[mythtv-users] Mini Coax connectors
Jay Ashworth
jra at baylink.com
Mon Jun 11 03:16:45 UTC 2012
----- Original Message -----
> From: "Jean-Yves Avenard" <jyavenard at gmail.com>
> On Sunday, 10 June 2012, Mike Perkins wrote:
> > 60's. We were always told to assume a 3db loss for any connector
> > inserted into a test line.
> >
> This is also what I've been told to assume for any adapter added to
> a 75 ohms antenna cable: assume 3db losses
Note that an adapter is *2 connectors*, so one of those things has to be
incorrect, and in fact 3db is a *lot* of loss, I wouldn't expect that from
an adapter even if it was changing the characteristic impedance of the cable.
0.1db is *high*.
And in fact, a couple of hams polled on the topic agree with me, with good
arguments to back them up:
http://forums.qrz.com/showthread.php?297709-RF-connector-adapter-loss
Cheers,
-- jra
--
Jay R. Ashworth Baylink jra at baylink.com
Designer The Things I Think RFC 2100
Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII
St Petersburg FL USA http://photo.imageinc.us +1 727 647 1274
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