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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: RE: New Soul Sister pre posted by drlowmu on February 22, 2017 at 17:22:41:
Higher drop than the 5U4, but it's far from whimpy... my RCA MI-12188A amplifiers have a 750-0-750 V power transformer, straight into the 5R4, then a choke input. They run at around 200mA with a B+ of 590V or so. Had them for 15 years and never changed the tubes. Still test good.
The 5R4 is a high vacuum tube designed for higher voltages than the 5U4 can handle. And all that with a 2A filament. It's a great tube. In a preamp it would be loafing.
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- RE: New Soul Sister pre - maxhifi 19:42:11 02/22/17 (0)
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