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It is an ideal project to try if you have not used valves before. The construction is not complicated and the components are easy to get at very reasonable prices.
It would be ideal as an amplifier for a cystal set or even a guitar (but you will need a preamp). The supplies required are 90 volts dc for the ht (10 x PP3s in series) and 1.4 volts for the heaters. The power output will be 0.25 of a watt.
Last updated 13.10.2004