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[ct-user] LPT Keying/DOS V6.2/CT V9.37

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Subject: [ct-user] LPT Keying/DOS V6.2/CT V9.37
From: Bill Bennett N7DZ <n7dz@qsl.net> (Bill Bennett N7DZ)
Date: Wed, 17 Jun 1998 11:34:15 -0700
I have not yet tested CW keying with the LPT port. Do I understand correctly
that I will have to rewire the cables that worked with version 8? Jeesh! I
hope there was a good reason for that!

Bill N7DZ

Ken Wolff wrote:

> In versions prior to 9.3x pin 1 (strobe) does the keying, while pin 17
> (select) is held high to provide bias to the transistor. In versions 9.3x
> and above, strobe is held low, while select does the keying. I suspect you
> are using a slightly different circuit than the one in the CT manual.
>
> 73, Ken K1EA




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