[Techtoolslist] HP 1980b replacement thyristor...

[Andrew Welburn]

hi all..

  I have a HP 1980b oscilloscope that has a shorted thyristor, marked 
1884-0217.. after looking online and getting two quotes for a 
replacement ($777.77 and $600 each!) i decided to hunt a replacement.

  I managed to pick up a service manual for this thing, and helpfully HP 
lists the 1884-0217 with a manufacturer number of MAC10-2

  I can't find any of those either just yet, but wondered if a 
replacement MAC10-3 might be ok as i can get one of those..

http://www.datasheetarchive.com/MAC10-2-datasheet.html

  The MAC10-2 has a maximum repetitve peak voltage of 50v, the MAC10-3 
is 100v...

  Its used in the LVPS (pcb A1 refdes A1Q2), would having a higher 
maximum repetitve peak voltage cause problems when replacing a 
Triac/Thyristor?

any advice appreciated!

-- 
Andrew Welburn
http://www.andys-arcade.com