Tuesday, July 10, 2012

A puzzle / another silly thing we don't really need.


Once you get past the crappy picture, found box and the bakelite knob the only other clues are binding posts and an IR sensor so Chapman must be involved.  Looking inside things become clear as mud.


Power supply, remote handset and a motorized pot may get you all thinking.



A single pair of IC's and a clear view with the binding posts showing resistors across them might help a bit.  FWIW.... the value of the motorized alps is 10K and only two terminals are being used.  Those two terminals are connected (4 terminals total) and in parallel with the 4 terminals of the binding posts and the 4 terminals of the RCA's

so what the hell is this thing for?

OK.... Edit after 4 comments.  Martin G nailed what it is but my intended application is still the mystery.  the Key factor is adjustability from the listening chair.  In many instances it wouldbe used with these.






7 comments:

  1. It's a relativity condenser!

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  2. That my friend is a reality distortion machine, isn't it?

    Bring it to CAF and we can try it out after a few :)

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  3. Used to provide variable resistance to a circuit from your listening position? When you find the sound you like you measure the resistance at the setting and use that value in the circuit. I like the idea. Trying to think where it might be practical. Although I suppose everything doesn't have to be practical, does it? :)

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  4. Testing a preamplifier for freq and phase response under varying load conditions.

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  5. Well if it isn't for seat position remote control of cartridge/SUT loading then it certainly should be. What did I win?

    W

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  6. Winner winner.

    you get a free in house demo.

    d

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  7. Oooooh! Lucky me!

    W

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