Wow & Flutter test 4 Amplifiers !

Zero D · 9th May 2013, 01:23 PM

WOW indeed ! And it's not April the 1st either

Quote:

P7-5 New Techniques for Evaluating Audio Amplifiers via Measuring for Induced Wow and Flutter and Differential Phase Distortions—Ron Quan, Ron Quan Designs - Cupertino, CA, USA
In the past, mechanical systems were measured for Wow and Flutter or frequency modulation but not amplifiers. Instead, amplifiers are typically measured for intermodulation and harmonic distortion. A new method for audio amplifier/device performance measures frequency modulation effects and differential phase distortion. Frequency and phase detectors are used to evaluate induced frequency and phase modulation from an amplifier under two conditions. The first condition has a low frequency signal inducing the modulation on a high frequency signal. The second condition has a high frequency AM signal inducing the modulation on a lower frequency signal. Practical design topologies for the new test methods are shown and the results of the new testing methods are tabulated.

http://www.aes.org/e-lib/browse.cfm?...&papernum=8194

Should be interesting to see what they discover etc.

mickeymoose · 9th May 2013, 02:56 PM

Interesting! Marrying taperecorder principals with colour TV broadcasting technology. Get to work AP! My shares will go up! E

JMFahey · 07:00 PM

They *already* invented COLOUR TV?

You must be kidding!!
Stop reading Science Fiction, it'll burn your brain

As of Mr Ron Quan, I humbly suggest he invents more useful and urgently needed Scientific Devices, including but not limited to:
(These are just examples)

1) a Thermometer to measure fever in fish and reptiles.

2) a Radar navigation system for flying turtles, snails and elephants, so they can land safely at night or in bad weather, even in unmarked Airports.

3) a GPS based location system, permanently attached to Mount Everest, so it's easy to find it when it goes hitch hiking.

4) ..... add your own .....

EDIT: in Argentina we have a popular saying: "más inútil que cenicero en moto" = "more useless than an ashtray in a motorcycle".
Maybe some of that applies here

gmphadte · 10th May 2013, 04:35 AM

Non-rechargeable solar powered torch.

Zero D · 10th May 2013, 03:02 PM

@ JMFahey

I did give a

I posted it as i found it peculiar that people research stuff like that. Plus i'm surprised that AES are allowing it ! I don't expect we'll get anything useful out of it, but ya never know !

Also i just happened to notice it close to soomething else i was looking at.

LOL, yeah it's a while since i've heard about the ashtray on a motorbike Good one

9th May 2013, 06:58 PM	#3
JMFahey diyAudio Member Join Date: Mar 2009 Location: Buenos Aires - Argentina	They already invented COLOUR TV? You must be kidding!! Stop reading Science Fiction, it'll burn your brain As of Mr Ron Quan, I humbly suggest he invents more useful and urgently needed Scientific Devices, including but not limited to: (These are just examples) 1) a Thermometer to measure fever in fish and reptiles. 2) a Radar navigation system for flying turtles, snails and elephants, so they can land safely at night or in bad weather, even in unmarked Airports. 3) a GPS based location system, permanently attached to Mount Everest, so it's easy to find it when it goes hitch hiking. 4) ..... add your own ..... EDIT: in Argentina we have a popular saying: "más inútil que cenicero en moto" = "more useless than an ashtray in a motorcycle". Maybe some of that applies here Last edited by JMFahey; 9th May 2013 at 07:00 PM.

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9th May 2013, 02:56 PM	#2
mickeymoose diyAudio Member Join Date: Nov 2008	Interesting! Marrying taperecorder principals with colour TV broadcasting technology. Get to work AP! My shares will go up! E

10th May 2013, 04:35 AM	#4
gmphadte diyAudio Member Join Date: Jul 2003 Location: Dona paula, Goa	Non-rechargeable solar powered torch.

10th May 2013, 03:02 PM	#5
Zero D diyAudio Member Join Date: Aug 2009	@ JMFahey I did give a I posted it as i found it peculiar that people research stuff like that. Plus i'm surprised that AES are allowing it ! I don't expect we'll get anything useful out of it, but ya never know ! Also i just happened to notice it close to soomething else i was looking at. LOL, yeah it's a while since i've heard about the ashtray on a motorbike Good one