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12th October 2007, 08:52 AM
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#1 |
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diyAudio Member
Join Date: Sep 2007
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12/24 volt tubes
are the low voltage tubes mainly good for unity gain or low gain in a preamp? i haven't found any amps using one in the output stage e.g. headphone amp.
a forum search says there's no substitute for high voltage. |
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12th October 2007, 03:55 PM
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#2 |
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diyAudio Moderator
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6GM8 and 6DJ8 are commonly used in low voltage tube amplifier circuits, although for a headphone amplifier 24V is probably below the lower limit even with these tubes.
And yes there is no substitute for higher voltages.
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"Extraordinary claims require extraordinary evidence." - Carl Sagan |
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12th October 2007, 04:13 PM
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#3 |
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diyAudio Member
Join Date: Mar 2005
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... maybe this one fits for you ... you can take an old pc power supply to feed them ...
 Details : DC @ Headphone 2.5 mA and 4 mW power loss. - passable Filament current 3.8V @ 600mA URL in German
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