Project 3A fusing problem - Page 4 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 10th August 2002, 12:49 PM   #31
diyAudio Member
 
annex666's Avatar
 
Join Date: Jul 2002
Location: England
Quote:
Originally posted by Bill Fitzpatrick
I always say, "If you're tired of your 5amp fuses blowing, wire a 4amp fuse in series with it."
Now that's more like it.

A good designer always protects the output transistors, speakers and fuses - people all too often neglect to protect their expensive fuses from blowing.
  Reply With Quote
Old 12th August 2002, 07:50 AM   #32
swede is offline swede  Switzerland
diyAudio Member
 
swede's Avatar
 
Join Date: Sep 2001
Location: Geneva, Switzerland
Well,

I'm getting more and more into the idea on always using a slow start circuit and only one (pretty small) fuse, on the input (220/110 AC) post. That way, you won't have any current at all on any rail if the fuse goes. Just make sure the fuse is "small enough". Fuses are cheap. The trick is to make them not to go off when you turn the amp on.

//magnus
  Reply With Quote
Old 12th August 2002, 02:15 PM   #33
diyAudio Member
 
mrfeedback's Avatar
 
Join Date: Feb 2002
Location: Perth, Australia.
Default Fuse Types

Fuses are available in 3 ratings - fast, delay (T), and slow blow, and sand filled ceramic.
T type fuses are standard in commercial audio, video and television equipment, and will withstand turn on transients.
They are indentifiable by a small solder bead on the fuse wire, and stamped on the end cap with the designation for example - 250 V 2AT.
Another high surge rated fuse type is the ceramic bodied, sand filled fuses as used in microwave ovens.

Eric.
  Reply With Quote
Old 24th August 2002, 10:49 AM   #34
diyAudio Member
 
annex666's Avatar
 
Join Date: Jul 2002
Location: England
Default Re: Velleman K4700

I'm thinking of employing the Velleman in my P3A variant amp that's currently on my workbench - would it be worthwhile sacrificing the turn-on anti-thump protection and placing the relays on the power line instead of the speaker line?

The relays claim to be be 10A which should be ok for the amp if not driven hard right?

Would this setup work? If it does surely it would protect all components (appart from the one that failed in the first place) and the speakers too?
  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
FS: Car audio fusing hardware Rybaudio Swap Meet 0 11th July 2007 09:09 AM
Fusing a Battery Supply? mourip Class D 5 2nd February 2006 10:22 PM
Fusing my Boost Converter ChocoHolic Power Supplies 7 24th August 2005 05:31 AM
Aleph30 vs LeachAmp: PS Fusing swede Pass Labs 2 13th July 2002 04:56 AM


New To Site? Need Help?

All times are GMT. The time now is 01:08 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