psu problem - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 24th April 2004, 09:50 PM   #11
EC8010 is offline EC8010  United Kingdom
diyAudio Moderator Emeritus
 
EC8010's Avatar
 
Join Date: Jan 2003
Location: Near London. UK
Quote:
Originally posted by metebalci
PS: What does True RMS DMM measure for a Vdc + Vac potential, I have seen different definitions for this?
The only definition of RMS is that it is the DC amplitude (current or voltage) that would give the same heating effect as the AC waveform. It is calculated by taking the Root of the Mean of the Squares. At RF, it is measured using a thermocouple to measure heating effect.

In most cases, you don't need a true-RMS DVM. The only time you need one is if you are concerned about heating effect and your waveform is distorted. We don't like distortion in audio, so a cheap and cheerful mean-sensing calibrated RMS of sine wave meter will do perfectly well. That is, any old 15 junk.

My true-RMS meter (I wanted a 0.025% accuracy meter, and true-RMS was included) can display the AC and DC components independently, which is occasionally useful.
__________________
The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...
  Reply With Quote
Old 25th April 2004, 09:15 AM   #12
diyAudio Member
 
Join Date: Feb 2004
Location: Istanbul/TURKEY
Thanks so much...

MB
  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
mtx amp problem [[help!!]] fuzzypinkhat45 Car Audio 3 8th July 2008 05:34 AM
CDM 2/29 Problem HELP! Bassivus Digital Source 29 23rd December 2007 10:00 AM
FRD/ZMA Problem Twisted85 Multi-Way 5 4th December 2006 01:19 PM
p3a problem MaXiZ Solid State 17 16th July 2005 07:14 AM


New To Site? Need Help?

All times are GMT. The time now is 06:43 PM.


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