John Curl's Blowtorch preamplifier part II

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Not new on science but here is The string theory explained for mortals…

TED. The universe on a string. [VIDEO]

Tony
The Big Bang Theory episode that had a brief appearance by Greene was on recently in reruns. And last night they reran the one where Sheldon and Leslie Winkle were sparring about string theory versus loop quantum gravity, about which Leonard's ambivalence became a deal-breaker for their having kids. Quite amusing.
 
bcarso,
That is with the voicecoil in the magnetic field or external to the field?
It's a test fixture for measuring voice coil d.c.r. under heavy drive by extracting the voltage drop due to a probe current while a large a.c. signal is driving the loudspeaker under test. But as well the fixture will provide r.m.s. current and voltage and true power (average of instantaneous i * v) in the manner of a Valhalla-like meter.

So, yes, the voice coil as part of the assembled and magnetized loudspeaker driver.
 
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