Home K&K Audio / Lundahl Transformers

Welcome! Need support, you got it. Or share youe ideas and experiences.

RE: Question re 6BX7GT in 300B push pull designs

The resonance(s) are a result of the interaction of the tube's parameters and the leakage inductance/stray capacitance of the transformer. If you had all of the necessary parameters for both parties, you could probably simulate the behavior to some unknown degree of accuracy, but the simpler way, in my view, is to choose the interstage transformer that has just enough primary inductance to provide the desired low frequency cut-off. Shooting for low frequency cut-offs at very low frequencies, just because you can, puts you in a position of choosing interstage transformers with higher leakage inductance and stray capacitance to get bass response that is likely irrelevant to real in-room performance.

In any case, the resonances can usually be minimized with a carefully chosen RC network across the entire secondary.

Kevin Carter
K&K Audio
www.kandkaudio.com


This post is made possible by the generous support of people like you and our sponsors:
  Parts Connexion  


Follow Ups Full Thread
Follow Ups
  • RE: Question re 6BX7GT in 300B push pull designs - KevinC 04:27:14 07/22/16 (0)

FAQ

Post a Message!

Forgot Password?
Moniker (Username):
Password (Optional):
  Remember my Moniker & Password  (What's this?)    Eat Me
E-Mail (Optional):
Subject:
Message:   (Posts are subject to Content Rules)
Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:  Automagically notify you when someone responds.