Audio / objects / experiments
Kind
Author: Henk
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Volume control: the stepped ladder attenuator
Twelve resistors, seven relays and no wiper on any track, that is the attenuator board. It has one property to get right,…
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The design maths of 25 W
Twenty-five watts is early in the watt spectrum, an adolescent number. Every part of this machine is a consequence of it: ten…
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Half a century of electronics
A crystal receiver in a kitchen, fifty years of detours, and one small amplifier that has to be repairable by somebody who…
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phoph pebble
I have lots of ideas for phoph but want to start where I left of in 2017. A hybrid tube amp, low…
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The LEAR Amp
in 2017 I designed the LEAR Amp. A small tube amplifier built in two parts, a power supply and the amplifier itself.…