[GreenKeys] ITTY audio into TU

[Kevin Phillips]

You might check what type of plug the FSK 500 takes, whether it is 
2-conductor or 3-conductor, or which jack it is plugged into if there 
are two choices.  I had the same issue with a FSK 1000.  It takes a 
2-conductor and I was using a 3-conductor plug which was essentially 
grounding the ITTY signal.


73

Kevin

W5TTY

On 8/30/2024 11:04 PM, Jomar Quilatan wrote:
> Hi all,
>
> Another newbie question I suppose...
>
> I've got my Model 26 hooked up to the FSK 500 and the "transmit" marks 
> and spaces are showing up well.  Otherwise, it stays in Mark mode - 
> even with the audio plugged in, the marks and spaces are not being 
> picked up.
>
> I have the ITTY feed playing through a cell phone plugged directly 
> in.  Is there a need to amplify the input signal for the TU to pick up 
> the frequencies, or should that direct plugging in suffice (of course, 
> with reasonable volume from the phone)?  Otherwise I'm inclined to 
> think that my TU is stuck in a "transmit" mode, even though it is 
> configured to "receive" as per the documentation.
>
> Looking forward to your input - thanks in advance!
> Regards,
>
> (- the M26 and Teletype newbie)
>
> *Jomar (Joshua Martin) Quilatan*
> Mississauga (Toronto), Canada
> RA 0-8045
>
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