Tom,
You must be talking about really old MOT radios as all the recent
stuff use N connectors on the repeaters/base stations and mini-UHF on
mobiles. The HT1250 our company bought had mini-phone to female BNC
adapters for connection of external antennas (HT1250 is a VHF
HT). You may be able to specify UHF when ordering new base/repeaters
but not standard these days.
Ed - KL7UW
30-years as radio tech
15-years mw engineer
------------------------------
Message: 22
Date: Thu, 22 Jul 2010 15:21:20 -0400
From: "Tom W8JI" <
[hidden email]>
Subject: Re: [Elecraft] So-called "UHF" connectors...
To: <
[hidden email]>, "elecraft" <
[hidden email]>
Message-ID: <C410489AB851471EB4F5F1399BE0EED3@tom0c1d32a93f0>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
> inside....but I do think that the issue with standard "mud" type UHFs is
> with the durability of the dielectric, not with the impedance bump, at
> HF and even low VHF frequencies.
That's an accurate statement John. The largest bump I've even measured with
a SO239 PL259 pair was about 1.05:1 at 147 MHz.
The highest SWR with two in tandem, with optimum spacing between bumps to
enhance SWR error, was around 1.1 :1.
Like Motorola and other have done in the past, I think nothing of a few UHF
connectors on 2 meters. Barrel connectors can be a problem at VHF, because
they can have a long mismatch area, but not properly installed UHF pairs or
good short barrels.
That goodness length matters, because look at the horrible mismatches in
wiring inside our radios and tuners.
73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 144-QRT*, 432-100w, 1296-QRT*, 3400-fall 2010
DUBUS Magazine USA Rep
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