[R-390] Broadband RX Loop amplifier for experimentors

[Robert Newberry]

I have one of these in service at my work bench. I use it for testing
receivers after I've completed working on them.

I like it!

N1XBM
Apparare Scientor
Paratus Communicare
Allstar Node # 27086, 41540, 41812, 42086, 42658, 42657
www.radioguysrepeaternetwork.com

On Feb 5, 2017 5:40 PM, "Thomas Frobase" <tfrobase at gmail.com> wrote:

> About 5 years ago I distributed some kits, the kit consisted of two units
> one at the radio the second in an attic or other sheltered place.  The
> second unit contains a phantom powered broadband (HF) differential
> amplifier
> feed by a single 50 ohm coax cable.  The inside unit by the radio connects
> to a nominal 12 volt supply for power injection to the loop amplifier,
> provides an antenna connection to the radio receiver and a third connection
> to the loop amplifier.  The loop amplifier has an internal relay that is
> engaged while 12 volts is available, when power is removed the loop is
> shunted by a neon bulb.  So in essence, when transmitting nearby simply
> remove the 12 to the power injector and the unit is protected.  The power
> injector is also fused.
>
>
>
> I have used the unit pictured in the attached link for over 5 years, it is
> permanently connected to my AFEDRE software defines radio, and sometimes my
> R-390A, due to high noise here it provides access to 80 and 160 meters as
> well as Standard Broadcast.  Rather than resurrecting the kit I have
> decided
> to provide the loop package as a completed and tested package.  I have a
> limited amount of completed units available for shipment.  The link to the
> paper and kit instruction files are http://www.kitparts.com/loop  Please
> contact me off the list for pricing and delivery options, thanks tom, N3LLL
>
>
>
> tfrobase at gmail.com
>
>
>
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