Any gainclone using 60 Volts?

earlybirddisco · 30th March 2011, 01:16 PM

Hello to you all.
I have been looking to build an amp to replace the output of an old receiver and have looked at designs using 3886 etc put they all are in the +- 35volts range. Are there any similar chips using +- 60 volts. I am aware of the old STK0080 series but never found good reviews of them. Would prefer something more modern and of better sound quality but still simple like the gainclones.
Thanks.

geraldfryjr · 30th March 2011, 02:12 PM

Apex precision power from cirrus logic has power opamps all the way up to -+200v.
However the are very pricey. jer

Rainwulf · 03:00 PM

60 volt rails is an amp of a very high output power, why that voltage?

Redshift187 · 30th March 2011, 03:29 PM

Quote:

Originally Posted by Rainwulf

60 volt rails is an amp of a very high output power, why that voltage?

Because that's the transformer in the receiver he wants to modify.

Rainwulf · 30th March 2011, 11:32 PM

Oh of course, my bad, i didnt read the question properly.

tomchr · 30th March 2011, 11:38 PM

I rebuilt a Parasound A23 using an LME49811 driver and an STD03N/STD03P output stage. The A23 main board was fried, but the +/-56~60 V supply was still good. So I reused the supply and built my own amp board.

See thread here: Yet Another LME49811 + STD03 Build

Not quite as simple as the LM3886, but better performance and not that much more complexity.

~Tom

earlybirddisco · 31st March 2011, 12:26 AM

Thanks for your response as was stated the amp has a +- 60 volts supply and also the space is limited . So I need something compact and price is also an issue.
Thanks. I will check out the LM4702 designs.

tomchr · 31st March 2011, 01:20 AM

I forget the exact size of my LME49811 board. 6x10 cm or so. Fairly compact. Not as compact as an LM3886, but close enough. I've seen people (panson_hk in particular) build modules that would fit on the back of a heat sink. That may be an option for you.

~Tom

Redshift187 · 31st March 2011, 02:23 PM

You could use almost any chip amp in a single supply with one 60V rail. For example, the absolute max for the LM3886 is 84V, regardless of whether it's dual supply or single supply.

geraldfryjr · 10:32 PM

A bridged LM3886 would be good with a 60volt supply.
Or better yet a BPA-200 using four LM3886's or two LM4780's.
You could use one amplifier circuit per rail. jer

P.S. A BPA-100 would probably be a better choice depending on the VA rating of your transformer.

30th March 2011, 01:16 PM	#1
earlybirddisco diyAudio Member Join Date: Jun 2006	Any gainclone using 60 Volts? Hello to you all. I have been looking to build an amp to replace the output of an old receiver and have looked at designs using 3886 etc put they all are in the +- 35volts range. Are there any similar chips using +- 60 volts. I am aware of the old STK0080 series but never found good reviews of them. Would prefer something more modern and of better sound quality but still simple like the gainclones. Thanks.

30th March 2011, 02:58 PM	#3
Rainwulf diyAudio Member Join Date: Feb 2009	60 volt rails is an amp of a very high output power, why that voltage? Last edited by Rainwulf; 30th March 2011 at 03:00 PM.

31st March 2011, 02:23 PM	#9
Redshift187 diyAudio Member Join Date: Aug 2008	You could use almost any chip amp in a single supply with one 60V rail. For example, the absolute max for the LM3886 is 84V, regardless of whether it's dual supply or single supply. __________________ Tyler

31st March 2011, 10:11 PM	#10
geraldfryjr diyAudio Member Join Date: Feb 2008 Location: Jackson,michigan	A bridged LM3886 would be good with a 60volt supply. Or better yet a BPA-200 using four LM3886's or two LM4780's. You could use one amplifier circuit per rail. jer P.S. A BPA-100 would probably be a better choice depending on the VA rating of your transformer. Last edited by geraldfryjr; 31st March 2011 at 10:32 PM.

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30th March 2011, 02:12 PM	#2
geraldfryjr diyAudio Member Join Date: Feb 2008 Location: Jackson,michigan	Apex precision power from cirrus logic has power opamps all the way up to -+200v. However the are very pricey. jer

30th March 2011, 11:32 PM	#5
Rainwulf diyAudio Member Join Date: Feb 2009	Oh of course, my bad, i didnt read the question properly.

30th March 2011, 11:38 PM	#6
tomchr diyAudio Member Join Date: Feb 2009 Location: Greater Seattle Area	I rebuilt a Parasound A23 using an LME49811 driver and an STD03N/STD03P output stage. The A23 main board was fried, but the +/-56~60 V supply was still good. So I reused the supply and built my own amp board. See thread here: Yet Another LME49811 + STD03 Build Not quite as simple as the LM3886, but better performance and not that much more complexity. ~Tom

31st March 2011, 12:26 AM	#7
earlybirddisco diyAudio Member Join Date: Jun 2006	Thanks for your response as was stated the amp has a +- 60 volts supply and also the space is limited . So I need something compact and price is also an issue. Thanks. I will check out the LM4702 designs.

31st March 2011, 01:20 AM	#8
tomchr diyAudio Member Join Date: Feb 2009 Location: Greater Seattle Area	I forget the exact size of my LME49811 board. 6x10 cm or so. Fairly compact. Not as compact as an LM3886, but close enough. I've seen people (panson_hk in particular) build modules that would fit on the back of a heat sink. That may be an option for you. ~Tom

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