[RTTY] Crazy Idea for FSK

[Kok Chen]

On Feb 13, 2008, at 1:37 PM, Lee Buller wrote:

> Use an optoisolator to key the rig.  FSK!

By the way, if you let the rig supply the power and place the  
regenerator on "the other side" of the audio transformer from the  
sound card, you won't even need optoisolators.  Just use an open  
collector transistor since galvanic isolation is already provided by  
the transformer.

73
Chen, W7AY