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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: Hot stuff! posted by Brian C. on July 17, 2005 at 10:50:02:
No I'm using two stages of 112a, so it's 4 112a's total 1 amp, using 12 volt battery and selecting where in the string of 1/2 ohm resistors to tap off for the filament power.Px25 is 4 12v batteries fixed bias. Filament of px25 is ac heated with hum pot.
Power supply is L Black Gate wkz, L 572b shunt regulator set at 130mA.
Power for 112a's is off the bottom VR worth 180v, dropped through a 1k tantalum and decoupled with another Black Gate wkz (if you take the power for the four 112a's straight from the vr it oscilates and beats hell out of your woofers).
It is doable with two stages of px25 but even I'm not that wreckless to use 4 px25's in a single amp.
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Follow Ups
- Re: Hot stuff! - Paul Barker 07/17/0511:13:59 07/17/05 (6)
- Re: Hot stuff! - Brian C. 13:45:21 07/17/05 (5)
- Re: Hot stuff! - Paul Barker 23:29:37 07/17/05 (4)
- Yes, I remember... - Brian C. 03:04:16 07/18/05 (3)
- Re: Yes, I remember... - Paul Barker 04:14:37 07/18/05 (2)
- Re: Yes, I remember... - dave slagle 18:36:50 07/18/05 (1)
- Re: Yes, I remember... - Paul Barker 22:53:26 07/18/05 (0)
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