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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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In Reply to: Would You Buy a SET Amp Using DC Heating on the Output Tubes? posted by Gerry E. on July 21, 2011 at 10:56:10:
DC heating CAN sound just as good with the right care taken in the design. With that said, you have to know what the builder/manufacture has provided in the heating design.
I built a pair of mono blocks and heated one with AC and then proceeded to build a DC supply for the other and compared until I was happy that the DC heating was not inferior. This took very quiet diodes, a hefty choke,a combination of cap filtering and a common mode choke on the back end. I used a scope and my ear until I was happy with the results.
This also depends on the output valve used. A 2a3 with a 2.5 vac supply will be more palatable as far as 120 HZ hum. A valve using 5 vac or higher will be more of a hummer even after the null pot is applied.
If you're looking at a 2a3 or 45 amp, personally, I would go with AC heating. If you're looking at a , 845, 300B or a 50, VT-52 (not commercial but wonderful)..I would assess the design. You're throwing a bunch of money around regardless so make the building / manufacturer prove their design is possible.
Stuben
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- RE: Would You Buy a SET Amp Using DC Heating on the Output Tubes? - Stuben 07/21/1115:44:02 07/21/11 (0)
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