[volt-nuts] 3458A - To Modify or Not To Modify?

[J. L. Trantham]

I agree.

However, if I am going 'all in' on damage to the board by placing sockets
for the EPROM and the DS1220Y, why not go 'all the way' and also do the
other DALLAS chips?

Interestingly, I got four HM62256LP-10 chips off theBay, inserted them in
U123-U126, and, miraculously, 'OPT 1,0' appeared.  I noted that the sockets
are plain 'AMP' closed frame sockets with just plain 'tin' (I think?)
connectors.  I think I will use the same socket, but with Gold Plating, for
the EPROM and the DALLAS chips as opposed to the Mill-Max.

Any thoughts?

Joe

-----Original Message-----
From: volt-nuts-bounces at febo.com [mailto:volt-nuts-bounces at febo.com] On
Behalf Of Poul-Henning Kamp
Sent: Sunday, November 06, 2011 4:20 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] 3458A - To Modify or Not To Modify?

In message <ABBBD83DE5B74F8885F0F686C7ACD9D3 at cardiac5f772ce>, "J. L.
Trantham" 
writes:

>Just to make sure I understand, since they are all DALLAS chips (two
>DS1230Y-150 for 'program memory', and a DS1220Y-150 for 'cal memory'), with
>their internal batteries, they all will die in the future and that 'memory
>of programs' function will be lost.  So, therefore, it seems that they will
>need to be replaced from time to time (mine are 14 years old) and since I
am
>going to need to remove them to replace them, why not place a socket?

Because in all likelyhood you will not care for the functionality
which the DS1230Y's deliver, so rather than risk another 56 pins
to unsolder, you can just leave them in, with no (relevant) loss
of functionality.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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