Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Circuit breaker for amplifier
Circuit breaker for amplifier
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 20th November 2019, 09:42 AM   #21
edbarx is offline edbarx  Malta
diyAudio Member
 
Join Date: May 2018
The major problem is lack of space. This modified amplifier is the perfect example of a product designed to be modification-repair hostile to the fullest sense of the phrase. There is NO space for fuse carriers, let alone a separate protection circuit!

To create some space, I have to literally make two small PCBs to mount on the main heatsinks. However, these require thick connecting wires to and from the rails. Meddling with high oscillating currents at rail voltages is asking for more interference issues.

There is a very drastic 'solution' to all this, but this, requires an overhaul of how the circuitry is mounted. This is by redesigning a PCB to hold every component and using a thick (12mm) aluminium bar to conduct heat away from the output transistors to the heatsink. In such an arrangement, the output stage transistors would be mounted in the middle of a long PCB. I have seen amplifier PCBs like that by Yamaha, but the large output pairs are mounted on the outer edges of the PCB along its longest sides.

Some years ago, someone wrote that workarounds are often ugly. I must write, in this case, he was right!

The original amplifier by Wharfedale (S1500), had only one fuse per amplifier module connected at 0V, instead of at the positive and negative rails. This means, in the event of a fault, the fuse would be blown but the amplifier output stage would still have the full rail voltages.
__________________
Thanks for helping me design my first amplifier.

Last edited by edbarx; 20th November 2019 at 09:54 AM.
  Reply With Quote

Reply


Circuit breaker for amplifierHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Threshold Stasis 3 power switch/circuit breaker replacement spaceysounds Pass Labs 5 21st April 2019 10:06 PM
Inrush current tripping circuit breaker Welcome Solid State 15 17th April 2016 03:04 PM
Airpax circuit breaker dress nut ralphs99 Parts 0 8th April 2015 02:38 AM
Circuit breaker help. ericaction Tubes / Valves 3 6th July 2013 09:08 AM
Tweeter protection circuit breaker sizing hydraudio Parts 0 7th March 2012 02:08 AM


New To Site? Need Help?

All times are GMT. The time now is 09:06 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki