For anyone considering either of these two vendors for a jumper cable
fabricator, I can give my feedback on their initial performance. After
issuing a specification for my cable to both via email, I got a terse reply
back from Tally. I then asked how to get the project going, and no response.
Issuing the same spec to Tessco, they set me up with an account, and have
promptly issued a quote, which I have accepted.
The only downside to Tessco so far, is they were unable to perform a
pressurized leakage test. I'll be anxious to see the finished jumper...
-Doug Ronald, W6DSR
-----Original Message-----
From: Jim W7RY [mailto:jimw7ry@gmail.com]
Sent: Tuesday, June 12, 2018 17:07
To: Doug Ronald, W6DSR <Doug@DougRonald.com>; 'towertalk'
<towertalk@contesting.com>
Subject: Re: [TowerTalk] Connector on 7/8 Heliax
Tessco provides made up Heliax assemblies.
www.tessco.com
There is also Tally. www.tallycom.com
Thanks
73
Jim W7RY
-----Original Message-----
From: Doug Ronald, W6DSR
Sent: Tuesday, June 12, 2018 6:50 PM
To: 'towertalk'
Subject: Re: [TowerTalk] Connector on 7/8 Heliax
Air because the antenna's 1 5/8 EIA transmission line is pressurized. I
already have the nitrogen setup for that outdoors at the antenna's base, but
I can put the tank inside where it belongs if I have pressurized helix as
well.
Actually if I buy a ready-made cable, I'll have a 1 5/8 EIA flange on one
end, and a 7/16 DIN into the shack on the other. Then I can get rid of the
EIA-to-N adapter at the antenna base.
We're just talking HF. The antenna is rated 3 -- 30 MHz. I want low loss
transmission line to maintain my hard-fought noise figure at the upper end
toward 30 MHz. Since I'm on solar power, I'll be lucky to even get 1500
Watts out, but the EIA stuff is the way the antenna came, and I'm stuck with
it.
So you guys have any suggestions on a good place to pick for the
transmission line? I see Commscope, maybe RFParts, Pasternack, but what
others are out there?
Thanks for responding,
-Doug
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Jim
W7RY
Sent: Tuesday, June 12, 2018 03:54 PM
To: towertalk <towertalk@contesting.com>; Steve Maki <lists@oakcom.org>
Subject: Re: [TowerTalk] Connector on 7/8 Heliax
My question as well.
You WILL have to pressurize it. How long a run at what frequency are we
talking about here Doug?
Thanks
73
Jim W7RY
-----Original Message-----
From: Steve Maki
Sent: Tuesday, June 12, 2018 5:08 PM
To: towertalk
Subject: Re: [TowerTalk] Connector on 7/8 Heliax
Why are you leaning toward air cable? What's your application?
-Steve K8LX
On 06/12/18 16:42 PM, Doug Ronald, W6DSR wrote:
> Well, okay, if I have to start from scratch, I'm looking at
> Commscope's
> HJ5-50 7/8" heliax or something equivalent. Since I'll be ordering a
> custom setup, I might as well upgrade to 7/16 DIN connectors.
>
> So my new question is what vendor do the folks here recommend to make
> up my custom cable?
>
> Thanks,
> W6DSR
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