Jim,
Is absolutely correct.. I have several of them.
mike
K5JMP
-----Original Message-----
From: Jim B. [mailto:[EMAIL PROTECTED]
Sent: Wednesday, April 06, 2005 11:16 AM
To: [email protected]
Subject: Re: [Repeater-Builder] Andrew Heliax LDF1-50
Glenn Little WB4UIV wrote:
> What shape is the melted dielectric in after you get finished with the
heat
> to solder the copper jacket of the hardline to the adapter?
>
> When the center conductor moved when the dielectric melted, the cable
> impedance also changed. When you melted the foam dielectric, you also
> changed the velocity factor of the cable.
>
> If the adapter bottoms out against the connector, you can pass the
hardline
> through the adapter and flare the corrugated shield so that it is
> compressed by screwing the adapter in. This would preserve the impedance
> and velocity factor of the cable.
>
> 73
> Glenn
>
FWIW-the Andrew-supplied connector for FSJ-1 (1/4" superflex) has two
holes on the reducer, otherwise it is virtually identical to what Joe is
using. And you do solder it on.
Yes, you do have to be careful the center doesn't migrate.
--
Jim Barbour
WD8CHL
>
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