John Curl's Blowtorch preamplifier part II

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I have a silly question. How fast can you reliably drive a needle indicator? How fast can you get it to move into position and then stop exactly where it needs to be? Assuming you drive it with a network to compensate for needle mass?
To answer partially your question, just have a look of how Nakamichi (550) did-it (It was a nice peak meter for K7 tapes):
 

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I have a silly question. How fast can you reliably drive a needle indicator? How fast can you get it to move into position and then stop exactly where it needs to be? Assuming you drive it with a network to compensate for needle mass?
Very fast if designed right. There are pen recorders with MS response times.
Real program meters, VU or the simliar ppm have very precise dynamics. They predate brick wall recording tech (digital) so they don't catch true peaks. For that the computers beat everything.

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Very fast if designed right. There are pen recorders with MS response times.
Real program meters, VU or the simliar ppm have very precise dynamics. They predate brick wall recording tech (digital) so they don't catch true peaks. For that the computers beat everything.

Sent from my SGH-M919 using Tapatalk

keantoken read here on rate adaptive plotting, in general all the stuff in this article is pure genius engineering such a relief from the snake oil.

http://isis.poly.edu/~kurt/barrie_gilbert.pdf
 
In their day, open reel decks of better quality used to offer peak LEDs along with VU meters. They usually worked independently gfrom the VU mesters. My old Philips N4520 deck had two LEDs per side, +3 and +6 dB.

The fastest mechanical meters I ever saw were those MCI built into their studio machines. At times, it was faster than the eye could register them, but I hate to think how much that added to the price.

The fluo meters on my Sony TC-K808 ES are also lightning fast, it's fascinating just watching them work, but Sony had the good sense to include a peak hold function.
 
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