[WriteLog] gridblock keying interface

[George Johnson]

Kevin,
Yes it will work but you need to include a 'standard' LPT1 keying circuit to
drive your circuit.  That circuit is also documented in the help files.  It
inverts the active high keying signal from the LPT1 port to an NPN keying
transistor to provide the needed input to your level shifter.  (Lots of
words but a very simple circuit).  Holler if you need more information.

73, George .. W1ZT

----- Original Message -----
From: "Kevin Stover" <kstover@willinet.net>
To: <Writelog@contesting.com>
Sent: Sunday, July 01, 2001 11:57 AM
Subject: [WriteLog] gridblock keying interface


>
> Hello all. I'm new to the list.
>
> I need a parallel port keying interface for my TS-520.
> I was thinking of using a circuit that does the same thing for my old CMOS
> Super Keyer kit.
> It can be found at http://home.att.net/~jacksonharbor/gridbsch.pdf.
> Can this circuit be used with the parallel port directly? If not, what
mods
> need to be done?
>
> Thanks for the input.
>
> Kevin, NØRKX
>
>
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