[1000mp] 232 chip

[J. C. Mc Laughlin]

Dear Tom:   Here are two old messages ;

From: "J. C. Mc Laughlin"
Sent: Sunday, September 19, 2010 12:14 PM
To: "George" <gtowerfl at comcast.net>
Subject: Re: [1000mp] RS 232 Problem

> Dear George:
> You are welcome.  I can send to you a PDF file of the specification sheet
> of the 202E chip - and all of its variations.  On the first page, it says
> that it is a direct replacement for the same chip that is used in the rig.
> Let me know.
>
> 73,   Mac  N8TT

AND:

> From: J. C. Mc Laughlin
> To: 1000MP Dec2001 <1000mp at mailman.qth.net>
> Sent: Saturday, April 4, 2009 10:31:46 PM
> Subject: [1000mp] RS232 port repair
>
> Dear Group:
>
>    A weak link with the FT1000 Mk V (and probably all of the other members
> of the family) is the CAT port.  The chip used is fragile.
>
>    The chip appears to be an Analog ADM232LJR for which a MAX232CWE is
> supposedly a pin-for-pin substitute.  Improvements have taken place in
> such
> chips.  I propose to replace my defective chip with a ADM202EARWZ (the Z
> just indicates low Pb).  The ADM202EARWZ appears to be a pin-for-pin
> replacement, a chip with considerable resistance to ESD, and a chip with
> attention paid to EMC.
>
>    What experience have group members had with more rugged substitutes to
> the original RS232 chip?
>
>    Today, one would design using an optically isolated chip, but I did not
> find one that is a direct replacement.
>
>    73,    Mac    N8TT
>
-------------------------------------------------------------------------

So get the 202E chip.  I sent my extra chips to Byron Campbell and he 
replaced the chip in my FT1k.

73,   Mac   N8TT   JCM at LenTel.Com

-----Original Message----- 
From: Tom Horton
Sent: Wednesday, May 29, 2013 11:58 AM
To: FT-1000MP at yahoogroups.com ; 1000mp at mailman.qth.net
Subject: [1000mp] (no subject)






Does anyone have any experience repairing the the "CAT" on the FT-1000MP 
(plain).
Can anyone help me?
Tom K5IID

There is no joy in Mudville!


K5IID Tom Horton Hillsboro, TX
E sorter for ARRL W5 bureau
Same call for 55 years!
______________________________________________________________

J. C. Mc Laughlin
Michigan U.S.A.
Home: JCM at LenTel.Com