Jazzy_Pidjay
Well-known member
Hi,
After searching for days and days about Neutralization, Grid Stopper
and Oscillation all over this and other places, i'm still strugglin'
So i decided to ask the question, i hope it's not already debatted here, in this case excuse me...
I'm about the end of the design of a mic preamp, a variation of the Asymptot/SlowBlow.
The first stage which is a 12SN7 give me some oscillations at about 2MHz
I tried differents gridstopper from 1k up to 39k right at the pin, and yes with 39k
which give a corner freq, with miller effect, etc.. of 46kHz...
i can still see some oscillation :?. The oscillation is pretty low, the smaller scale on my portable scope (only one i got) i believe it's less than 1mV.
I really ain't know any other tricks, and even if the oscillation is very low, i would like to kill it, both for the preamp and for my knowledge/understanding of that.
Any help will be very appreciated,
thanks :thumb:
After searching for days and days about Neutralization, Grid Stopper
and Oscillation all over this and other places, i'm still strugglin'
So i decided to ask the question, i hope it's not already debatted here, in this case excuse me...
I'm about the end of the design of a mic preamp, a variation of the Asymptot/SlowBlow.
The first stage which is a 12SN7 give me some oscillations at about 2MHz
I tried differents gridstopper from 1k up to 39k right at the pin, and yes with 39k
which give a corner freq, with miller effect, etc.. of 46kHz...
i can still see some oscillation :?. The oscillation is pretty low, the smaller scale on my portable scope (only one i got) i believe it's less than 1mV.
I really ain't know any other tricks, and even if the oscillation is very low, i would like to kill it, both for the preamp and for my knowledge/understanding of that.
Any help will be very appreciated,
thanks :thumb: