Car Amp - 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 30th September 2002, 01:04 AM   #1
Account Disabled
 
Join Date: Sep 2002
Default Car Amp

I am not that electronics literate so bear with me please, but I see all the schematics have usually two parts, the power supply and the actual audio circuit, with the audio ciorcuit marked where the power input goes. So if I was to attain/create a power supply circuit that worked with a 12volt car battery that could feed the voltage and curent required by that amp I could use that same amplifier circuity for a car amp correct?

If so, how hard would it be to feed an amplifier designed for home audio? I will rule out Class A due to their huge power consumption, but say for Class A/B, D etc
  Reply With Quote
Old 30th September 2002, 05:01 AM   #2
diyAudio Member
 
Join Date: Nov 2001
Location: Harlowton, MT, USA
It is easy to run any amplifier circuit from a car amp supply of proper voltage/current, but it is very difficult to build a car amp switchmode power supply (to step up from 12V to, say, +/- 42V). Maybe you can get a PSU from an old car amp or something, or be bold and try to build one.
__________________
- "With power amplifiers, negative feedback is a good thing, and positive feedback can induce destructive oscillation, but with people, positive feedback is a good thing, and negative feedback can induce destructive oscillation"
  Reply With Quote
Old 30th September 2002, 05:15 AM   #3
Account Disabled
 
Join Date: Sep 2002
Well ultimately I will like to build one (PSU). I am building my electrostatic speakers at the moment so for now this idea is just in research for me, but I have always longed to build my own car stereo equipment. Finding schematics seems to be hard though, I found one guy who made some 1500W subwoofer amp, and that looked damn impressive, just no schematics for that amp (not that I could find anyway).

I can see it right now, a nice tube amp glowing. Beats the hell out of neons and all those other tacky car mods of today (the plastic look seems to be in).

Thanks however, the whole idea seems a lot more feasible now, the lack of online schematics made it seem impossible.

-Mike
  Reply With Quote
Old 30th September 2002, 05:18 AM   #4
diyAudio Member
 
Join Date: Nov 2001
Location: Harlowton, MT, USA
Rod Elliot's site has a schematic for a 300V car PSU. It's not a very complete project though. I am considering it anyway.
__________________
- "With power amplifiers, negative feedback is a good thing, and positive feedback can induce destructive oscillation, but with people, positive feedback is a good thing, and negative feedback can induce destructive oscillation"
  Reply With Quote
Old 30th September 2002, 05:20 AM   #5
Account Disabled
 
Join Date: Sep 2002
http://www.sound.westhost.com/project89.htm
This one is 35v and is written by him and some other dude. Is this the one you meant or is there another which is actually 300V?
  Reply With Quote
Old 30th September 2002, 05:35 AM   #6
diyAudio Member
 
Join Date: Nov 2001
Location: Harlowton, MT, USA
Excuse me, when I said 300V, I meant 300W. It is my most common typo, and should always be watched for. But you can get 300V from it if you use a different transformer.
__________________
- "With power amplifiers, negative feedback is a good thing, and positive feedback can induce destructive oscillation, but with people, positive feedback is a good thing, and negative feedback can induce destructive oscillation"
  Reply With Quote
Old 30th September 2002, 05:39 AM   #7
Account Disabled
 
Join Date: Sep 2002
It's all good Typo's are my speciality too.

Also regarding the 300Volts, that would be reduce current though I assume?
The same way step up transformers on electrostatics increase voltage by 6 times whereas the current becomes 1/6th of what it was?
  Reply With Quote
Old 30th September 2002, 05:49 AM   #8
diyAudio Member
 
Join Date: Nov 2001
Location: Harlowton, MT, USA
Of course it would be at reduced current, but that is what tube amps use. You would just use a transformer with a 1ct:25 ratio instead of the recommended 1ct:6ct. You would have to wind your own on a ferrite EI core, I expect, I don't know how else you'd get a 300V sec. 5kHz tranformer.
__________________
- "With power amplifiers, negative feedback is a good thing, and positive feedback can induce destructive oscillation, but with people, positive feedback is a good thing, and negative feedback can induce destructive oscillation"
  Reply With Quote
Old 30th September 2002, 05:55 AM   #9
Account Disabled
 
Join Date: Sep 2002
Hehe, yeah I am reading through Rod's article now, it seems to be a large task ahead of me if i decide to go through with this.

Have you yourself built any car audio equipment?
  Reply With Quote
Old 30th September 2002, 05:57 AM   #10
diyAudio Member
 
Join Date: Nov 2001
Location: Harlowton, MT, USA
Only subwoofer boxes to sell, I have done lots of that, but I have never built a SMPS. I have built some home amps though.
__________________
- "With power amplifiers, negative feedback is a good thing, and positive feedback can induce destructive oscillation, but with people, positive feedback is a good thing, and negative feedback can induce destructive oscillation"
  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



New To Site? Need Help?

All times are GMT. The time now is 06:29 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