Subj : Re: Packet BBS?
To   : echicken
From : Ed Vance
Date : Tue Oct 08 2024 09:15 am



> My setup for RTTY used a Demodulator circuit that was shown in the schematic
> for a RTTY Reader article in Popular Electronics Magazine, I used the
> headphone out jack on my 2M and on the HF rig(s) whichever one I was using at
> the time (had 10 Turn Potentiometers for adjusting Mark and Space tones for
> what rig was being used).

> The Auto Frequency Shift Keyer was a 555 IC with two Pots for setting Mark
> and Space Tones. Each Pot was connected to one of a resistor in the 555
> circuit.
> A friend told me over the phone how to modify the standard 555 circuit to get
> it to switch tones. Output of the 555 went to the Mike jack of the rig being
> used 

> They were connected to a Netronics RTTY/ASCII Video board to a TV set through
> a RF Modulator so I could see what was Received.
> A Netronics ASCII Keyboard I used for typing messages.

> I also used a Cassette Tape Recorder to Save QSO's, and to sometimes play
> back the QSO through the Mike jack, if I wanted another Ham to see what I
> saved. Such as ARRL RTTY Broadcast I heard on the HF rig to pass it on the 2M
> RTTY Net.

> Still have it, but no 2M rig now, and no antenna connection to the HF rig.
> BTW the HF setup was done using SSB mode.
> Ed

Above where I wrote Auto, I meant to type Audio as in Audio Frequency Shift
Keyer AFSK.
Ed W9ODR K
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