Typical guitar output? - Page 3 - diyAudio
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 11th June 2006, 05:26 PM   #21
wxn is offline wxn  Lithuania
diyAudio Member
 
wxn's Avatar
 
Join Date: Sep 2003
Location: Vilnius
My bass guitar puts out over 2V peaks easily with volume knob turned up and some finger picking. But playing softly keeps the singnal in the hudreds of mV range. But a guitar played heavily, expecially chords, should be capable of output over 1V too.
My 2cents
__________________
Nothing is as simple as it seems
  Reply With Quote
Old 11th June 2006, 06:09 PM   #22
DoctorJ is offline DoctorJ  United States
diyAudio Member
 
Join Date: Mar 2006
Location: Georgia
Many guitar amps employ two diodes to the +/- rails at the input stage before the first opamp. Thus any voltage peak higher than 1.4 volts will be dumped into the supply.
  Reply With Quote
Old 11th June 2006, 10:06 PM   #23
teemuk is offline teemuk  Finland
diyAudio Member
 
Join Date: Nov 2004
Location: Suomi, Finland
No. In this case it's amplitudes exceeding supply voltage + diode's forward voltage.
  Reply With Quote
Old 14th June 2006, 12:45 PM   #24
Wynand is offline Wynand  South Africa
diyAudio Member
 
Wynand's Avatar
 
Join Date: Mar 2005
Location: Cape Town
Ok. So I've got my guitar at work... can I just put the guitar on a scope (to see output) or must it be connecter to a amp?

Will a normal audio amp work aswell, I don't have my guitaramp at work
  Reply With Quote
Old 14th June 2006, 01:24 PM   #25
diyAudio Member
 
Join Date: Jul 2005
Location: North Derbyshire
Quote:
Originally posted by Wynand
Ok. So I've got my guitar at work... can I just put the guitar on a scope (to see output) or must it be connecter to a amp?
Yes, just connect the guitar direct to the scope, the 1Meg input impedance of the scope is perfect for a passive guitar!.
__________________
Nigel Goodwin
  Reply With Quote
Old 14th June 2006, 01:57 PM   #26
Wynand is offline Wynand  South Africa
diyAudio Member
 
Wynand's Avatar
 
Join Date: Mar 2005
Location: Cape Town
Thanks. Tried it.

Built a non-inverting stage with a LM358 with gain 10x.

Plugged this into my LM4780 stereo amplifier.........

Voila.... sound, not brilliant, not good, but there!!!

There is a soft fuzz effect behind the sound of the guitar, but i suspect that it is the prototyping board I'm using!?
  Reply With Quote
Old 14th June 2006, 07:32 PM   #27
diyAudio Member
 
Join Date: Jul 2005
Location: North Derbyshire
Quote:
Originally posted by Wynand
Thanks. Tried it.

Built a non-inverting stage with a LM358 with gain 10x.

Plugged this into my LM4780 stereo amplifier.........

Voila.... sound, not brilliant, not good, but there!!!

There is a soft fuzz effect behind the sound of the guitar, but i suspect that it is the prototyping board I'm using!?
What input impedance is the preamp?.
__________________
Nigel Goodwin
  Reply With Quote
Old 15th June 2006, 08:05 AM   #28
Wynand is offline Wynand  South Africa
diyAudio Member
 
Wynand's Avatar
 
Join Date: Mar 2005
Location: Cape Town
1Meg

It's a VERY basic circuit. Input to GND = 1M

Gain is with a 10K and a 1K resistor. Nothing else

P.S. Just grabbed a LM358. I figured, its a guitar amp, not a Hi-fi.

I wasn't looking for performance, yet. I want to play around with the circuit first so if I blow something its not a biggie!
  Reply With Quote
Old 18th June 2006, 02:46 PM   #29
diyAudio Member
 
Join Date: Oct 2004
Send a message via AIM to rx7speed
just curious here what is the output of the emg-80? my dvm took a dump and I don't have a scope
  Reply With Quote
Old 19th June 2006, 09:18 PM   #30
diyAudio Member
 
Join Date: Apr 2006
Location: Utica
Don't know about EMG 80, but the EMG 81's output is 1,5V according to manufacturer's specs.
  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
Ground loops & whine on my guitar's output signal! HankMcSpank Solid State 1 13th August 2008 09:47 PM
Connecting headphones to guitar amp speaker output mike6182 Instruments and Amps 6 21st November 2007 11:20 AM
Typical 2A3 hum? bobhayes Tubes / Valves 31 17th October 2005 02:12 PM
Just your typical DIY enclosure.. ScottG Multi-Way 2 10th July 2005 11:44 PM
cheapest output transformer for a SE EL84 guitar tschrama Tubes / Valves 12 23rd December 2003 11:15 PM


New To Site? Need Help?

All times are GMT. The time now is 09:07 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