The Brush Development Co. BL-905. What is it? - diyAudio
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The Brush Development Co. BL-905. What is it?

Posted 9th January 2012 at 10:41 AM by tonekwest

I have what looks to be an amplifier of some sort and was wondering if any of the forum members may be familiar with what I actually have. So far, my search results have come up with nothing.
It is from the Brush Development Company. Type BL-905. Will try to post list of tubes in the unit tonight.
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Comments

  1. Old Comment
    Here is a link to more pics of the amp.
    Brush Development Co pictures by tonekwest - Photobucket
    permalink
    Posted 9th January 2012 at 10:55 AM by tonekwest tonekwest is offline
  2. Old Comment
    rjm's Avatar
    It's probably a direct-coupled oscillograph amplifier. It's a voltmeter and the output would move the pen of a plotter. Probably late 40's.

    Link to IEEE article, subscription required.
    permalink
    Posted 13th January 2012 at 05:31 AM by rjm rjm is offline
    Updated 13th January 2012 at 05:36 AM by rjm
 
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