Go Back   Home > Forums > Live Sound > Instruments and Amps

Instruments and Amps Everything that makes music, Especially including instrument amps.

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 26th June 2009, 11:23 PM   #1
kostaz8 is offline kostaz8  Greece
diyAudio Member
 
Join Date: Jun 2009
Default looking for a diy guitar amp.

I am looking for a guitar amp that i can make my own i have found a schematic but i don't know if it's good to make.Can you post any good schematics and give me any advise?Here is the the amp... http://www.high-voltage-lab.com/27/60w-guitar-amplifier
  Reply With Quote
Old 26th June 2009, 11:55 PM   #2
Banned
 
Join Date: Jan 2008
Blog Entries: 2
Look at http://sound.westhost.com/

You will find some designs there that have been built by many people.

The design you are looking at may well work OK, but unless someone here has built one it's hard to know for sure.

...or you can get this much power from a chip amp with a lot less trouble.

Google LM 3886, read the datasheet.

w
  Reply With Quote
Old 27th June 2009, 01:44 PM   #3
Bigun is offline Bigun  Canada
diyAudio Member
 
Bigun's Avatar
 
Join Date: Jan 2009
Blog Entries: 2
It looks to me as if the circuit you posted will work OK. But half the fun is building it and trying it out, most of the parts are cheap enough that you can always 'upgrade' your design if not satisfied.

I like the idea of breaking it up into three sections, pre-amp, power-amp and power supply. You can test each one.

Whatever amp you build, if you know the power level you are looking for (e.g. 60W) then start by making a good power supply. You likely won't have to make any changes to it and it would work with different amplifier options. The link you were given above to ESP is a good place to start looking for a power supply design.

Then you can add the power amplifer. You could select from many options on this Forum such as DX amplifier if you want to build out of discrete components, but the suggestion of a chip-amp is also very good as it is a simple approach.

Then focus your fun on the pre-amp part, the most interesting part for different sounds.

Edit: if the distortions/effects really gets you interesting in doing more:
http://www.montagar.com/~patj/gindex.htm

Good luck.
__________________
"The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.
  Reply With Quote
Old 28th June 2009, 11:31 PM   #4
kostaz8 is offline kostaz8  Greece
diyAudio Member
 
Join Date: Jun 2009
Does this http://sound.westhost.com/project27.htm amp have distortion or if it doesn't how can i add one?
  Reply With Quote
Old 29th June 2009, 02:02 AM   #5
diyAudio Member
 
nigelwright7557's Avatar
 
Join Date: Apr 2008
Location: Carlisle, England
You can buy ready made amplifier modules at many places.

If you buy it ready made then you know it has been built, tested and aligned professionally.

Even ebay has a wide range of amp modules from MOSFET to valve to hybrids.

Having said that you can get great satisfaction from building your from scratch. The problems start when it doesnt work because you made a mistake or you have a built one that doesnt work anyway !

I design and build my own but I have 30+ years experience.
I thoroughly test mine out on prototype board long before I go anywhere near a PCB.
__________________
http://www.murtonpikesystems.co.uk PCBCAD50 pcb design software.
  Reply With Quote
Old 29th June 2009, 09:37 AM   #6
Banned
 
Join Date: Jan 2008
Blog Entries: 2
Quote:
Originally posted by kostaz8
Does this http://sound.westhost.com/project27.htm amp have distortion or if it doesn't how can i add one?
Yes it does. The back-to-back diodes D1,D2,D3,D4 in the preamp provide 'clipping' distortion. Not everybody likes this, but you can run the amp 'clean' and use an external stompbox.

w
  Reply With Quote
Old 29th June 2009, 10:40 AM   #7
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Guitars needs a very heavy duty amplifier


they will play sustaining tones and distortions...this sucks a lot from the supply that must be huge... also huge heatsinks to the power amplifier and several output pairs... double or tripple them.

All amplifiers can do the job, you will need to increase (at least double) the output transistor quantity, double the heatsink size, double the transformer power, double the condensers and double the rectifier.

Also install big heatsinks to the drivers and be happy!

Also do not bother with distortions of other specifications...as you will use it distorting..if the amplifier produces some by itself will give you some nice colouration that may result you building a champion amplifier and your friends will try to have one alike yours.

Music reproduction (not heavy metal or heavy rock..a special style of music) is average.... guitar will sustain clipping for long, long time...normal amplifiers, from the box..will burn!

Build a Dx Amplifier... increase the things i told and you will have a nice powerfull amplifier, perfect for guitars and will survive your childrens and may be playing while your granchildrens grown up.

Maybe Rodd Elliot (ESP pages) have something good..but i have not tested... i cannot say yes or no....mine is guaranteed... and a DIY for free stuff..tested by by noisy daugther that plays guitar plugged into a Dx Amplifier, the standard one.

If you're knew into the forum...here you have the Dx Amplifier...made to be reliable even when monsters use it... (guaranteed for music as standard)... tested together guitar too, and survived without any modification...but they are needed for long time shows.

http://users.tpg.com.au/users/gerskine/dxamp/
__________________
Dx Blame ST with a tube preamp. recorded with Xperia cell phone, https://www.youtube.com/watch?v=Qjs32J0gdj0; https://www.youtube.com/watch?v=nhrZ...vDnDhEpNv_XVxg
  Reply With Quote
Old 29th June 2009, 06:29 PM   #8
kostaz8 is offline kostaz8  Greece
diyAudio Member
 
Join Date: Jun 2009
All of you told me about some great sites to look for.But what amp of all these do you suggest to build?
  Reply With Quote
Old 30th June 2009, 07:48 AM   #9
teemuk is offline teemuk  Finland
diyAudio Member
 
Join Date: Nov 2004
Location: Suomi, Finland
If you are going to go onward from a schematic only, I suggest you take a look at the commercial designs instead. The Internet is full of such schematics.

Make a small list of amps you like and take a look at their circuitry to see what does what. You will have a much better understanding of what kind of an amp/circuit you need.


Edit: I have built the 60W guitar amp in question. In short: Stay away from it. Old-fashioned design that sounds terrible and doesn't work right without tweaking.

Rod Elliot's power amp is a somewhat good design but the preamp is not worth a dime unless you want to play with pristine clean sounds only - which turn into obnoxious buzz when the preamp gets overdriven.

To this day I haven't found DIY examples of solid-state guitar amps that could rival most of the commercial designs. Prepare to build some mighty complex stuff if you want the amp to sound good.
  Reply With Quote
Old 30th June 2009, 01:35 PM   #10
diyAudio Member
 
Join Date: Apr 2008
Yes... Yes... More...
I promise not to say anything...
  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
4x12 Guitar cab using guitar and bass speakers help andrewskaterrr Instruments and Amps 15 23rd April 2009 11:43 PM
JLH Guitar Amp lcsegeng Solid State 1 14th March 2007 07:12 AM
DIY guitar BassAwdyO Instruments and Amps 41 8th January 2006 06:32 PM
Guitar to DIY amp? silentblackhat Instruments and Amps 2 27th July 2004 06:36 PM
6V6 Guitar Amp SHiFTY Tubes / Valves 2 5th August 2003 02:10 PM


New To Site? Need Help?

All times are GMT. The time now is 03:22 AM.


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