[Yaesu] FL-101 FSK Keying Query

[Dave Edwards]

Unless the FL-101 does things differently, I would suspect it is a standard 
FSK input.  Using it, you are not using an audio tone input. The rig is 
transmitting a key-down carrier, and shorting that FSK connector shifts the 
frequency of the carrier. Back before PC's and their audio output 
connections to radios, terminal units and rtty keyboards just used an open 
or closed connection to key the FSK inputs to various radios. Not much AFSK 
was used.

....Dave
----- Original Message ----- 
From: "riceguy" <riceguy at copper.net>
To: <yaesu at mailman.qth.net>
Sent: Wednesday, February 04, 2009 6:48 PM
Subject: [Yaesu] FL-101 FSK Keying Query


> The phono jack on the back of a FL-101 marked FSK
>
> Is it dry contact or a voltage input or audio ?
>
> I never found anything to help explain what input it needs
>
> Rice
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