Instrument/Microphone Tube Pre-amp

StalfoS · 31st August 2005, 06:46 PM

I am interested in building a tube preamp to connect to my computer's sound card for recording guitar and/or vocals. Here are my requirements:

-low noise
-2 chanel
-good clean tone
-it is not necessary to have ultra low distortion. Very small amounts of harmonic distortion (2nd order?) are acceptable.

Additional stuff that would be cool, but could be ommitted for the sake of simplicity:
-Limiter/Compressor
-Level meter/clipping indicator

I am wondering if anyone here could suggest a project or schematic, that is available on the internet (or at a bookstore). A detailed explantiaon of how to build would be ideal, but I could probably work from just a schematic if it is relativly straight forward.

Cheers.

moamps · 31st August 2005, 07:50 PM

http://www.gyraf.dk/

DIY-projects

G9 Tube Microphone preamplifier

G1176 compressor

Very good site.

thyratron · 31st August 2005, 10:58 PM

Hi StalfoS,
May I suggest this;

http://geek.scorpiorising.ca/MicPreamp.html

from a fellow Canadian.

paul

jerishi · 1st September 2005, 04:01 AM

The june 2003 issue of 'audio express' magazine had a great (and fairly simple) article/schematic for a tube pre-amp written by graham dicker that might be what you're looking for. It doubles as a voice/ instrument pre. I'm not sure how you might access that article. Good luck w/project!

StalfoS · 2nd September 2005, 07:15 PM

Well I have to say that the gyraf projects look really cool... the project description is very detailed too. I am not all that comfortable etching my own pcbs, however. I dont suppose anyone is selling them? I am a little dissuaded by the warnings on the G9 suggesting that it is a very advanced project.

thyratron- looks like that could me another viable option.. possibly a little more striaghtforward. How well does it preform? Know any who has built it?

moamps · 2nd September 2005, 09:39 PM

Quote:

Originally posted by StalfoS
....I am not all that comfortable etching my own pcbs, however. I dont suppose anyone is selling them? I am a little dissuaded by the warnings on the G9 suggesting that it is a very advanced project.
..

Take a look in another forum:

http://www.prodigy-pro.com/forum/vie...er=asc&start=0

Regards,
Milan

thyratron · 3rd September 2005, 07:49 AM

StalfoS,
I've no doubt Geek will jump in with info.
I intend to build it for use with electro-acoustic guitar.
It certainly wont be too expensive to breadboard.
regards paul.

31st August 2005, 06:46 PM	#1
StalfoS diyAudio Member Join Date: Jan 2005 Location: Vancouver, British Columbia	Instrument/Microphone Tube Pre-amp I am interested in building a tube preamp to connect to my computer's sound card for recording guitar and/or vocals. Here are my requirements: -low noise -2 chanel -good clean tone -it is not necessary to have ultra low distortion. Very small amounts of harmonic distortion (2nd order?) are acceptable. Additional stuff that would be cool, but could be ommitted for the sake of simplicity: -Limiter/Compressor -Level meter/clipping indicator I am wondering if anyone here could suggest a project or schematic, that is available on the internet (or at a bookstore). A detailed explantiaon of how to build would be ideal, but I could probably work from just a schematic if it is relativly straight forward. Cheers.

1st September 2005, 04:01 AM	#4
jerishi diyAudio Member Join Date: Jan 2005 Location: wa. state	comp soundcard pre-amp The june 2003 issue of 'audio express' magazine had a great (and fairly simple) article/schematic for a tube pre-amp written by graham dicker that might be what you're looking for. It doubles as a voice/ instrument pre. I'm not sure how you might access that article. Good luck w/project!

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31st August 2005, 07:50 PM	#2
moamps diyAudio Member Join Date: Oct 2002 Location: Croatia	http://www.gyraf.dk/ DIY-projects G9 Tube Microphone preamplifier G1176 compressor Very good site.

31st August 2005, 10:58 PM	#3
thyratron diyAudio Member Join Date: May 2005 Location: yorkshire.	Hi StalfoS, May I suggest this; http://geek.scorpiorising.ca/MicPreamp.html from a fellow Canadian. paul

2nd September 2005, 07:15 PM	#5
StalfoS diyAudio Member Join Date: Jan 2005 Location: Vancouver, British Columbia	Well I have to say that the gyraf projects look really cool... the project description is very detailed too. I am not all that comfortable etching my own pcbs, however. I dont suppose anyone is selling them? I am a little dissuaded by the warnings on the G9 suggesting that it is a very advanced project. thyratron- looks like that could me another viable option.. possibly a little more striaghtforward. How well does it preform? Know any who has built it?

3rd September 2005, 07:49 AM	#7
thyratron diyAudio Member Join Date: May 2005 Location: yorkshire.	StalfoS, I've no doubt Geek will jump in with info. I intend to build it for use with electro-acoustic guitar. It certainly wont be too expensive to breadboard. regards paul.

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