At 07:41 PM 10/22/07, you wrote:

> > I'm proposing a novel application of the circulator (an
> > isolator without the dummy load on one port)..
>
>Yes, I know what you're trying to do, and it's nothing new.  UHF Micor
>mobiles have an isolator in the antenna network that routes received RF
>through the isolator to the receiver when the transmitter is not keyed.  I
>forget how the full-duplex Micor med radios were set up; I believe the
>antenna network in those radios was different, maybe somebody else
>remembers.

(rest deleted)

The original med radio manual is on the Micor page at repeater-builder as
a PDF:

 >Emergency Medical Systems Duplex / Repeater UHF Mobile Radio manual
 >supplement     PDF file courtesy of K9ROD
 > <http://www.repeater-builder.com/micor/pdf/micor-ems-uhf-manual.pdf>
 >This is the no-longer-available manual supplement for the full-duplex
 >dual-receiver repeating ambulance radio model Q2033 and Q1853.   Note
 >that you need the regular UHF mobile manual 68-81015E70 to go along with it.
 >Note this is a 16.6 MB file


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