[TowerTalk] Heliax question

[dj7ww at t-online.de]

Hi Stan,.

I never saw 7/8" Heliax or Cellflex with solid inner conductor.

The 5/8" Heliflex ( old name Flexwell) by RFS which should be equivalent to 4.5-50 has different measurements but is air dielcric:

Technical Data Sheet
FLEXWELL Air Dielectric Cable
HF 5/8" Cu2Y - 50 Ohm
HF 5/8" CuH - 50 Ohm

Structure
Inner conductor:	Copper wire	6.3 mm
Dielectric:	High density polyethylene helix	13.6 mm
Outer conductor:	Corrugated copper tube	18.9 mm
Jacket:	Polyethylene, black	22.3 mm

73
Peter, DJ7WW



-----Original-Nachricht-----
Betreff: Re: [TowerTalk] Heliax question
Datum: 2024-10-05T12:28:37+0200
Von: "Stan Stockton" <wa5rtg at gmail.com>
An: "dj7ww at t-online.de" <dj7ww at t-online.de>

Thanks for the information, Peter. I appreciate you trying to figure it out.

LDF4.5-50 has a diameter over dielectric of .71 inches and the inner conductor is .28 inches. I don’t have anything that small.  I am positive the other coax I have is 7/8” Andrew Heliax.  This one I haven’t been able to identify is (as closely as I can measure with a tape measure) 1/8” larger over the dielectric than the 7/8”.  Just looking at the ends of them side by side one is visibly larger.

Right now I would be happy to find a part number for 7/8” Heliax with a solid center conductor or connector for same to see if I could make it work.

Stan

> On Oct 5, 2024, at 4:30 AM, dj7ww at t-online.de wrote:
> 
> HF 5/8" Cu2Y - 50 Ohm air dielectric cable has 22.3 jacket diameter, the solid inner conductor is 6.3mm diameter.
> 7/8" Cellflex cable or LDF5-50 has about 1.1" outside diameter, not 7/8"
> 
> Your other cable might be LDF4.5-50
> 
> 73
> Peter, DJ7WW
> 
> 
> -----Original-Nachricht-----
> Betreff: [TowerTalk] Heliax question
> Datum: 2024-10-05T10:51:12+0200
> Von: "Stan Stockton" <wa5rtg at gmail.com>
> An: "TowerTalk at contesting.com" <TowerTalk at contesting.com>
> 
> In all my stuff I have about a 175 foot length of Heliax that measures 1 inch in diameter as opposed to the 7/8 inch measurement on the 7/8” Heliax I have.  I thought it could be that it is 7/8” that has swelled somehow, but it looks like new when I cut off the jacket.
> 
> The center conductor is solid - not tubular.  I cannot read any writing on it to know what the part number might be, nor have I been able to find anything on Google or ChatGpt.  
> 
> Do you know what I might have (part number) and where I could find a couple of connectors?
> 
> Thanks…Stan, K5GO
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