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In Reply to: RE: Modifying/upgrading vs. restoration of vintage receiver posted by bob24 on March 29, 2009 at 07:59:09
Since the parts used in any particular older unit are not being manufactured today exactly as they were, and the original parts are surely out of spec by now, getting back to an "exact" stock sound is not exactly possible. However, you can make parts choices that can get you close if that's your specific obsession.
If you happen to be *that* interested in hearing what was intended by the designer here's an option: Purchase two units. Rebuild one as close to stock as you can and let it stand as your stock reference. The second unit can then be stuffed with boutique parts galore or circuit modded ad infinitum.
If nothing else, it takes the guess work out of whether or not you've made a definite improvement. More than that it keeps you in touch with what you have lost in the process of improving certain areas of the sound. You almost always lose something. I like going this route. It does require patience as you have to let parts burn in for quite a while. It's cool, and fun, to shootout both versions step by step. In the end it works for me. It's just one way to go.
Follow Ups:
I've found restoring solid state gear has offered me more improvement and appriciation of the original sound. "Maybe" more towards it's original intent - only assuming what it would have sounded like?
But on occasion I have found doing a total pull out and parts replacement with "some" tubed amps left me very dissapointed. What would start out as a vintage tube sound with great possibilities ended with a total loss of it's character and charm. Not the way I wanted to go. I know this could be a long thread on it's own.
As Jim pointed out, to my surprise, there are WAY more variables since it's production date. So bring it back to spec first and take it from there. Personally I wouldn't go parts "crazy" on it. Just the basics.
charles
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