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Preventing Hum/Noise in Amplifiers
Preventing Hum/Noise in Amplifiers
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Old 10th April 2017, 11:38 PM   #1
Bonsai is offline Bonsai  Europe
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Default Preventing Hum/Noise in Amplifiers

I have updated the original pdf that addressed this issue and added a lot of new material

http://hifisonix.com/wordpress/wp-co...-Autosaved.pdf

Hopefully this will generate some useful discussion on the hum/noise problem

Added material and updated 30th April 2017 based on feedback

Last edited by Bonsai; 30th April 2017 at 07:17 PM.
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Old 10th April 2017, 11:54 PM   #2
scottjoplin is offline scottjoplin  Wales
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Thanks, I shall read this and myself further ...probably ...seems a never ending search. Thanks again
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Old 11th April 2017, 12:06 AM   #3
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Old 11th April 2017, 12:14 AM   #4
Bonsai is offline Bonsai  Europe
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I think you've been hacked or have a malware issue. Just checked and everything is fine. There has never been an issue with my site and you do not have to drop any security to access content on my site.

DIYAudio cannot accept PDF files of > about 970kB
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Old 11th April 2017, 12:16 AM   #5
Bonsai is offline Bonsai  Europe
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Quote:
Originally Posted by scottjoplin View Post
Thanks, I shall read this and myself further ...probably ...seems a never ending search. Thanks again
All part of the learning process I am afraid
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Old 11th April 2017, 12:20 AM   #6
scottjoplin is offline scottjoplin  Wales
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I'm having no problem accessing
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Old 11th April 2017, 12:34 AM   #7
de Ocampo is offline de Ocampo  Philippines
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Bonsai,

Many thanks for the updates, I have followed the procedure on your pdf [the older version] when I put my P3A build to its chassis.It worked like a charm, tested it by placing a mobilephone on top of the chassis while the amp is playing music, gave it a ring and no audible noise interference happened in the background, music flows smoothly in the speakers. The transformer I used do not have a copper belly band but I'm using a mains AC line filter and a sofstart...

Sa muli,
Albert
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Old 11th April 2017, 01:48 AM   #8
Art M is offline Art M  United States
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Quote:
Originally Posted by Bonsai View Post
I think you've been hacked or have a malware issue. Just checked and everything is fine. There has never been an issue with my site and you do not have to drop any security to access content on my site.

DIYAudio cannot accept PDF files of > about 970kB

I don't Play Video Games like "Captcha"... "Gotcha".
The Insistence by BitchNinja.io for these escapades is Irritating.
I suggest you go and ask the Ninjas at BitchNinja why your site accesss has been Interfered with by them ?
You Know what is going on. If you ask they might supply you with Logs.

Files too Big for DiyAudio.com ? Part1... Part2...Part3....break it Down.
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Old 11th April 2017, 11:02 AM   #9
Ranchu32 is offline Ranchu32  Australia
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Originally Posted by scottjoplin View Post
I'm having no problem accessing
Me neither. Thanks Bonsai.
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Old 11th April 2017, 11:58 AM   #10
AndrewT is offline AndrewT  Scotland
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Nice write up with a variety of diverse topics.
Just scanning through it now.
Will return to read it properly soon. It deserves that.

Page 19 and 21 show the revised Speaker Returns. I prefer this due to reduced loop area.
Page 20 still shows the old version, where both channels Returns are taken to the "T".
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