Jul 14, 2005 at 2:05 AM
I need some advice from the group.
Tested the Tread - OK.
Tested the Pimeta on batt power - OK.
Tested the Pimeta / Tread combo - OK.
The pimeta has been set as class A using:
Tangents Pimeta board v1.1b
AD8620AR, AD8610AR op amps, Burr-Brown BUF634 buffers ,Wima MKS-2, ELNA Cerafine, BC2062-ND Caps ,ALPS RK27, Pimeta cascode set, Vishay Dale resistors and silver-bearing solder.
Now the horror story...
Everything worked better than expected, adjusted the Tread to 24v, hooked it up to the Pimeta, it sounded great. My first "electronic" project in about 10 years.
The horror part of the story?
The Pimeta and Tread were/are sitting on top of the cigar box that I used for a work surface. I haven't gotten to the point of installing in a case yet. I figured that I should test every thing first.
While listening to some Acoustic Alchemy, I called my wife in to listen to my new toy and the left side output on the 1/8" jack fell against the LED on the Tread. Loud buzz, left side output all but non-existant. Left side buffer heated up, it's toast. No spares on hand. Right side still sounds good.
Is it possible that I also ate the left side of the op amp? I am going to need to order up some replacement parts.
So far, Buffer and AD8620AR.
What else might have fried? The left buffer was the only "hot" component.
Thanks for any help/advice.