22-Aug-04
NOTE! Before making use of the ZIPfiles in either of the subdirectories, PLEASE READ THIS! The stable operation of your instrument may depend on it.
The following notes were supplied by Fred de Vries.
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To clarify things,
The 2445B had a major change during it's production live. The uP
board changed.
The early model had no SMD's, and used a separate lithium backup
battery for maintaining the SRAM content. Also this uP board did not
have the readout circuits. It needed a separeate board for this.
Due to the separate battery you will not find the content of the
SRAM in the ZIP file :-)
The late model uP board came with a NVRAM (DS1245) and integrated
readout circuits. Most of this board was desingend with SMD's
This late model has also a rare Intel 27011 EPROM (a paged one)
It think the switch was made at serial number B050000
Regards,
Fred de Vries, PE1FBO
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So, in essence: Make sure you get the correct file set!
Keep the peace(es).
73 de KC7GR