Mono Block Ultra-Linear Class-A Push-Pull EL84 Tube Amplifier Project
Recently Bruce has been enjoying his
PoddWatt amplifier and the EL84 tube sound that he has revisited the original
OddWatt amplifier project, tweaked it and put together an improved EL84 push-pull amplifier. Like the previous EL84 projects the
Mini Block amplifiers use a EL84 self-inverting push-pull output stage that is biased into class-A operation. The big difference is that the amplifiers are built as mono blocks.
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| Mini Block Push-Pull EL84 (6BQ5) Valve Amplifiers |
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| Interior - Mini Block EL84 Push-Pull Amplifiers |
The input circuit is a 5751 SRPP. The ouput uses the ultra-linear connection and output power was 5.8 W @ 2% distortion and less than 0.25% at 1 W. The measured frequency response was 10 Hz to 44 kHz within 0.2 dB. Bruce reports that the Mini
Blocks have slightly more output power than the Poddwatts and seem to have more detail
while retaining all the good characteristics of the stereo Poddwatt amps. Full details are available on the
Mini Block Ultra-Linear Class-A Push-Pull EL84 (6BQ5) Valve (Tube) Amplifier Project page.
More Mono Block Tube Amplifier Projects
Great work, looks fantastic!
ReplyDeleteIs it possible to get a part list of this project?
ReplyDeleteinteresting project!
ReplyDelete