[time-nuts] Difference between HP 5370A and 5370B

Mike S mikes at flatsurface.com
Wed Apr 27 11:46:12 EDT 2005

The ones in mine are TI 2708's, AIR. These are 3 voltage devices (+5 -5 +12). It might be easier to adapt 5V 2716's to work, as programmers which handle them are cheaper (such as the Willem one). I believe that there are some DIP switches on the firmware board, maybe such an adaptation is already supported.

Also related to this thread, it was mentioned that one difference with the "B" was that it moved processor RAM from a separate board to the processor board. My "A" appears to have that architecture. There's an empty slot labeled for RAM, some identically house-marked chips on the processor board which I assume to be RAM, and a separate board for the firmware EPROMs.

At 11:04 AM 4/27/2005, jim_johnson at agilent.com wrote...
>Hi Daun,
>   Not sure if you could do that or not.  The
>EPROMS are old technology compared to what we
>have today so I'm not sure just how you'd "read
>'em and clone 'em".  I'll try to see if there's
>a way ...

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