In Reply to: RE: I think one of my backplates is wired wrong.... posted by Lew on June 10, 2012 at 13:59:02:
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
True terror is to wake up one morning and discover that your high school class is running the country.
quote by Kurt Vonnegut
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Follow Ups
- ok, ok, ok.... - Penguin 20:15:09 06/10/12 (12)
- What does it sound like? Do you have a damaged panel? nt - Ralph 08:12:57 06/11/12 (9)
- I will check tonight - Penguin 09:46:06 06/11/12 (8)
- It is official it is the panel - Penguin 13:57:43 06/11/12 (7)
- RE: It is official it is the panel - Lew 12:02:17 06/12/12 (5)
- One interesting thing.... - Penguin 12:27:44 06/12/12 (3)
- RE: One interesting thing.... - Lew 14:13:12 06/12/12 (1)
- RE: One interesting thing.... - Penguin 21:54:48 06/12/12 (0)
- RE: One interesting thing.... - tyu 13:25:45 06/12/12 (0)
- I always wanted a good excuse to have them re-mylared - Penguin 12:10:39 06/12/12 (0)
- the day is Monday :) - Penguin 12:00:37 06/12/12 (0)
- RE: ok, ok, ok.... - Lew 07:36:29 06/11/12 (1)
- RE: ok, ok, ok.... - Penguin 09:44:41 06/11/12 (0)