Vaccum Tube Elektor

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1984 November: Ten Watt Valve Amplifier With Just Four Valves
2001 May
2003 April
2003 May
2003 September
2003 Oct Valves at low plate voltages 2nd part

PL504 at 24V driving loudspeaker

Transformer: Mains, 230V/24V
Loudspeaker 8 Ohm
Heater 300mA @ 27V

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