- This Is Ridiculous, Scott R-316 AC Problem - 2 Updates
| Jeff Urban <jurb6006@gmail.com>: Apr 09 11:38AM -0700 It was so stupid I don't want to mention it. I read it wrong. So back to the amp. Man, these funky old PC boards, and sometimes marked wrong and sometimes marked ambiguously. But there is no excuse for Q806 or whatever to be marked wrong - you guys designed the thing ! This one however did not have mistakes on the print. Small favors... Next thing is the bias, I have to dig up a transistor, I know I got it. That and a couple resistors and I am outta this thing. i have to raise my rates on shit like this. It is not big power so it is hard to get alot of money. And in some cases even though I got some of the best high power outputs out there, in a lower power unit it is not always appropriate to use them. Not only is it a waste but you might not bet into the thick of the gain curve. But I do got some gold. I got real JFETs, both polarities. They can do things depletion mode MOSFETs cannot. So ow all I need is a bipolar NPN with the base in the middle that maintains its hfe at low Vce. Day in the life. |
| Tim R <timothy42b@aol.com>: Apr 09 01:09PM -0700 > Of course there is always the kill-or-cure spark-off - Obtain a high-value, high voltage cap and get it fully charged, this is where an old-fashioned full-voltage cap tester becomes handy. Discharge it into the suspect winding. It just might fuse that thermal failure. I have done this three (3) times, and it worked 2/3 times. The third time, the cap did discharge, but the result was 'open' even with the tester. > Peter Wieck > Melrose Park, PA Did this once by accident, trying to locate a break in an underground power line. We were using a thumper and listening to it "thump," then it faded and the line started working again, must have welded itself across the break. |
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