Home Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ Tube DIY Asylum ]
[ Alert Moderator ]

Chokes and Caps

"A steady current passes through the coil, when the flow is interrupted an large surge of energy is released."

Yes, that's the same mechanism, but you're describing what happens when the load suddenly draws *less* current. Under those conditions, the field collapses, and voltage at the output of the choke spikes. The opposite occurs if the load draws more current (an action that can possibly drain the last capacitor). The magnetic field then grows larger, and the choke's output voltage momentarily dips. Both these actions are the inverse of what we want.

To expand on this concept, there is a camp on this forum that eschews large filter caps. Regardless of the reason for that preference, reducing the values of filter caps (particularly the last cap) requires that the choke's constant current mechanism be similarly reduced. Otherwise, output voltage will swing wildly in response to the amplifier's changing current demands. The downside to these Low-C, Low-L designs includes reduced energy storage and less effective filtering, and they can be significantly more susceptible to line noise, ripple, audio-band resonances and intermodulation effects. The latter is sometimes mistaken for increased bass response and "speed."




Edits: 01/19/15
This post is made possible by the generous support of people like you and our sponsors:
  Parts Connexion  

Follow Ups Full Thread
Follow Ups
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.

[ Top Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2024, Audio Asylum, all rights reserved ]
[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]