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Odd Lots


  1. Jack Smith says:

    How to the Russian LV tubes compare with the short-lived line of 12V plate tubes developed in the 1960’s such as the 12DS7? has a data sheet on the 12DS7.

    I can’t recall ever putting my hands on one of the US 12V tubes – think they were mostly used in automobile receivers, with a germanium audio output transistor. And they were “overtaken by events” as the phrase goes when transistors got reasonably cheap and good at FM broadcast frequencies.

    All the vacuum tube vehicle mounted commercial two way gear of that vintage I’ve had my hands on used standard HV type bottles, with a vibrator supply for receive and, depending on the vintage and transmit power level, vibrators, dynamotors or transistor inverter power supplies. Vacuum tube hand portables (pack sets as they were called) used either pencil tubes or the 1V series for low power stages and sometimes even output stages if my memory is correct. HV via a vibrator or with the really old stuff, a separate B battery.

    1. Jack Smith says:

      First sentence should say “How do …” not “How to”

  2. Erbo says:

    Optimist: “The glass is half full.”
    Pessimist: “The glass is half empty.”
    Engineer: “The contents are fine, the glass is just twice as big as it needs to be.”

  3. Bob Fegert says:

    Imagine someone setting a match to that pile of tumbleweeds in that 1964 image!$(KGrHqZ,!rgFBGhULrO7BQgijT1BTw~~60_12.JPG

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