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Old 1st January 2005, 04:52 AM   #1
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Default 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
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Old 1st January 2005, 06:17 AM   #2
qwad is offline qwad  Australia
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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
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Old 11th January 2005, 08:20 PM   #3
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Hipcheck

Can you post the schematics for your amp?
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Old 13th January 2005, 08:43 PM   #4
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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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