Carrier frequency bridge - Unknown device

Discussion in 'Wireless & RF Design' started by telec16, Jun 16, 2016.

  1. telec16

    Thread Starter New Member

    Oct 28, 2014
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    0
    Hello,

    I found this in a dump:
    IMG_20160616_175021563.jpg IMG_20160616_175038494.jpg

    Does anyone know what this is ?

    Thank for any help.
     
  2. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
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    It's a bridge for a transducer like a strain gauge or thermocouple. To avoid drift, a low frequency AC (chopped) signal is used instead of DC.

    Looks pretty clean.....well worth fixing up if it needs fixing.
     
  3. telec16

    Thread Starter New Member

    Oct 28, 2014
    2
    0
    Thank you.

    It actually works, I managed to use the left part of the 'Bridge Supply' selector with a Wheatstone bridge, but I have no idea how to use the right part, the half-bridge...

    It's pretty big, I wonder what kind of application needs that (unless there are no other choices back in the days ?).
     
  4. EM Fields

    Member

    Jun 8, 2016
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  5. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
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    +You haven't seen a big bridge till you've lugged around a General Radio 916. :)
     
  6. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
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