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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: will someone please check my calcs... posted by Vinnie on April 30, 2007 at 15:50:39:
Everything is in the ballpark except the 6AU4s. You've got the filaments right, but the rectifiers don't consume that much HV wattage. The wattage they consume is the result of the voltage drop across each 6AU4, not the full voltage that they output. Each rectifier probably drops less than 20V, so multiplying that times .175A (their maximum rating) yields 3.5W. Multiplying that x 2 = 7W total consumed within the two rectifier tubes.The total for the tubes you've listed will be roughly 400W. Divide that by 120VAC, and the result is 3.33. To accomodate the turn-on surge (power supply and filaments) and typical transformer efficiency, I would recommend a fast-blow fuse between 5 and 7 amps.
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Follow Ups
- Here's what I come up with... - Triode_Kingdom 18:09:51 04/30/07 (3)
- One more thing... - Triode_Kingdom 18:16:39 04/30/07 (2)
- Re: One more thing... - Vinnie 03:33:48 05/01/07 (1)
- Re: One more thing... - Triode_Kingdom 05:28:55 05/01/07 (0)
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