[VHFcontesting] Andros 2 piece N connectors

[Jeff Tewksbury]

Russ, N2KG is the President of Andros manufacturing (and a member of the
RVHFG group). He can be reached at:
 russell at androsmfg.com . busy guy... but he may have something he can send
you. I copied him as well....

We use them extensively at the N2PA contest site (& our emergency operations
center)...7-8 minute installation (with the "American Beauty", 500w iron).


 regards..
Jeff
N2JQR

-----Original Message-----
From: vhfcontesting-bounces at contesting.com
[mailto:vhfcontesting-bounces at contesting.com]On Behalf Of Zack Widup
Sent: Tuesday, April 11, 2006 9:02 AM
To: w0eea at sbbco.net
Cc: VHFContesting
Subject: Re: [VHFcontesting] Andros 2 piece N connectors



Are these connectors similar to the two-piece BNC connectors with the
compression-fitting on the shield? I believe Amphenol calls those
Quicktrim (tm).

I have been using those extensively for a while and generally have good
luck with them through 432 MHz using high-quality RG-58 or LMR195.
However, I have never seen any info on exactly how to install them, so
it's been just a guess so far that worked out.  However, I had a few I
got at a hamfest recently where the piece with the center pin didn't
fully seat into the BNC shell, and I had to do some extra manipulation
with the braid to make them work.

Does anyone have a data sheet on how they are supposed to be mounted on
the coax?

The standard N connectors were used on the old C-band TVRO LNA's at
3700-4200 MHz. I always hated putting them on in the field but they
worked just great.

73, Zack W9SZ

On Tue, 11 Apr 2006 w0eea at sbbco.net wrote:

>
> Hi Warren,
>
> Having both questions and reservations about these connectors,  we made
> several cables with various typs of coax and checked them on a network
> analyzer.  Our findings were that up to 2450 MHz they worked well,  being
> indestinguishable from our sample cables with other types of N connectors.
> We were not pleased with the cables using the two piece N connectors at
3450
> Mhz and above for several reasons.  These included non-repeatability of
> readings,  impedence anomolies,  and slightly higher attenuation for a
given
> length cable when compared to properly made cables with Amphenol N
> connectors.  The Amphenols are harder to install properly,  but from 3 GHz
> up the reward the careful user.
>
> 73,
>
> Jim   W0EEA
>

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