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Original Message

ok, ok, ok....

Posted by Penguin on June 10, 2012 at 20:15:09:
But if i look at tyu's diagram the black lead goes to the - terminal of the input and the center, in my case orange is the positive... I had the green terminal going to the - because it was in the same location as my old one. so today i reversed the order swapped black to green and yellow to blue. that would reverse the order of the leads...I stil have the distortion, even with the Ma-1. I isolated it to the bass section. So I either already blown something, or the distortion is caused by something else. But what could it be? And why would having the the 8 ohm resistor in the circuit would make it not noticeable, or am i going deaf? This is about as maddening as it can be :). So before i keep murdering stuff, does anybody have the color coding for the bass transformers? The old ones are wired correctly because those are the factory things. I know the that the red and the black wire are the primary side because on the secondary side i have 3 big terminals encased in some insulator plastic. on the old transformers. the new ones are just three leads coming out from the other side of the transformer.

Based on what i am experiencing, maybe the old bass transformer is fine too, something else is giving me fits. I am not not about to start swapping things between the tow backplanes, i find that hit and miss approach to dangerous when dealing with high voltages. Is there a more systematic approach to track this down?

Here is the where i am sitting.

I modified one back plate only. I disconnected the 8 ohm resistor, if i hook up the bass section only to either of the amps, MA-1 or the SS amp with the i get distortion. I have not moved the backplate to the other panel. Based on tyu's diagram i think i had the bass transformer reversed. I swapped black and green, yellow and blue. So right now the input of the bass is between black -and orange+, used to be green - and orange +. Distortion is still the same.

Do i have something blown in the mixer? Do i have a blown toroid? Am i just insane? Ok the last one has a trivial answer, but still, this is nuts?

So i have a fine mess on my hands :)

dee
;-D