janekr: [^janekr] "grid modulated and require only connection to a microphone and battery to operate. [...] The circuit is painted on the glass envelope of a 6K4 subminiature triode 3/8 in. in diameter and 1 1/4 in. long." |
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2021/09/19 14:43:00 przez www, 1 ♥, 1 ∅ |
Lubią to: ^gliniany, ♥
2021/09/19 14:57:43