Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

How to suppress spikes on power supply
How to suppress spikes on power supply
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 14th February 2004, 12:34 PM   #1
kmt is offline kmt  Germany
diyAudio Member
Join Date: Dec 2003
Location: Hamburg
Default How to suppress spikes on power supply

Hello to everyone!

I've a question concerning spikes on power supply: I've built up a headphone amp using a NE5532A and two BUF634. It works pretty good, very low noise etc. The only problem is the power supply. The PCB is powered by +/- 15V. For the power supply I used a toroidal transformer (30VA, +/- 15V) connected to a rectifier B40C3300. The +/- Va outputs of the rectifier are connected to 2 capacitors 1000µF.

I use 7815/7915 regulators to generate the voltages for the headphone amp. Inputs and outputs of these Vregs are connected to GND via a 100nF capacitor. Output is stabilized by a 220µF cap. The ripple voltage of the supply is very low, but I have switching spikes at the V+/V- when I turn on/off other electrical equipment (e.g. soldering station etc.)

My question is: what's the best/easiest way to suppress switching spikes on the power lines?

Any hints would be helpful


  Reply With Quote
Old 14th February 2004, 12:50 PM   #2
Pjotr is offline Pjotr
diyAudio Member
Pjotr's Avatar
Join Date: Nov 2002
Location: Netherlands
Hi Kai,

For a headphone amp best is to use NOT a toroidal transformer but one that has inherently better PSU noise suppression. Use trannies with a U-shaped core and complete separated windings. These are available in Germany from Hahn transformers and Block. But Hahn is better quality IMHO.

You can start with a 250V VDR noise suppressor (“Transzorbs” and the like) across the mains if there is a lot of mains pollution. Use a big enough one of at least 25 mm diam. Ready-made spike and noise suppressors are available from a computer store.

  Reply With Quote


How to suppress spikes on power supplyHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
metal cone resonances, what direction, how to suppress? capslock Multi-Way 36 5th September 2013 06:36 AM
PFC voltage spikes tstitans Power Supplies 8 10th August 2009 06:34 PM
simplest way to suppress resonance peak ? percy Multi-Way 2 25th October 2006 04:29 PM
Ultra linear g2-anode suppress richwalters Tubes / Valves 3 30th November 2003 05:49 PM
heater supply (xformer specs are 6.3V 2.5A) as supply for a power LED? jarthel Tubes / Valves 10 21st July 2003 01:30 PM

New To Site? Need Help?

All times are GMT. The time now is 12:49 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio