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Sunn Coliseum 300 bass Schematic....

Started by ilyaa, March 19, 2017, 05:44:42 AM

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ilyaa

i know, g1, isnt that weird??

but it matches the compressor and there doenst seem to be a problem with the input so i wont look a gift horse in the mouth!

i ordrd a couple NE571Ns - ill let you guys know what happens!

ilyaa

just an update -

I ended up replacing every IC on the preamp - after a fiddly 'biamp crossover' pot that almost sent me back to square one - it was one of those 'everything works!' and then put in back in the chassis and nothing works again! - but luckily just a bad solder contact -

we are back in business!! I replaced the flimsy ribbon cable with individual stranded wires - time consuming but much more sturdy - and had to replace a couple broken send/return jacks on the back -

looks like there was something serious that happened to the +/- 15 rails because all of the op-amps were fried. but I've ran it for quite a while now and we seem to be back in business. I did replace the zeners and regulator transistors for the low voltage rails  - think those were the initial problem.

anyway, thanks guys! kind of a long saga but all's well that ends well