[BC] BE tuner and such
Ronald J. Dot'o Sr.
ron.doto at comcast.net
Mon Mar 23 19:04:30 CDT 2009
From: "Alan Alsobrook" <radiotech at bellsouth.net>
>
> If it's working some times that's best, other times it's not. It
> would be nice to know the exact cause of the error. My B. Point that
> got lost was that a transformation is occurring somewhere between
> the ATU and the transmitter. This could be caused by wrong impedance
> coax, bad coax, or undersized coax (Like RG-8 trying to take 1 KW).
Both TX's and the ATU input from the antenna switch are foam filled 50
ohm heliax, I think it's 3/4" line. As Burt mentioned the connections
to the antenna switch and the switch itself could cause the path to
vary from 50 ohms. I wonder if reading backwards from the ATU end of
the coax through the switch to the TX output would tell me anything,
or just reading into the TX output, or maybe both to see what the
differences would be. It would be interesting but hard to justify the
downtime to the boss, not to mention the setup chores to use the
bridge.
Ron D
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