Help calculating RC values for rectifier snubber - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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
Reply
 
Thread Tools Search this Thread
Old 30th January 2003, 07:25 PM   #1
Eric is offline Eric  United States
diyAudio Member
 
Eric's Avatar
 
Join Date: Nov 2000
Location: Central PA, USA
Default Help calculating RC values for rectifier snubber

I've completed my a40 amp, and now have a nice little humming sound coming through my speakers - I've been thinking about this and concluded it would me much nicer to hear the music rather than "hhhhhmmmmmmm....".

I'm fairly certain I do not have a ground loop, so my next area to look at involves putting a snubbing circut in my bridges. I've found lots of references to calculating optimum snubbers here, and have reading through it.

My problem, however, is that I can't seem to add correctly - perhaps someone can help me out here: On the bottom of page 9 there are two formulas, one for Rs and the other for Cs. Trouble is, using the numbers in the articles, I cannot even duplicate the values in the example


For example, the article calculates Rs by taking the square root of (0.113mH/600pF) and gets a value of 471 ohms. When I take the root of (0.113mH/600pF), I get 0.01488!

I know I'm missing something stupid, like units conversion or something... Any help?

Thanks!
Eric
  Reply With Quote
Old 30th January 2003, 08:07 PM   #2
diyAudio Member
 
Join Date: Sep 2002
Location: Göteborg
Cool Units...

You are right on the money. It's a unit thing.
0.133mH is 0.000133 H (or 0.113 milliHenry), NOT
0.113 microHenry (in this case at least!). People seem to use m for micro sometimes as
well which adds to the confusion.



/Niclas
  Reply With Quote
Old 31st January 2003, 07:57 PM   #3
Eric is offline Eric  United States
diyAudio Member
 
Eric's Avatar
 
Join Date: Nov 2000
Location: Central PA, USA
Thanks, Niclas! Now my numbers are working!
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Snubber network and the values okina Power Supplies 9 23rd September 2009 12:12 AM
calulating snubber values Ted205 Chip Amps 2 11th September 2008 07:10 PM
Generic snubber values: fixed-/variable-voltage regs hollowman Power Supplies 44 28th April 2008 11:09 PM
Calculating a stepped attenuator resistors values... youyoung21147 Parts 3 13th June 2005 08:07 AM
Calculating resistor values pk386 Solid State 4 10th April 2005 03:57 PM


New To Site? Need Help?

All times are GMT. The time now is 03:09 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2