Having totally struck out raising this topic on Towertalk, I'm bringing
it here in the hopes of getting some solid advice.
I have a 20 dB ARR preamp of the type praised by ON4UN in his book. I
want to use it with a variety of RX antennas - loops, BOGs, etc. - that
have very low output levels. My choice is whether to put it at the
antenna end, incurring the added complexity of sending 12V DC to it via
the coax, or to put it in the shack.
I realize that if this was 2 GHz, there'd be no question where it should
go. But for 160-meter purposes, I don't know. I am wondering if
putting it at the antenna end might enhance directivity, by amplifying
the signals from the directive antenna relative to any pickup on the
350-foot feedline. I will be trying to choke as much common mode
current as possible, at both ends, but am not sure how effective I can be.
On another topic, I am building a hub for BOGs. Rather than switch at
75 ohms and putting a matching transformer on each BOG, I wonder if it
would be feasible/desirable to switch at the high-impedance side and use
a single transformer. It would certainly simplify the hub.
Any advice would be much appreciated.
--
73, Pete N4ZR
The World Contest Station Database, updated daily at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at
reversebeacon.blogspot.com,
spots at telnet.reversebeacon.net, port 7000 and
arcluster.reversebeacon.net, port 7000
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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