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Vintage threads from the first ten years
Tweed Deluxe Sag and Cut-Out
 7/4/1999 0:42 AM |
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Mook | Tweed Deluxe Sag and Cut-Out I have a DIY Tweed Deluxe, Hammond 272 PT The 6V6 plates have about 308V at idle. When I crank the amp to full volume and hit a big chord (like a Pete Townsend Windmill), I can see the plate voltage shoot to about 318, then the plate voltage sinks to about 295. At this point, it seems like a "normal" sag. But then, the amp totally cuts off - no hum, no sound, nothing - for about a tenth of a second and then voltage and hum resume to "normal" idle. First filter is 40uF to a 10watt 5K resistor which feeds the second filter which is 20uF. From the second filter, I have a 10 Watt 20K resistor to the last filter, which is a 20uF. Is parasitic oscillation making it cut-out? Ideas? Thanks a bunch, Mook |
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| Bruce Hi Mook, you don't accidently have ... -- 7/4/1999 4:41 PM Tracy Hi Mook |