That's quite a device. Hopefully I can extract what I need from your
schematic. It looks like I'll use LPT pin #14 and copy that part of the
circuit to control a DPDT relay. Thanks for the info.
John
http://www.qsl.net/kk9a
-----Original Message-----
From: Bob Naumann - N5NJ
To: ct-user@contesting.com
Sent: 5/10/2002 9:52 PM
Subject: Re: [ct-user] Auto Mic switching
I have a schematic for such a device posted on my website at
http://www.qsl.net/n5nj/products/so2r-1.html
I do not offer these for sale, but you are welcome to use the schematic
and
build your own. Most of the parts are stock radio shack parts.
In commercial products, I would recommend the WX0B Arraysolutions SO2R
box.
73,
Bob N5NJ
----- Original Message -----
From: <kk9a@arrl.net>
To: <ct-user@contesting.com>
Sent: Friday, May 10, 2002 9:39 PM
Subject: [ct-user] Auto Mic switching
> I would like to switch a microphone/keyer relay through my parallel
port
> when operating SO2R. In other words, when I'm logging on radio 1, I'd
like
> the mic on radio 1 and when I switch, using alt "." , to radio 2 I'd
like
> the mic to also switch automatically. In searching through the
archives I
> found that pin 16 of LPT1 or LPT2 is used for radio switching. Does
someone
> have a simple sketch of a circuit that I can use to build an
autoswitching
> device?
>
> 73,
> John
>
>
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