I need more volts in my car. - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies

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 19th September 2005, 07:26 PM   #1
Dan2 is offline Dan2  South Africa
diyAudio Member
 
Join Date: Sep 2005
Default I need more volts in my car.

Hi guys.
i am very new to this site site - and i'm a complete amateur at electronics - most of the stuff i know i have learn't by myself!!

Anyway, here's my problem - i have a house amp in my room that im not using and i want to use it in my car. it uses a single 50v transformer. can anyone help me to build somthing to get the 50v i need from a 12v car battery??
  Reply With Quote
Old 19th September 2005, 07:28 PM   #2
Magura is offline Magura  Denmark
diyAudio Member
 
Magura's Avatar
 
Join Date: Oct 2003
Location: Denmark, Viborg
3 extra batteries

Magura
__________________
Everything is possible....to do the impossible just takes a little while longer.
www.class-a-labs.com
  Reply With Quote
Old 19th September 2005, 09:11 PM   #3
Eva is offline Eva  Spain
diyAudio Member
 
Eva's Avatar
 
Join Date: Oct 2003
Location: Near the sea
Send a message via MSN to Eva
You can scale up those 12V from the car with a relatively simple SMPS. That topic has been already discussed several times, and several people have built their own PSUs. There are a lot of posts with explanations, just use the search engine.
  Reply With Quote
Old 23rd September 2005, 04:48 PM   #4
diyAudio Member
 
Join Date: Sep 2005
Send a message via ICQ to sndscientist Send a message via AIM to sndscientist Send a message via MSN to sndscientist Send a message via Yahoo to sndscientist
you have alot of different options, alot of it depends on your financial situation.

for example you can buy a 750 watt vector power inverter (only said a brand name cause they seem to be the most durable with inductive loads) for about $100 <usd>. however if the amplifier in question requires a sine wave such as the qsc powerlight series and the older model carvers, then simple inverters and smps may pose a problem.

depending on the vehicle in question a modification to the alternator may be an option. in my 85 ford E150 the voltage regulator and alternator were modified to produce between 90 and 110 vac 3 phase. that is an option but with that you need a high current recitfier and shunt regulator to limit the voltage to the charging system of the car.


if you choose to attempt to build something yourself and you amplifier doesn't require a sine wave and isn't really frequency dependant. such as if the transformer just dumps into a bridge recitfier and a few giant storage caps, your possabilities are almost endless.

just out of curiosity what are the rail voltages of the output section? does the rest of the amp just reduce the rail voltages to other usable levels or are there more windings and other taps on the transformer?

Adrian
  Reply With Quote
Old 23rd September 2005, 09:35 PM   #5
Dan2 is offline Dan2  South Africa
diyAudio Member
 
Join Date: Sep 2005
Well. like i said i'm an ameteur, so i'd rather not mess around with the altenater. the amp i want to use is pretty old (actually REALLY old). It just has a 50v dc input, bass, treble, volume control and the speaker output. there used to be two amps connected to the one transformer, but the one blew so im just using the remaining one. i want to use this amp cos it would be really easy to install if i just sort out the power supply.
  Reply With Quote
Old 24th September 2005, 08:05 AM   #6
diyAudio Member
 
Join Date: Apr 2005
Location: Tallinn
Quote:
Originally posted by Dan2
Well. like i said i'm an ameteur, so i'd rather not mess around with the altenater.
That is a little bit contradictory, if you ask me.
You said, that you had a mains-transformer for the amp. Just buy a suitable alternator and connect it with the transformer. It's many times simpler, than building a smps of your own.
  Reply With Quote
Old 25th September 2005, 04:09 PM   #7
diyAudio Member
 
Join Date: Sep 2005
Send a message via ICQ to sndscientist Send a message via AIM to sndscientist Send a message via MSN to sndscientist Send a message via Yahoo to sndscientist
IMO, building a smps, while being a better learning experience, would prove much harder than doing a simple alternator modification or adding a power inverter. however for todays newer and more complicated vehicles i suppose alternator modifications are pretty difficult.
  Reply With Quote
Old 25th September 2005, 04:23 PM   #8
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
I don't suppose you'd consider buying a car amp (with two working channels)? It might be less expensive at the end of the day.

-Chris
  Reply With Quote
Old 26th September 2005, 08:52 PM   #9
Dan2 is offline Dan2  South Africa
diyAudio Member
 
Join Date: Sep 2005
Well i have a few car amps, but they only push out 17 watts per channel, and they're not brigable. If i could bridge them, there might just be enough power - so can i build a bridge circuit quite easily or not??

I'm not interested in buying a power inverter cause it costs about the same as a car amp!!!

Thanks guys
  Reply With Quote
Old 26th September 2005, 09:05 PM   #10
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Do your car amps have a transformer inside them? If they are small with chips against the heatsink, they may already be bridged. Both speaker leads would have signal, and may be 6~7 VDC above ground.
-Chris
  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
dc volts mike dodd Chip Amps 13 10th August 2009 03:45 AM
12 volts to 6 Dan2 Car Audio 36 23rd November 2007 06:35 AM
power transformers 220 volts to 110 volts garydmd Chip Amps 3 7th April 2007 02:52 PM
TOO many volts ????!!!! cbutterworth Tubes / Valves 6 16th December 2006 10:50 PM
Gainclone is on 120 volts will it be fine at 220 volts? Jimmy154 Chip Amps 7 29th June 2005 12:10 AM


New To Site? Need Help?

All times are GMT. The time now is 09:19 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