diyAudio (
-   Power Supplies (
-   -   EI or double-C core for class A Amp? (

jeepy 6th October 2012 04:54 PM

EI or double-C core for class A Amp?
Hi All,
I asked some companies for custom transformers and the price for double -C is significantly higher compared to EI core even if they are a bit smaller in size. Is there any benefit using the more expensive ones for class A amplifiers? I am assuming that unlike for class AB amps, the current trough the windings is almost constant. On top of that, the Pi filter CRC or ClC 0.2 to 0.4F total capacitance. I do not want use toroids for this application and I can't have custom R-core ¨made for my application.

jcx 6th October 2012 05:55 PM

for a capacitor input supply the mains transformer current is narrow spikes at the rectified line V peaks, many times the average load current to recharge the caps

a large choke can smooth the peak transformer current - but typically has to be similar physical size to the transformer to store enough energy in its mag field

All times are GMT. The time now is 03:44 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
Copyright ©1999-2016 diyAudio

Content Relevant URLs by vBSEO 3.3.2