[1000mp] RTTY using FSK in Mark V Field

[Mike MacDonald]

I use MMTTY for FSK. I don't have the program in front of me
but there is an option for FSK and of course the COM port.
I used this circuit: http://www.aa5au.com/rttyinterface.html
and set FSK to reverse in the rig menu. If I remember right I
used 2N2222's.

Hope that helps.

Mike WA2E

-----Original Message-----
From: 1000mp-bounces at mailman.qth.net
[mailto:1000mp-bounces at mailman.qth.net]On Behalf Of Vermilyea, John
Sent: Tuesday, September 07, 2004 1:21 PM
To: 1000mp at mailman.qth.net
Subject: [1000mp] RTTY using FSK in Mark V Field


Dear Group,

I am planning to operate RTTY using FSK with a computer and sound card
and would like to know the best way to generate FSK and control the PTT
using the computer's COM port. The program that I will be using, MMTTY,
just has two open collector NPN transistors to generate the Mark and
Space and PTT signals. The manual just shows using a TNC.Has anyone used
this program before and how did they control the transmitter?
John K3YS
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