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@gmail.com>
An: "dj7ww@t-online.de" <dj7ww@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@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@gmail.com>
> An: "TowerTalk@contesting.com" <TowerTalk@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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