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Do it Yourself How to Measure Wattage

April 17th, 2014

Mic Kaczmarczik’s How to Measure Wattage Information

How to Measure Wattage


Do it Yourself

How to Measure Wattage

This directory contains USENET articles Mic has saved about guitars, equipment, pickup, techniques, players, and so on. Mic has graciously granted permission to post the stuff on the JT30 page on the off chance that it might be useful in the context of Blues Harmonica. Mic is not responsible for the content, just the collection.

Do it Yourself

How to Measure Wattage

How to Measure Wattage

From rfrie–(at)–etcom.com Sat Dec 28 17:39:19 CST 1996
Newsgroups: alt.guitar.amps
From: rfrie–(at)–etcom.com (Robert Fries)
Subject: Re: Mark Garvins SF-BF suggestions.
Sender: rfrie–(at)–etcom13.netcom.com
Date: Sat, 28 Dec 1996 23:15:10 GMT

cmiy56–(at)–pcf.cc.utexas.edu (Thomas C. Clancy) wrote:

>>For the expected voltage at the speaker, the following formula will
>>be of assistance:
>>
>>P =(Vp-p)^2 / (8*R)
>>
>>which means: Power equals the peak-to-peak voltage squared, divided by eight
>>times the resistance.

>Well, they usually list watts as RMS, root mean squared.
>I don’t think this is the same as peak to peak voltage.

RMS IS root mean squared; anyway, this is the correct formula for deriving the
RMS power of a sine wave from a peak-to-peak voltage measurement through a
known resistance. It includes the conversion between a peak-to-peak
measurement and the RMS voltage.


RF






*****************
Robert Fries
415-988-9475
rfrie–(at)–etcom.com
*****************






 

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