"bg" wrote in :


Jim Yanik wrote in message ...
"bg" wrote in :

Both channels on the verticle front end are damaged. One dual FET
follower is a definite (Q1297). It is tek part number 151-1090-00. I
haven't seen one yet using google. Is there a replacement or two
discretes out there that will work?

They would have to be matched,else you get an offset.

check this out;
http://www.sphere.bc.ca/test/tek-parts/tekparts2.html
it appears they have some 151-1090's for sale.
they also cross ref to a "2N5911 family".



the 155-0078-xx is used in a lot of different scopes,several 7000 series
plug-ins,too.

--
Jim Yanik
jyanik
at
kua.net
Thanks Jim. I had already been to that site and didn't see it the first
time, even with my glasses on!
Offset is the issue I am having.
bg



I've seen the input BNC connector cause DC offsets!
seems it absorbs contaminants and becomes a weak "battery".


--
Jim Yanik
jyanik
at
kua.net