Modulator stage using 2 RCA-892 vacuum tubes, in Audio-frequency amplifier, Class B, of Radio Transmitter of G-E International shortwave Broadcasting Station W6XBE, on Treasure Island in San Francisco Bay, Calif,
Title: Modulator stage using 2 RCA-892 vacuum tubes, in Audio-frequency amplifier, Class B, of Radio Transmitter of G-E International shortwave Broadcasting Station W6XBE, on Treasure Island in San Francisco Bay, Calif,
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