Re: 38S key/keyer connections

---------

From: Dan Tayloe-P26412 (Dan_Tayloe-P26412@email.mot.com)
Date: Thu Mar 06 1997 - 14:32:00 EST


     From mdwatt@usit.net Thu Mar 6 15:10:57 1997
     Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by
     fidoii.cc.lehigh.edu with ESMTP id <34836-32760>; Thu, 6 Mar 1997
     10:10:55 -0500
>I have *almost* finished my 38S, and am wondering if one can
>add *both* the straight key connection and the keyer connection.
>I'm assuming I'll lose the sidetone with the sk connection.
>Occasionally I'd like to use my CMOS II with the radio (relay
>keyed). Plus, I don't have the TiCK chip yet, but I'm almost ready
>to smoke test ...
     
>Marty, KM7W
     
     Marty:
     
     You can still use the 38 special key input even after installing the
     Tick chip. The keyer circuit uses an open collector transistor to
     pull the key line low. The straight key input will be in parallel
     with the open collector transistor output and will cause no problems
     at all.
     
     - Dan Tayloe, N7VE, Phoenix, Az, QRPL # 696, Az ScQRPions


Search QRP-L Archives

[ QRP-L Archive | ]
[ 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 ]

---------

This archive was generated by hypermail 2b29 on Fri Jun 02 2000 - 11:33:11 EDT

kd4ab@kd4ab.org