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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: how low can you go.....?? posted by vinnie2 on January 1, 2017 at 08:27:21:
Been playing with different combos of plate volts and current on the 813's in my bread boarded 26/813/813 amp. That is one of the things I love about SET amps, just a few parts changes can make a big difference in the sound. I first ran it up to 270 vdc & 93mA current, but this morning I dropped it back to 305 vac & 75mA. That's about half way back to the original values of 62mA & 325 vdc I started with. It is really interesting to hear the differences in the sound of the amp these changes produce. The highest current had the gutsiest sound, but the 75ma has a nice balance between that and the clean highs and pure tones of the 63mA point. Right now it looks like 75mA is what I will use, but I may load up on a bunch of different value resistors to use for the cathode resistors and see how much I can fine tune it to my liking. Never a dull moment with these toob thingeys....
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Follow Ups
- what a hoot! - vinnie2 06:57:28 01/02/17 (2)
- RE: what a hoot! - dave slagle 08:59:23 01/02/17 (1)
- RE: what a hoot! - vinnie2 10:55:45 01/02/17 (0)
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