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Re: [TowerTalk] KF4BWG

To: towertalk@contesting.com
Subject: Re: [TowerTalk] KF4BWG
From: Grant Saviers <grants2@pacbell.net>
Date: Thu, 18 Apr 2019 19:04:04 -0700
List-post: <mailto:towertalk@contesting.com>
Now and then I've seen commercial multiband ribbon cable designs. I think PVC ribbon cable will have a very brief life in sunlight. With very close spaced conductors I think it is hard to get the broadbanding to work well.

One cable that did work a bit for me was to use the Al shield of scrap or reel ends of 3/4" CATV bare hardline to make an 80m dipole. Simple, strong, no loss, and about 2x the bandwidth of 14ga Cu IIRC. I used brass ferrule tubing fittings to make mechanically strong and good RF feedpoint connections.

IMO the simplest near full band 80m dipole/V antenna is made with the 75 ohm matching section several folks have described. However, it needs to be modeled for the height above ground. See AC6LA AutoEZ examples Part 5.

Grant KZ1W

On 4/18/2019 15:23 PM, jimlux wrote:
On 4/18/19 2:45 PM, Joe Partlow wrote:
Has anyone ever considered using computer ribbon cable to make a broadband
dipole?


If it's cheap (free), why not.   I don't know that it would work any better than two parallel AWG 14 wires spaced the width of the cable.

One could make a very interesting fan, too..



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