Comparing Attack and Decay of LP and Mini

The Moog Forum Little Phatty & Slim Phatty Forum
1

A good question for MC or some of the other EE types on this forum…

When I was comparing my Minimoog Model D to my new Little Phatty, one of the things that I found was that my Model D has considerably longer attack and decay times.

Both are listed in their technical specs as having attack and decay times of 10 miliseconds to 10 seconds.

In my super scientific manner of checking these respective times (one thousand one, one thousand two, one thousand…), I usually got to about 11 seconds for the Little Phatty. Close enough… When I checked the Minimoog Model D, I usually got to about 14 or 15–almost half again longer in the attack and decay.

My question is, were the Model D’s that far off of the specs on their attack and decay times, or is there something in the the aging of the electronics that causes the times to get longer?

2

My question is, were the Model D’s that far off of the specs on their attack and decay times, or is there something in the the aging of the electronics that causes the times to get longer?

Most of the capacitors are 20% types in the old Mini and after 30 years these parts can change the values too. I think this is normal.
Have fun,
Rudi

3

Rudi is right, component tolerances and aging will impact the decay/release times. And the model D has a minimum attack time of at least 2ms, not 10ms. The Voyager has an attack time of 1ms (I probed it on a scope from the VX-351 expander).