Which audio buffer design is the best for Gainclone?

gengcard · 12th August 2004, 05:20 AM

I got many sample ICs from TI, OPA604, OPA627, OPA637, BUF634P, NE5532 and OPA2134. Now I'm planning to do some audio buffer for my Gainclone both NIGC and IGC. I have searched in this website to find out some schematics and got a Carlos's design for the web. I have made the PCB for testing and will be got it on this Saturday. Could the members in this website advise me which design is the best for Gainclone?

Nuuk · 12th August 2004, 08:00 AM

I'm not sure if you mean which opamp circuit is best, or which opamp.

If you use the circuit you got from Carlos, you will have a good one. If you use sockets for the opamps, you can decide which opamp you like best.

planet10 · 12th August 2004, 08:26 AM

no 6922, ECC99, or 6H30pi in that list ...

dave

carlosfm · 12th August 2004, 09:15 AM

Quote:

Originally posted by planet10
no 6922, ECC99, or 6H30pi in that list ...

dave

Gencard, the OPA627 is the best one from your list.

And until today, from my op-amp list too.

gengcard · 12th August 2004, 09:18 AM

For me, I think tube price is expensive than opamp and in currently, a few tube manufactories are still producing and very a good tube is so expensive too. By another way, Opamp is so easy to find and not too expensive. However, I have a plan to make a audio buffer by 6922 as soon as possible.

.... after I have finished the audio buffer by opamp.

matjans · 12th August 2004, 10:53 AM

627's are pretty expensive (but not for carlosfm, he has a machine that spits'em out i remember

)

peranders · 12th August 2004, 11:06 AM

If you already have the opamps, the OPA627 is the best no doubt plus maybe with an BUF634, especially in you have an inverting gainclone with a rather low value of the input resistor.

If the price matters, OPA134, 2134 is probably the best in your list. If you can chose freely you have tons of good opamps!

I myself have chosen AD8620 but it comes only in surface mounted package.

More info here.

carlosfm · 12th August 2004, 11:31 AM

Quote:

Originally posted by matjans
627's are pretty expensive (but not for carlosfm, he has a machine that spits'em out i remember )

There's also a tree with that fruit.

Quote:

Originally posted by peranders
If the price matters, OPA134, 2134 is probably the best in your list.

Yes it is.

KT · 12th August 2004, 01:44 PM

What's the cheapest price for the OPA627, BTW?

Thanks,
KT

peranders · 12th August 2004, 02:37 PM

TI suggests 12 USD as 1000 price for the cheapest version.

The price in Sweden for 1-9 pcs. is around 40 USD

12th August 2004, 05:20 AM	#1
gengcard diyAudio Member Join Date: Jun 2004 Location: Bangkok	Which audio buffer design is the best for Gainclone? I got many sample ICs from TI, OPA604, OPA627, OPA637, BUF634P, NE5532 and OPA2134. Now I'm planning to do some audio buffer for my Gainclone both NIGC and IGC. I have searched in this website to find out some schematics and got a Carlos's design for the web. I have made the PCB for testing and will be got it on this Saturday. Could the members in this website advise me which design is the best for Gainclone?

12th August 2004, 08:00 AM	#2
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	I'm not sure if you mean which opamp circuit is best, or which opamp. If you use the circuit you got from Carlos, you will have a good one. If you use sockets for the opamps, you can decide which opamp you like best. __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

12th August 2004, 08:26 AM	#3
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	no 6922, ECC99, or 6H30pi in that list ... dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

12th August 2004, 11:06 AM	#7
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	If you already have the opamps, the OPA627 is the best no doubt plus maybe with an BUF634, especially in you have an inverting gainclone with a rather low value of the input resistor. If the price matters, OPA134, 2134 is probably the best in your list. If you can chose freely you have tons of good opamps! I myself have chosen AD8620 but it comes only in surface mounted package. More info here. __________________ /Per-Anders (my first name) or P-A as my friends call me

12th August 2004, 02:37 PM	#10
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	TI suggests 12 USD as 1000 price for the cheapest version. The price in Sweden for 1-9 pcs. is around 40 USD __________________ /Per-Anders (my first name) or P-A as my friends call me


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12th August 2004, 09:18 AM	#5
gengcard diyAudio Member Join Date: Jun 2004 Location: Bangkok	For me, I think tube price is expensive than opamp and in currently, a few tube manufactories are still producing and very a good tube is so expensive too. By another way, Opamp is so easy to find and not too expensive. However, I have a plan to make a audio buffer by 6922 as soon as possible. .... after I have finished the audio buffer by opamp.

12th August 2004, 10:53 AM	#6
matjans diyAudio Member Join Date: Aug 2003 Location: Utrecht, NL	627's are pretty expensive (but not for carlosfm, he has a machine that spits'em out i remember )

12th August 2004, 01:44 PM	#9
KT diyAudio Member Join Date: Oct 2003 Location: USA	What's the cheapest price for the OPA627, BTW? Thanks, KT

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