Gary Andrew makes UHF female connectors for 1/2 LDF. If you use male male
jumpers at the top and bottom you can avoid the adapter issues.
The old part number is L44U...there may be a new number in recent years...not
sure what it is today. RF parts has a replacement..p/n RFU 520 H1.
Cecil
K5DL
Sent from my iPad
On Apr 24, 2013, at 11:37 AM, GARY HUBER <glhuber@msn.com> wrote:
> As I consider the materials required to replace my 30 year old tower, rotor,
> antenna and cables, I have several like new runs on LDF4-50A terminated with
> N-male which could run from my ground window (UHF female) to the top of my 53
> foot tower (60 feet max LDF4-50A cable run) where a flexible low-loss 10
> foot jumper would terminate on a new BN-4000 and new TH-7 tribander. This
> configuration would require the 60 feet max LDF4-50A cable run, two half
> inch N female to UHF male adapters, one UHF double female and 10 feet of high
> quality RG8 cable as the jumper to the BN-4000.
>
> The alternative which I’m leaning towards as it seems less likely to have
> connector/adapter loss and other potential problems is a single run of 75
> feet of LMR-400 with factory terminated PL-259s between the BN-4000 and
> ground window UHF female termination. My current installation is 60 feet of
> RG-9913, a UHF double female adapter and a ten foot RG-8214 jumper.
>
> I know the half inch Andrews Heliax has a much lower loss figure (0.357 db
> per 100 feet at 30MHz) for a given length versus the same length of LMR 400
> (0.7 db per 100 feet at 30MHz) , but I’m thinking those three adapters (six
> connection points for loss) and their potential problems make it a wash or
> maybe the advantage goes to the 75 foot run of LMR-400.
>
> I’d be interested in any comments or experiences you might have on the
> subject.
>
> 73 ES DX,
> Gary -- AB9M
>
>
>
>
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