Industrial 12V PWR supply to be used with T-amp - Page 4 - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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 1st August 2005, 09:46 PM   #31
diyAudio Member
 
sx881663's Avatar
 
Join Date: Nov 2003
Location: so. ca.
!
One more example and I will let it rest, agreeing to disagree. A customer wanted his old Bose 901 EQ upgraded. The original unit had a lot of residual noise including line freq artifacts. Upgrading most of the parts and regulating the power helped a lot but it still was too noisy. The next step was putting in a quality toroidal transformer. This also helped but still was unacceptable as it needed to be in the same case. The final solution was the input regulator was removed and a small switcher was installed feeding the circuit directly with the same filter caps left in. This solved the problem almost completely. It was now perfectly acceptable to the customer. This particular circuit is single ended and high impedance to boot. It is extremely sensitive to all types of noise. The SMPS was the only solution outside of a remote supply that would work.
Roger
__________________
Happiness is being owned by a cat
  Reply With Quote
Old 1st August 2005, 10:23 PM   #32
! is offline !  United States
diyAudio Member
 
Join Date: Jun 2005
Location: Midwest
There are too few specifics to draw a conclusion about a particular application, IMO, but a complete consideration of where the noise came in and what type of filter was needed, would be necessary.

IMO, if there was noise with a linear it wasn't because it was a linear rather than a switcher, rather that whatever filtration was necessary to remove that noise, happened to be incorporated into the switcher above and beyond the bare-bones referect design of it. Same goes for a linear. Since we had a situation where the incoming power to the supply was probably too noisey, a typical line filter in front of the linear would've likely been sufficient. Apples and oranges.
  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
industrial music for industrial people Stan Gielewski Music 45 8th October 2008 04:34 PM
industrial screws in wood karma Everything Else 82 14th April 2006 03:22 PM
Industrial SMD Gainclone - group buy peranders Group Buys 325 7th January 2006 08:24 AM


New To Site? Need Help?

All times are GMT. The time now is 05:02 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