high performance but cheap amp

rulezzz · 14th May 2004, 05:00 PM

I want to make power amp of 2x30w.Can you post some links for cheap but good performance amplifier,or maybe i should use chip amp?

destroyer X · 14th May 2004, 08:33 PM

This way i have what you want, a scratch... and no adress to send you.
As this amplifiers cannot be published this way.... only sending directly straigth to you.
I have the necessary good will.... but.... without adress....
Carlos

tschrama · 15th May 2004, 01:04 AM

Hi Carlos,

I'm allways interested in new circuit topologies! Could you mail me a copy?

Best regards,
Thijs

sss · 15th May 2004, 06:36 AM

Quote:

Originally posted by rulezzz
or maybe i should use chip amp?

go for it !!!

thanh · 15th May 2004, 03:01 PM

30w?
I use slone's topo.
Input stage and vas :2sc1815/2sa1015
output stage:2sb688/2sd718
2sc1815 is very cheap,OK?you can also buy 2sc2240/2sa978

rulezzz · 15th May 2004, 03:03 PM

and what do you think about lm's..?

thanh · 15th May 2004, 03:11 PM

Has anyone here built a Slone Amp or a Tigersaurus?

sam9 · 15th May 2004, 03:30 PM

I built a version of Slones 11.4 which is normally ~75-100W but with a power supply that limits it to 45-50W. No problems. You could probably scale it back to 30W but I think you might need to change a couple of resistor values -- probably at least the one that sets the tail current.

Scaled back to that power level you could probably use TIP3055 and TIP2955 for output devices with little penalty - on the plus side they have a smaller footprint, cost less and there would be little chance of getting counterfiets (not a trivial consideration, unfortunately).

On a completely different tack, 30W is well within the capabilities of several IC amplifiers. The TDA7294 comes to mind and is one of the few that (per the specsheet, at least) approaches the measured perfomance potential of good discrete amps.

14th May 2004, 05:00 PM	#1
rulezzz diyAudio Member Join Date: Jan 2004 Location: not nessesary	high performance but cheap amp I want to make power amp of 2x30w.Can you post some links for cheap but good performance amplifier,or maybe i should use chip amp?

14th May 2004, 08:33 PM	#2
destroyer X diyAudio Member Join Date: Feb 2004 Location: Recife - Brasil Northeast	Sometimes can be good to have an adress This way i have what you want, a scratch... and no adress to send you. As this amplifiers cannot be published this way.... only sending directly straigth to you. I have the necessary good will.... but.... without adress.... Carlos __________________ Try to build an amplifier folks ... it is pure adrenaline!

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15th May 2004, 01:04 AM	#3
tschrama diyAudio Member Join Date: Jul 2001 Location: The Netherlands	Hi Carlos, I'm allways interested in new circuit topologies! Could you mail me a copy? Best regards, Thijs

15th May 2004, 03:01 PM	#5
thanh diyAudio Member Join Date: Jan 2004 Location: ho chi minh city	30w? I use slone's topo. Input stage and vas :2sc1815/2sa1015 output stage:2sb688/2sd718 2sc1815 is very cheap,OK?you can also buy 2sc2240/2sa978

15th May 2004, 03:03 PM	#6
rulezzz diyAudio Member Join Date: Jan 2004 Location: not nessesary	and what do you think about lm's..?

15th May 2004, 03:11 PM	#7
thanh diyAudio Member Join Date: Jan 2004 Location: ho chi minh city	Has anyone here built a Slone Amp or a Tigersaurus?

15th May 2004, 03:30 PM	#8
sam9 diyAudio Member Join Date: Jun 2002 Location: Left Coast	I built a version of Slones 11.4 which is normally ~75-100W but with a power supply that limits it to 45-50W. No problems. You could probably scale it back to 30W but I think you might need to change a couple of resistor values -- probably at least the one that sets the tail current. Scaled back to that power level you could probably use TIP3055 and TIP2955 for output devices with little penalty - on the plus side they have a smaller footprint, cost less and there would be little chance of getting counterfiets (not a trivial consideration, unfortunately). On a completely different tack, 30W is well within the capabilities of several IC amplifiers. The TDA7294 comes to mind and is one of the few that (per the specsheet, at least) approaches the measured perfomance potential of good discrete amps.

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