p2p opa549 gainclone

HIPCHECK · 1st January 2005, 05:52 AM

finally got around to this gainclone thingy........and honestly i can say they are worth all the hype. to easy not to build one for fun.

i made a simple p2p opa549 based amp, on strip board.
2 xicon 1000uf caps (from PE)
1 22k carbon resistor from rat shack pin 1-3
1 47k metal film rat shack pin 4 to gnd
1 1k metal film rat shack pin 3 gnd
5 TI samples (opa549)
2 18v makita ni-cad drill batts *puts out 20volts at chip
(i have 4 extra from burning out drills at work)

i have no bypass caps on the batts, or the 1000uf at chips.
no zobel, buffer, etc. and also held together and hooked up with a rats nest of alligator clips, lol.....i ran these all day while working and my co-workers just couldnt get that the amps sounded so good and i built them out of cheapo parts.

the speakers i pieced together didnt help any, but the gainclone still made them sound good. i really didnt hear any bad sounds, hums, buzz, etc

i am going to make a website up and post the pics, but im moving all weekend and my girl is giving birth in 2 weeks, so if i find time to do anything ill be lucky!

also the case work is nice, and just as minimal as the amps parts. total for the project is well under $20.00

qwad · 1st January 2005, 07:17 AM

congrats allow me to be the first to congratulate you on the success of your gainclone and the impending birth of your 1st born. and btw I dont evy you moving house having just don the same myself oh what a nightmare luckily I have a fit and strong 18 yr old son and his chums who chipped in and helped with the move... whilst I am still planning to do my first chip amp amongst other projects[ ie: some speakers and a jlh class a amp or a hiraga 20 watter, if I can make up my mind which of those 2 to do] once the dust has finally settled and a happy new year to you and your dear other half cheers

tomcat

jaudio · 11th January 2005, 09:20 PM

Hipcheck

Can you post the schematics for your amp?

demogorgon · 13th January 2005, 09:43 PM

looks like he pretty mush used the suggested design from the front of the datasheets.. just download it. just google for opa549.

1st January 2005, 05:52 AM	#1
HIPCHECK diyAudio Member Join Date: Jun 2004 Location: ARKANSAS	p2p opa549 gainclone finally got around to this gainclone thingy........and honestly i can say they are worth all the hype. to easy not to build one for fun. i made a simple p2p opa549 based amp, on strip board. 2 xicon 1000uf caps (from PE) 1 22k carbon resistor from rat shack pin 1-3 1 47k metal film rat shack pin 4 to gnd 1 1k metal film rat shack pin 3 gnd 5 TI samples (opa549) 2 18v makita ni-cad drill batts *puts out 20volts at chip (i have 4 extra from burning out drills at work) i have no bypass caps on the batts, or the 1000uf at chips. no zobel, buffer, etc. and also held together and hooked up with a rats nest of alligator clips, lol.....i ran these all day while working and my co-workers just couldnt get that the amps sounded so good and i built them out of cheapo parts. the speakers i pieced together didnt help any, but the gainclone still made them sound good. i really didnt hear any bad sounds, hums, buzz, etc i am going to make a website up and post the pics, but im moving all weekend and my girl is giving birth in 2 weeks, so if i find time to do anything ill be lucky! also the case work is nice, and just as minimal as the amps parts. total for the project is well under $20.00

1st January 2005, 07:17 AM	#2
qwad diyAudio Member Join Date: Mar 2003 Location: adelaide city of churches	congrats allow me to be the first to congratulate you on the success of your gainclone and the impending birth of your 1st born. and btw I dont evy you moving house having just don the same myself oh what a nightmare luckily I have a fit and strong 18 yr old son and his chums who chipped in and helped with the move... whilst I am still planning to do my first chip amp amongst other projects[ ie: some speakers and a jlh class a amp or a hiraga 20 watter, if I can make up my mind which of those 2 to do] once the dust has finally settled and a happy new year to you and your dear other half cheers tomcat __________________ we all have problems only some people have more than most.... long live the Magyar (Hungarians) in the world!

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11th January 2005, 09:20 PM	#3
jaudio diyAudio Member Join Date: Oct 2004	Hipcheck Can you post the schematics for your amp?

13th January 2005, 09:43 PM	#4
demogorgon diyAudio Member Join Date: Jul 2004 Location: Behind you.	looks like he pretty mush used the suggested design from the front of the datasheets.. just download it. just google for opa549.

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