Bybee Quantum Purifier Measurement and Analysis - Page 14 - diyAudio
Go Back   Home > Forums > General Interest > Everything Else

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

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
Closed Thread
 
Thread Tools Search this Thread
Old 31st August 2010, 09:20 PM   #131
diyAudio Member
 
tubelab.com's Avatar
 
Join Date: Jul 2005
Location: West Virginia panhandle
Quote:
Someone else will have to do all but the crudest RF measurements.
Guys, at this moment I am sitting in the middle (OK by a window) of a million dollar RF lab. RF design engineering is what I do for a living. Most of my work covers 100 MHz to 1GHz but I have equipment covering DC to 6 GHz. If you have any specific tests in mind, or just want them run on a network analyzer and compared to say a wire, a wire with one or more ferrite beads, and a resistor let me know.

Yes, I am a skeptic, but as an engineer I have an open mind. It was explained to me in another thread that I couldn't measure or hear the difference between a $2 power cord and a $200 power cord because my equipment wasn't revealing enough. OK, I'll accept that. And I will accept my non revealing system complete with the power cord off of an old computer AND the speaker wire from Walmart too. Of course if the QP's wind up here for testing they might find their way into my system, but I wouldn't expect my non revealing system to reveal anything earth shattering.
__________________
Too much power is almost enough! Turn it up till it explodes - then back up just a little.
 
Old 31st August 2010, 09:22 PM   #132
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Quote:
Originally Posted by exeric View Post

I think it is important to do the tests in a double blind way by unbiased listeners. But it has to be administered by someone who is equally unbiased. I think this makes sense. I would not ask to be the one who is in charge of this because I have previous experience which has formed an opinion in me about the Bybees. Similarly others who have formed a strong opinion should also not be in charge of this part of the testing. I am not asking for anything here but fairness in getting unbiased results.
If the tests are double blind, you can be as biased as you want, that's the whole POINT of controlled testing. You either hear a difference or you don't, irrespective of your preconceptions.

Man up and do it. Or come to our October 21 geekfest/concert where we'll have a pair and I'll let you DBT to your heart's content.


George, I'll be happy to send them along for RF testing as soon as I'm done in the audio and ultrasonic band.
__________________
You might be screaming "No, no, no" and all they hear is "Who wants cake?" Let me tell you something: They all do. They all want cake.- Wilford Brimley
 
Old 31st August 2010, 09:40 PM   #133
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi SY,
I was just about to mention that I also have an audio frequency network analyzer now. It's good to 51 KHz or so. My spectrum analyzer creaks up to 40 MHz.

George, you're a lucky devil! I really want to see what you come up with there. BTW, a million dollars is relatively easy to spend on good RF gear. At this price point, there isn't much you can't detect because your equipment certainly is revealing enough. Your skeptic doesn't know what they are talking about at all.

-Chris
__________________
"Just because you can, doesn't mean you should" my Wife
 
Old 31st August 2010, 09:45 PM   #134
exeric is offline exeric  United States
diyAudio Member
 
Join Date: Mar 2008
Quote:
Originally Posted by SY View Post
If the tests are double blind, you can be as biased as you want, that's the whole POINT of controlled testing. You either hear a difference or you don't, irrespective of your preconceptions.

Man up and do it. Or come to our October 21 geekfest/concert where we'll have a pair and I'll let you DBT to your heart's content.

Good. As far doing the double blind testing myself, I have neither the time or energy to do it. I should say this: it requires great familiarity with a piece of equipment to be able to notice subtle changes for worse or better. I hope you are not planning on doing the test at the Geekfest. I think the listening test should be done on very good unmodified equipment that observers have had several days preferably weeks to familiarize themselves with on different varieties of music. One's mind and ear has to narrow in on the positives and negatives of a system beforehand. This takes time. Only then should the double blind listening test occur, presumably on equipment in which one of the two presented identical systems has had the QP installed. If there is a difference it should be noticable. Equally important is the listeners overall conclusion of which of the otherwise identical systems he prefers listening to.

Actually now that I think about it a modification should be to this test procedure. An equal number, but different listening group, should get their several day familiarization on an identical but modified system. When the actual double blind test occurs some will notice that one system sounds slightly worse than they remembered it. The other group will find that one system sounds slightlly better than they remember it. That is provided they hear a difference.

Last edited by exeric; 31st August 2010 at 10:01 PM.
 
Old 31st August 2010, 09:58 PM   #135
hates ground loops
diyAudio Member
 
Rodeodave's Avatar
 
Join Date: Dec 2004
Location: in the alps
Blog Entries: 1
I can't believe this is actually happening, it's just too good to be true. And I have a couple of (weird?) questions:

How will the devices be placed in the signal path? Screw terminals? Solder? How much heat can they take? Stuff like that is usually covered by a datasheet...
I suppose at some point there has to be RCA/BNC/SMA/whatever connector to connect to the equipment, so...how will this connection be made? I'm just curious because it probably should be reversible. How do solder joints behave at high frequencies? Maybe also test a wire with two solderjoints then...

And isn't it unusual for RF labs to have windows?
__________________
Gravity - Making the G since 13.7 billion B.C.
 
Old 31st August 2010, 10:07 PM   #136
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
I believe that my Altec 288 drivers on 1005 horns should be revealing enough for a test like this. If you can't hear it there, it's going to be hard to hear it anywhere. And I know the system very well.
Unfortunately I do not know how to set up a good double blind test. Any help there would be welcome. I have no expectations of the outcome.

Good questions about the connections, I was wondering the same myself. I saw nothing on the Bybee website about this.
__________________
Take the Speaker Voltage Test!
 
Old 31st August 2010, 10:14 PM   #137
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Pano, I'll outline a procedure for you when you're here.
__________________
You might be screaming "No, no, no" and all they hear is "Who wants cake?" Let me tell you something: They all do. They all want cake.- Wilford Brimley
 
Old 31st August 2010, 10:14 PM   #138
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Any good connection used in RF work will be fine. That includes soldered connections using a lead based solder (for high rel). Heck, stick one end in a waveguide and use it's terminal as the antenna. How's that for direct?

George can determine differences in wire dimensions fairly easily. He can also excite the Bybee to find it's self resonant frequency in the event that SY's gear doesn't reach those frequencies. A creative mind with the right test equipment can learn the secrets (if any) for any "black box". After all, the Bybee is a black box device.

-Chris
__________________
"Just because you can, doesn't mean you should" my Wife
 
Old 31st August 2010, 10:19 PM   #139
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Quote:
Originally Posted by panomaniac View Post
I believe that my Altec 288 drivers on 1005 horns should be revealing enough for a test like this. If you can't hear it there, it's going to be hard to hear it anywhere. And I know the system very well.
Unfortunately I do not know how to set up a good double blind test. Any help there would be welcome. I have no expectations of the outcome.

Good questions about the connections, I was wondering the same myself. I saw nothing on the Bybee website about this.
By reading those lines ''Once in a life time there comes along a technology that breaks new ground and is easily worth its weight in gold. Such is the case with the Bybee Quantum Purifier.'' & ''if there ever was a no-brainer recommendation, the Bybee Quantum Purifier is it. I can't imagine listening to my system without them.'' from D. Olser's review, I would suppose it will be clear to pick it up. He is just talking about putting those in line with a Lowther DX4 and then with its helper woofer. Nothing too exotic.
 
Old 31st August 2010, 10:41 PM   #140
hates ground loops
diyAudio Member
 
Rodeodave's Avatar
 
Join Date: Dec 2004
Location: in the alps
Blog Entries: 1
Frankly I don't really care so much how the QP's sound. This thread is awesome because here it's about measurement (taking data) and analysis (interpreting data). The data will express how the device performs in terms of well established units of measurement, like Volts, Amperes and Herz. If calibrated equipment is used to derive these characteristics, then we'll know what the device does within certain boundaries (aka error). Repeatable, anytime, anywhere. That's why people have established these standards of measurement. Listening (unfortunately) is not one of them.
If these devices do something it must/will show. If there's one thing I've learned it's that the atoms don't lie.
__________________
Gravity - Making the G since 13.7 billion B.C.
 

Closed Thread


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
Info on Bybee Quantum Purifiers needed Peter Daniel Everything Else 68 19th December 2012 08:28 AM
Bybee Quantum Purifier Experience. mrfeedback Everything Else 321 27th August 2010 09:41 PM
diy bybee quantum purifiers? mbl Power Supplies 549 16th April 2010 10:38 PM
measurement and analysis tools D_Dubya Full Range 12 31st May 2008 02:07 PM


New To Site? Need Help?

All times are GMT. The time now is 06:15 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