono-band antennas, but I don't know
> |of
> |> any
> |> multiband antenna that works better.
> |> If you do, PLEASE share it with us. I will gladly be proven wrong in
> |this
> |> case! (hi)
> |>
> |> 73 - Rick, DJ0IP
> |> (Nr. Frankfurt am Main)
> |>
> |>
> |> -----Original Message-----
> |> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Jim
> |Brown
> |> Sent: Friday, May 23, 2014 6:45 PM
> |> To: 'Discussion of Ten-Tec Equipment'
> |> Subject: Re: [TenTec] The Next Flagship
> |>
> |> On 5/23/2014 3:06 AM, Rick - DJ0IP / NJ0IP wrote:
> |>> I agree with all of that, but you leave one point out. "Openwire."
> |>> As you well know, the impedance of an openwire dipole varies from
> |band
> |>> to band and can be all over the map, up to a couple thousand Ohms.
> |>
> |> Rick,
> |>
> |> I didn't leave it out at all -- it's one of the non-resonant antennas
> |I
> |> talked about. This is a lousy antenna, a bad idea. Yes, the Handbook
> |says
> |> it
> |> "works" on all bands. So does a light bulb. That "all band"
> |> dipole has a pattern that varies widely from band to band, with deep
> |nulls
> |> in some directions where there are stations you would like to work.
> |>
> |> The place for antenna match boxes is to make a dipole cut for 80CW
> |work on
> |> the phone band, to load a random long wire that ends in the shack, to
> |> correct for a dipole that isn't quite the right length.
> |>
> |> I'm a big fan of fan dipoles, which are easy to build, which work
> |really
> |> well, and which have very predictable patterns. If you have room for
> |a 20M
> |> dipole, you can hang a 20/15/10 fan. Barry at Hypower Antenna Company
> |
> |> sells
> |> very nice loaded dipoles that also cover 30 and 40 and can fit 80M
> |into
> |> about 100 ft. That was my low band antenna in Chicago. He makes a
> |version
> |> for 160 and 80 with a fan element for 40 that also works very well on
> |30M.
> |>
> |> 73, Jim K9YC
> |> _______________________________________________
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> |
> |
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> --
> Sent from my Android device with K-9 Mail. Please excuse my brevity.
>
>
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