[WriteLog] Transistor interface

[WA9ALS - John]

I have 2 transistor interfaces like you describe built into a box with
stereo 1/8 inch jacks on the input and output side of each.  Sometimes I use
them for PTT/FSK and sometimes for PTT/CW, giving me some flexibility.

For PTT/FSK, the wires come from the RTS and TxD pins of the computer's com
port and go to the appropriate connectors on the rig.  For PTT/CW, the wires
come from RTS and DTR, respectively and go to the appropriate rig connectors
for the desired function.

For a multi-2 RTTY op, I use one interface for each station to handle
PTT/FSK.

The rest of the time I have one of the interfaces hooked to a com port for
PTT/FSK for RTTY and the other one hooked to another com port for PTT/CW.
That way I'm ready for anything!  HI

I don't know anything about the TS2000 - It surely has some sort of ACC
connectors for PTT and FSK?  I don't see why you should have to get into
taking cables off the CAT connector - leave that for rig control
(read/change freq +/- PTT).  In general though, you can certainly use a
transistor switch to do PTT, FSK, and/or CW.

----- Original Message -----
From: "Mark and Beth Mowery" <mowery@shianet.org>
To: "Writelog mailing list" <writelog@contesting.com>
Sent: Monday, January 07, 2002 6:14 PM
Subject: [WriteLog] Transistor interface


> I've seen some mention of a transistor interface for running MMTTY in FSK
> mode on a COM port.  Tried to do this in the RTTY RU with my TS2000,  but
> this radio takes FSK input on an accessory (DIN) connector, not the COM
> port.
>
> I do have a simple CW interface (1 transistor, 1 resistor) built into a
DB9
> that I use on my radio's rig control COM port.  In my case,  I had to
bring
> the appropriate wires out of the DB9 connector at the radio end and put
the
> right connector on it to plug into the radio's key jack, as the pins used
> for CW have no internal connection in the radio at the COM port.
>
> So here's the question, finally.  Would this same setup work for FSK, if I
> had the correct DIN connector on the radio end rather than the 1/8 plug
used
> for CW?   Hallelujah!  Can it really be that simple????
>
> Mark AA8TC
> http://www.qrz.com/callsign.html?callsign=aa8tc
>
>
>
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