"Floyd Sense" <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Here's something I'm currently using with my TR-7 that I think would be
useful to other TR-7 owners. I operate all the bands from 160 through 10
with the TR-7, so need a preamp for the Beverage antenna on 160, and could
also use a bit more receive gain on the higher bands. I already had a
preamp for 160 and 80, and a PTT controlled relay box for disconnecting the
Beverage on transmit (to protect the preamp). A month or two ago I stumbled
across a CQ ad for J-Tec that described a combined preamp/receive antenna
switch and decided to give it a try. Here's the link to the description:
(http://www.j-tecradio.com/index.html?engasap_2).
It turns out this device is well suited for use with the TR-7 since it
allows the preamp to be used with the receive antennas or the transmit
antenna, and it includes switching to protect the preamp during transmit
when using a separate receive antenna. The preamp can be switched in or out
of the line, or you can switch in a 20dB attenuator when needed on 40 or 80.
It requires a connection to your transceiver PTT line and is designed to be
inserted between the transceiver and antenna (or linear amp). I currently
have it inserted in the receive-only antenna loop on the rear of the TR-7.
The broadband preamp uses a 2N5109 for good intermod performance and low
noise figure. Probably not the best arrangement if you live in an area of
strong nearby stations, but out here in the boondocks it functions just
fine. The preamp sure made a difference on the few 12 meter signals that
were coming through today.
73 and Happy New Year
Floyd - K8AC
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