Alan,
What do you want tot achieve by making radio B unable to receive when radio
A is transmitting?
This is an absolute must in SO2R operation, you want to listen on another
band for QSO's or Mults
with radio B... you'd better protect it's front end with filters and stubs
imho.
73 Gert, PA3AAV
----- Original Message -----
From: "Allan Taylor" <k7gt.cw@gmail.com>
To: <tentec@contesting.com>
Sent: Sunday, December 13, 2009 8:26 PM
Subject: [TenTec] OmniVI: question about T/R control logic
>I now have a pair of OmniVIs and would like to use them in a sort of
> poor-man's SO2R. Actually I
> believe what I want to do is called SO2V but will actually be with two
> radios. What I would like to do
> is to have both radios functional on receive, and have the alternate
> radio's (radio B) T/R PIN diode switch activated when the primary
> radio(radio A) is transmitting, thus protecting the front end of the
> alternate radio (radio B). Thus the question: Does the PIN diode
> switch activate a) when the key is pressed/entered, b) when the signal
> from the QSK loop / amp is returned, or c) at some other time. The
> easiest solution would be to use radio A's QSK loop in some way to
> activate radio B's T/R PIN switch. As the control logic is inside a
> chip rather than in hardware, staring at the schematic does no good.
>
> Any takers for this question??
>
> --
> 73 Allan K7GT
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