pre amplifier build project

FOXYE · 29th September 2009, 10:56 PM

Looking for good pre amplifier build project.

That will work with 2X18V 2000mAH transformer.

Any advice on schematics will greatly appreciated.

Tolu · 1st October 2009, 12:24 PM

Very good! Also try LM4562/LME49720 insted of OPA2134!

http://sound.westhost.com/project88.htm

AndrewT · 12:43 PM

Quote:

Originally Posted by FOXYE

work with 2X18V 2000mAH transformer.

I think you mean 2A not 2AH.
That gives you an ~70VA transformer.

Ensure that the maximum continuous DC current is kept below 500mA.

The DCB1 would be suitable.
This combined with switching is almost at the Group Buy stage.
search mesmerize & hypnotize
Also look at LED/LDR attenuators.
Check out buffers and headphone amplifiers and low gain low current amplifiers.

rjm · 2nd October 2009, 04:04 AM

Recently I've browsed the schematics on the following site for circuit ideas. It's always nice to see what the pros do before coming up with your own design...

http://www.abeltronics.co.uk/diagrams.php?z=classe

29th September 2009, 10:56 PM	#1
FOXYE diyAudio Member Join Date: Feb 2009	pre amplifier build project Looking for good pre amplifier build project. That will work with 2X18V 2000mAH transformer. Any advice on schematics will greatly appreciated.

2nd October 2009, 04:04 AM	#4
rjm Richard Murdey diyAudio Member Join Date: May 2004 Location: Kyoto Blog Entries: 32	Recently I've browsed the schematics on the following site for circuit ideas. It's always nice to see what the pros do before coming up with your own design... http://www.abeltronics.co.uk/diagrams.php?z=classe __________________ RJM Audio (phonoclone.com)

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1st October 2009, 12:24 PM	#2
Tolu diyAudio Member Join Date: Mar 2007	Very good! Also try LM4562/LME49720 insted of OPA2134! http://sound.westhost.com/project88.htm

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