[GreenKeys] Model 28 Baud Rate Change

Jim Haynes jhhaynes at earthlink.net
Fri Feb 24 17:55:24 EST 2023


Hearing a question like this always prompts me to suggest leaving the
machine geared for 75 baud and using an electronic speed converter to
accomodate other input speeds.  I believe some of the Dovetron demods
might have such a part installed.  In any case you could use an old
fashioned 40-pin UART IC to do the conversion.  Or what we did before
we had UARTs was to make a speed converter out of small scale ICs.
Such as written up in Ham Radio magazine December 1971 p. 36.

Now if it's a KSR there is the Irv Hoff gadget that down-converts
the keyboard signals and has buffer so you don't overrun the slower
transmitter.  Look for UT-4 in RTTY.

 	---

 	"Ya can argue all ya wanna, but it's dif'rent than it was."
 	"No it ain't! No it ain't!  But ya gotta know the territory."
 		Meredith Willson, The Music Man


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