Found in Popular Electronics from September 1956, this circuit uses a double tube and can be powered from the mains without the need for a transformer. The valve used has a 117V filament.
Metronome (T516E)
- Details
- Written by: Newton C. Braga
Found in Popular Electronics from September 1956, this circuit uses a double tube and can be powered from the mains without the need for a transformer. The valve used has a 117V filament.
