SV: [sdiy] NE572 using NE570 trick?

[karl dalen]

I put 5 cent on to use the 572, and the cap multiplier on the 
attac cap since rapid transients affects attac stage first
in the signal chain.

Nothing prevents you for using it on both capps, in fact
it could be advantageous even to have different charge
times from the cap mul.

You could use the PAIA vocoder trick by offsett the 
rectifier by the means of a Dc voltage at the cap.s.

REG
KD


--- jhaible at debitel.net skrev:

> Many NE570 circuits used a 2 opamp, two diodes circuit to
> form a level-dependent capacitance multiplier for the
> time constant capacitor. This helps to give fast reaction
> on large transients, while keeping distortion reasonable
> at more or less steady signals.
> 
> The NE572 has two separate capacitors (for attack and release),
> also to keep distortion low, while having fast reaction
> times on quickly rising levels.
> 
> Which method is better?
> 
> And more important, can the capacitance multiplier method
> also be used with the NE572? And if so, on which capacitor
> should it be used, attack, release, or even both?
> 
> Or does the separation of both time constants prevent
> the use of this helper circuit? Or make it unnecessary?
> 
> Let me know ...
> 
> JH.
> 
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