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Bonjour, Le récent concours HF( 19 décembre), utilisant des transceivers à…
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DIY SYNTH and Audio GEAR PORN !
Viva Verde !
An ingenious dual triode circuit design to cancel out power supply noise.
The amplifier uses a pair of 19J6 tubes as a voltage amplifier stage - they're cheap, have high Gm, and the heater makes a perfect resistive load for a MOSFET source follower.
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Valve DIY projects and kits...