Speaker delayed insertion, speaker protector, off set sensor - Page 3 - 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 9th July 2010, 06:25 AM   #21
diyAudio Member
 
Join Date: Jan 2010
Default The soft Start Circuit Looks Brilliant

I have tested one like this on a Veroboard, with Two Relays unlike most with only one Relay, and Op Amp driving a Transistor, works really well, I adapted the design by Rod Elliot, it uses three Power resistors, and I have separated the resistors and the Relays from the main board because I though it was safer. I think Ill etch a board of this also Carlos, thanks so much for sharing
  Reply With Quote
Old 9th July 2010, 06:30 AM   #22
diyAudio Member
 
Join Date: Jan 2010
Come to think of it this design looks very similar to the one I built, I used Three 5W resistors unlike this one uses a single 50W one (will be expensive and hard to find), This design works carlos, but ill build this and see just in case
  Reply With Quote
Old 9th July 2010, 09:06 AM   #23
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default This one have not worked fine... was not aproved Zeraphine

i do not think it is a good idea to try it.

I had problems related the timing, the DC sensitivity was not good, the relay have not closed contact in a decided way...one of them seems had vibrations during the operation.

I had tweaked but i really dislike the circuit....very unprecise...... i have stopped and decided to design my own by myself.

I never did that, as i am not too much motivated, i do not think they are really needed, fuses can do a nice job too...all my life i have used fuses and i have never regret about..so..i do not have good reasons, personally, to make it.

I gave a try on that because a book circuit, from a good designer...i was not satisfied.

Dx Blame does not have power on noises...so.... circuits not needed to mute it.....it is already silent..... the board has already fuses and i use to suggest people to use fuses....2.5A in series with the output line (to speaker) when using 8 ohms and 5.0A in series with the output line to 4 ohms.

I have made it because forum friends, as there are a lot of guys that likes these protections...was not for me.... as i am not motivated i have stopped to work on that.

Search for one schematic if you want..assemble, test and use it if you want....but do it under your own risk.

regards,

Carlos
__________________
A Darlington audio amplifier, a toy for your weekend enjoyment; https://www.youtube.com/watch?v=yk0qvkwsAOY, No overshot; https://www.youtube.com/watch?v=CEgK4l0MH8k
  Reply With Quote
Old 9th July 2010, 01:03 PM   #24
Mitchel is offline Mitchel  Brazil
diyAudio Member
 
Mitchel's Avatar
 
Join Date: Aug 2008
Hello zeraphine,

Instead of the 50W aluminum housed resistor, you can use a NTC thermistor, lice CL-60, and the delay time can be set longer, by raising R1 value. This circuito is based around Rodd Elliott design, as you have already mentioned, and works very very well.
  Reply With Quote
Old 9th July 2010, 04:21 PM   #25
diyAudio Member
 
Join Date: Jan 2010
Hey Mitchel.

Thanks for the Info I will Try a NTC Thermistor, keep up the good work...
  Reply With Quote
Old 9th July 2010, 04:24 PM   #26
diyAudio Member
 
Join Date: Jan 2010
Default Understood Carlos

Im currently trying out the DC protection and Muting Circuit designed by Rod Elliot, I know what you mean, I actually dont need muting also, but Itll be really handy to have DC protection if something on the Amp fails itll protect my speakers at least, keep on posting your findings carlos,

Regards
Zeraphine.
  Reply With Quote
Old 9th July 2010, 04:52 PM   #27
diyAudio Member
 
andrewlebon's Avatar
 
Join Date: Feb 2008
hi zeraphine
greetings see edwin paijs home page very nice compact dc
protector
thanking you
andrew lebon
  Reply With Quote
Old 9th July 2010, 04:54 PM   #28
diyAudio Member
 
Join Date: Jan 2010
Quote:
Originally Posted by andrewlebon View Post
hi zeraphine
greetings see edwin paijs home page very nice compact dc
protector
thanking you
andrew lebon
Can you please send me a link, thanks in advance
  Reply With Quote
Old 9th July 2010, 05:01 PM   #29
diyAudio Member
 
Join Date: Jan 2010
Ok I found the site, thank a lot Andrew, a very informative site...
  Reply With Quote
Old 9th July 2010, 05:07 PM   #30
diyAudio Member
 
andrewlebon's Avatar
 
Join Date: Feb 2008
hi zeraphine
greetings change transistors to bc 547 bc 557 instead of bc 550 bc560

thanking you
for soft start see thread h class 900 watt have deciphered rod elliots soft start with small pcb andrew lebon
  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
First speaker set wb8723 Multi-Way 1 15th June 2008 11:28 PM
Speaker Protector With MOSFET IrishboyM4 Solid State 2 23rd April 2007 10:49 PM
Speaker protector gaminn Parts 0 9th April 2006 04:43 PM
5 speaker set any good? Beano_The_Bimbo Multi-Way 1 17th October 2004 09:06 PM
Aleph 2 speaker protector? tomchaoda Pass Labs 9 8th January 2004 08:53 PM


New To Site? Need Help?

All times are GMT. The time now is 09:05 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