500 Series - One slot - VPR - EMI TG1 Limiter

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Niketouille

Well-known member
Joined
Apr 22, 2009
Messages
156
Location
France
Lords, ladies and gentlemen, boys and girls,
Teasing today a design I am working on, a 500 format clone of the EMI TG12345 Channel Zener limiter.
It comes from the mk2 mixing desk and is the same as the mastering version with a different output amplifier.

EWI.jpg


Here are the specs:
- IC balanced I/O
- Run from +/-24V or +/-16V with an onboard boost converter
- VPR compliant
- 12 steps release time & 3 steps attack time
- true bypass & stereo link

Some may have notice a small star on the attack switch. It is a sidechain mod that crush the audio far more effectively than the usual “disconnect the sidechain” feature.

As I like options, I have added internal jumpers to set:
- Input level range
- Distortion limiter bypass
- Attack time value
- Ground to chassis connection
- Calibration mode and test points

So it is identical to the original unit with added features and flexibility and fitting one slot of the convenient 500 format. Still a few details to refine but it is almost there. Any comment or suggestions are more than welcome.

Cheers,
NkT
 

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