Links to Crate schematics

[gary rabbitt]

Hi guys,
Just an update. I replaced the MOSFETS, as both were totally shorted. All other parts checked out ok.
Powered up after the dim bulb check, Variac started to hear audio. Full voltage, a brief test it was functioning good.
I set the bias adjustment per specs on the schematic. All voltages looked on spec.

It sounds great, the effects functions as it should.
One thing I noted, it did not use thermal paste on the MOSFETS. Paste was only used on a small transistor held down by the heat sink>
The MOSFET used 'Si pads', which I read it was not recommended that thermal paste to be used. The parts did not get hot at all after 1/2 hour of being powered up.
Thanks to all that gave he help on this amp, it's really appreciated.
If any of you all ever need a diagram or help with a vintage radio, give me a shout.
Take care, Gary.

[Jazz P Bass]

Silipads by themselves are fine.

No need for the grease.

[vintagekiki]

Crate schematics

http://www.eserviceinfo.com/index.php?what=search2&searchstring=Crate

[gary rabbitt]

Thank you Kiki, Unfortunately the EService page didn't have the model I needed at the time. I was able to get the diagrams from another member, and I subsequently repaired the amp. Still working fine after replacing the MOSFETS that were all shorted. I usually check Eservice as sometimes they will have diagrams on other things I work on.They are a good resource.

Appreciate the reply though, have a great evening!
Gary.

[vintagekiki]

Links to Crate schematics

http://bee.mif.pg.gda.pl/ciasteczkowypotwor/SM_scena/Crate/

http://bee.mif.pg.gda.pl/ciasteczkowypotwor/%23SM_scena/Crate/ ¹⁾

[vintagekiki]

Crate CR-45

https://music-electronics-forum.com/attachment.php?attachmentid=50990&d=1541221195
Jazz P Bass

[vintagekiki]

Crate GX-15R

https://music-electronics-forum.com/attachment.php?attachmentid=44427&d=1502246647
DrGonz78

[vintagekiki]

Crate schematics

http://schems.com/bmampscom/crate/

[vintagekiki]

Crate GTD120-212

https://music-electronics-forum.com/filedata/fetch?id=912574&d=1599075090

DrGonz78

[SoulFetish]

I have a complete schematic for the Crate V30 3112 amp, including power transformer data for both import and export models. I combined them into a single PDF file.
Maybe bmamps would find it a helpful addition to the hosted schematic archive.

Crate V30 - 3112 schematic & transformer.pdf

The one caveat is that some of the text was rasterized and low resolution. So, I ran it through an OCR and exported the text to reformat it quickly in illustrator. Sometimes this causes character errors. I corrected the ones that I saw, but if you catch any others, the text should be editable in Acrobat without affecting any of the other graphics.

[vintagekiki]

Crate FlexWave15