[GreenKeys] FSK converter madness

[Harold Hallikainen]

Following up, issues like this is why I really like having a terminal unit
act like a Teletype. It should be able to key a floating loop and sense
the current in a floating loop. An external loop supply with all equipment
(KSR printer, TD, Reperf, and TU) have the same interface to the loop.

Harold
https://w6iwi.org/rtty/DspTU2/





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