Crate BX-100 amp

[ampdoc]

I got this in, and someone else had attempted to repair it, the other guy
told me he had replaced the finals several times but they kept failing on
power-up. Looking at the output stage I think one of the FET's may be
incorrect. Could someone check the schematic and see if this unit is
supposed to have 2 IRFP140's for finals (both outputs N-channel?!)?
I believe this should have a complimentary output pair, IRFP140/IRFP9140, N
and P channel, but as I did not see it before parts were changed I'm not
sure.

Jammy

 

[boardjunkie]

I got this in, and someone else had attempted to repair it, the other guy
told me he had replaced the finals several times but they kept failing on
power-up. Looking at the output stage I think one of the FET's may be
incorrect. Could someone check the schematic and see if this unit is
supposed to have 2 IRFP140's for finals (both outputs N-channel?!)?
I believe this should have a complimentary output pair, IRFP140/IRFP9140, N
and P channel, but as I did not see it before parts were changed I'm not
sure.

Jammy

Call SLM and they'll email you the schemo. Just for reference, posting
in alt.guitar.amps will get more responses.

 

[Meat Plow]

Call SLM and they'll email you the schemo. Just for reference, posting in
alt.guitar.amps will get more responses.

Most of the time ones that you might not want

 

[boardjunkie]

Most of the time ones that you might not want

Heh...well those of us who haunt that group know that drill. And that's
AWL THAT MATTERS ON THE INTERNET ;-)

It has quieted down some after Lord Valve's semi retirement from the
group. He does know the "skinny" tho......sorry, couldn't resist.