[SOC] FSK input on my rig...

[Bob Nielsen]

Rob,

I suspect that input will cause the carrier to shift from mark to space
if grounded.  You could probably use a transistor switch driven by a
serial port, but you might need to write your own software to drive
that.  Back around 1968 or so I had a model 15 teletype which I used
with a varicap in the oscillator of the ARC-5 I used as a VFO for my
Eico xtal-controlled transmitter. Ah, the memories....

I've heard of people rewiring the diode switches in some of the rigs
with a FSK position on the mode switch so that it would instead use LSB
with the narrow filter.

On Sun, May 19, 2002 at 12:31:59PM -0500, Rob Matherly wrote:
> My rig's got a FSK input deal on the back for a teletype machine.  Is there anyway to
> plug my computer into that?  It's got an FSK position (duh) on the mode switch, I've
> put it there and the mike doesn't do anything so just doing a super-simple gee-whiz
> connection to the mike input is a no-go :^)  (Reason for wanting to use the FSK
> position is it has a RTTY filter in it that only works in that mode)
> 
> Also, I need to get something setup to run PSK-31, SSTV, etc. from the soundcard.
> Can anyone point me to some plans to rig up a switch to go back and forth between my
> mike and the soundcard?  I know that should be simple to figure out by myself, but I
> figure I'll see what others have done first :^)

MFJ and some other place sell such a device for ~$90.  I but you can
make one for MUCH less.

73,
Bob, N7XY
SOC #77

-- 
Bob Nielsen, N7XY                          nielsen@oz.net
Bainbridge Island, WA                      http://www.oz.net/~nielsen
IOTA NA-065, USI WA-028S