Quote:
Originally Posted by G6Tanuki
Yes, but I don't remember coming across any radios with the EBL21 or its series-connected-heater version the UBL21 [55V@0.1A] that was intended for use in AC/DC radios.
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The EBL21 is extremely common here in Poland. I do wonder if there was an extended period after WWII when the valve factories of the People's Republic only knew how to make EBL21s and ECH21s because they turn up absolutely everywhere, even in the most unexpected places in commercial equipment. I saw a 600W PA amplifier with some monster transmitting triodes in the output stage, but the preceding stages were entirely ECH21s and EBL21s.
Chris