When comparing similar size cables or connectors, the one with the smaller
inner diameter will be the highest impedance.
73, Charlie k3ICH
----- Original Message -----
From: "George Danner" <gdan...@windstream.net>
To: <elecraft@mailman.qth.net>
Sent: Wednesday, November 20, 2013 8:34 AM
Subject: Re: [Elecraft] P3 Loss of signal
Bill,
Another issue with BNC connectors to take into account is that 50 ohm & 75
ohm BNC male connectors have a very slightly different diameter on the
male
center pin. The larger one (don't remember which one) can expand the
female
center socket. If you switch to the smaller version male after using the
larger one, you may get an intermittent connection. You can tighten the
female with a dental pick.
We mixed connectors when TV stations switched from UHF to BNC for video.
We
found this issue years later! All BNC males are not the same. I make sure
to
use 50 ohm BNC connectors in the ham station for this reason.
73
George
AI4VZ
--------------------------------------------------
From: "Bill W" <bw39...@yahoo.com>
Sent: Tuesday, November 19, 2013 9:56 PM
To: <elecraft@mailman.qth.net>
Subject: Re: [Elecraft] P3 Loss of signal
Hi Don,
Thanks for the reply. Yes that crossed my mind but the cable I use now was
suppose to be from the "new" batch. I called and got replacement from
Elecraft Parts after earlier problem. I think this cable has been in use
for
better than a year or more and nothing has changed. I will switch cables
as
soon as I can find or make a new one. I was just curious if anyone else
had
a similar problem crop up.
Thanks again,
Bill - W0BBI
--
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