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1980's Crate CR-285B Bass Amplifier information thread

There are two of those resistors in the amp. R44 and R45. They are 0.22 ohms +/- 5% tolerance, 10 watts. They are connected in parallel, one end to ground, the other to the speaker output jack sleeves and R42.

The resistors are in the power amp, not the preamp as you suspect. Look for a second resistor just like the one that fell out. Then again, if one came out perhaps both did. You may have to trace the circuit using the schematic to find them. Probably on the board that we are seeing the back of in your images

Download the schematic here:
Link Removed

This finally solved it for me. These resistors are obstructed by a support bar and I didn't see the holes on the pcb under it where this fell off. Thank you kindly!

Any idea what this white grease is? I want to wipe it off but not if it's important
 
This finally solved it for me. These resistors are obstructed by a support bar and I didn't see the holes on the pcb under it where this fell off. Thank you kindly!

Any idea what this white grease is? I want to wipe it off but not if it's important

Good news.

You’d have to show me an image of the grease.

There is typically a white grease under power transistors. It acts as improve heat transfer. It needs to be under the transistors but often seeps out if too much is applied. You can wipe it off any excess if this is what it is.
 
Thanks for commenting on my post. My CR-165B holds a special place with me as I used it for every gig in my town of 3000 growing up. Now I play for a church that has 14,000 and uses all the bells and whistles with IEM and Abelton, so the "Sprint Series" amps have been fun for me to get back into. Didn't know these were part of a series tbh.
 
I'm familiar with this amp. I bought this new with matching cab (2 x 10" + 1 x 18") around 1986. It had some hard miles put on it, then went into hibernation along with my musical "career". When I started playing again I tried out many different amp / cabinet configurations without finding happiness. Finally I dusted this off and plugged it in. Hard to describe but it has a grit and fullness to it that brings me joy. Love it with the berg610 which is a little easier to pack around. Always fun to see the confusion on peoples faces.
IMG_1964.JPG
 
I'm familiar with this amp. I bought this new with matching cab (2 x 10" + 1 x 18") around 1986. It had some hard miles put on it, then went into hibernation along with my musical "career". When I started playing again I tried out many different amp / cabinet configurations without finding happiness. Finally I dusted this off and plugged it in. Hard to describe but it has a grit and fullness to it that brings me joy. Love it with the berg610 which is a little easier to pack around. Always fun to see the confusion on peoples faces. View attachment 3246907

hello!
how would the amp sound with a 200w/300w cabinet at 8ohms compared to its 4 ohm cabinet the amp recommends. would it loose its character at 8 omhs?

thank you!
 
Keeping the zombie thread fed. I am waiting for one of these to show up on my doorstep. My main cab is a Mesa 1x15, but.....the local music store has the BE-18210. For $99. I don't gig, no band prospects, no nothing other than writing/recording. What to do.
 
Hey again zombie thread. This was an amp I always wanted to try out and read good things about them. Thankfully they're cheap and built well. Here's a fixer upper I got...it didn't need anything other than a new power cord (spliced & chewed one pictured below) and a little clean up. Tolex scrubbed, a little rust removal, polished some metal, sprayed the pots, added some silver tops to a few knobs. This amp kills!

IMG_20250524_143058219_HDR.jpg
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IMG_20250524_170318150_HDR.jpgIMG_20250524_170331074_HDR.jpgIMG_20250525_112138001_HDR.jpgIMG_20250525_112933340.jpg
 
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