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November 10th 03, 02:01 AM

On 09 Nov 2003 18:12:36 GMT, (Avery Fineman)
wrote:

The old "UHF" connectors (SO-, PL- numbers) common on amateur
HF and low-VHF equipment were obsolete for new designs a half
century ago. Those are cheap because there isn't much QC on
them and the tolerances are sloppy in comparison.

It is good for many purposes, even up to 432MHz - in spite of what
somebody says. In the local radio club the problem is that they don't
like to solder and even SO239/PL259 means a great problem. Not to
mention a club which went into a very large scale of antenna
installations for CQ-WW contest last year and discovered that some of
the antennas which were put up few days before didn't work any more

SMAs used with semi-rigid coax are quite easy to make once you
get the hang of it and are incredibly durable physically and in all
kinds of environments. The solid center conductor of the semi-rigid
becomes the "pin" just as in the TV set F connector used with
RG-59 75 Ohm semi-flexible. F connectors are good to 1 GHz
(with some higher VSWR than others) so don't anyone knock the
method. SMAs are dandy to use with stripline in aluminum hog-
out enclosures.

With all the available semi-rigid cables with connectors available as
surplus it has never been neccessary to mount such connectors, got a
few hundred cable connector 10 years ago, but really not needed them,
and I do have 10GHz SSB transverter with SMA connectors

73
Jan-Martin, LA8AK
http://home.online.no/~la8ak/d.htm
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