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21st April 2009, 07:13 AM
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#51 |
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diyAudio Member
Join Date: Feb 2004
Location: Silicon Valley
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I'm auditioning a sand-state amp right now. I have vanquished the oscillation problem (fingers crossed) by using a larger stopper resistor (2k) at the gate of the input jfets. The jfets were fast to begin with, and cascoding them with triodes made them extra slippery. The 2k appears to have shut them up. I already had grid and plate stoppers on the 1625s - they were just doing what they were told to do. I'll move the amp back into the living room when I get a chance.
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