Studio Reference Amplifier - Page 109

mihailo · 8th February 2013, 06:12 PM

Are these 2K2/2W resistors enough for TL071?
Regards

apexaudio · 8th February 2013, 07:51 PM

Quote:

Originally Posted by mihailo

Are these 2K2/2W resistors enough for TL071?
Regards

With rail voltage +/-35V 1k/2W can be use instead 2k2/2W.
Regards

mihailo · 8th February 2013, 10:05 PM

Thanks Apex. I'm planing to use transformer with 2x25V~ .
Will put two 2K2/2W resistors in parallel.

shravanth · 9th February 2013, 08:08 AM

Quote:

Originally Posted by marestiani

I just made SR50 and the sound is great, but the BF's transistor are quite hot when turned on for 5 minutes, is this normal or is there something wrong with the circuit that I created, help me please newbie here

hello sir can you mail SR50 pcb layout to shravanth.reddy@yahoo.com plz...

shravanth · 9th February 2013, 08:14 AM

hello apex sir which amp is best quality amplifier at 100w

Nassos · 11th February 2013, 07:34 AM

Hi to all! I decide to built this amp,but I have only 4+4 pieces of 2sc5200/1943.Is that a problem or not? And a voltage rail +- 60V is enough or too much for 150watt?
Any measurements of this amp?
Thanks in advance for the answers!

Vostro · 01:25 PM

Quote:

Originally Posted by Nassos

Hi to all! I decide to built this amp,but I have only 4+4 pieces of 2sc5200/1943.Is that a problem or not? And a voltage rail +- 60V is enough or too much for 150watt?
Any measurements of this amp?
Thanks in advance for the answers!

I'm using SR200 (AlexMM Rev3.1 PCB) with 3Pairs Output (per channel) with no problems at aprox 63Vdc-0-63Vdc.

Or do you mean 2Pairs per Amp (channel) for stereo at 60V ?

This is GREAT amp to build
Regards

Nassos · 13th February 2013, 03:28 PM

Quote:

Originally Posted by Vostro

I'm using SR200 (AlexMM Rev3.1 PCB) with 3Pairs Output (per channel) with no problems at aprox 63Vdc-0-63Vdc.

Or do you mean 2Pairs per Amp (channel) for stereo at 60V ?

This is GREAT amp to build
Regards

I have a total 4 pcs of 2500 and 4pcs of 1949 instead of 6+6 of SR200...so for a stereo amp I have 2 pcs from each one transistor per chanel...+- 63Volts is ok?

apexaudio · 21st February 2013, 09:53 PM

Quote:

Originally Posted by Nassos

Hi to all! I decide to built this amp,but I have only 4+4 pieces of 2sc5200/1943.Is that a problem or not? And a voltage rail +- 60V is enough or too much for 150watt?
Any measurements of this amp?
Thanks in advance for the answers!

It's OK with 8R speakers.

ahmadfay · 14th March 2013, 04:19 AM

Quote:

Originally Posted by apexaudio

PCB in progres...

how about the pcb of SR400?

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8th February 2013, 06:12 PM	#1081
mihailo diyAudio Member Join Date: May 2010 Location: Serbia	Are these 2K2/2W resistors enough for TL071? Regards

8th February 2013, 10:05 PM	#1083
mihailo diyAudio Member Join Date: May 2010 Location: Serbia	Thanks Apex. I'm planing to use transformer with 2x25V~ . Will put two 2K2/2W resistors in parallel.

9th February 2013, 08:14 AM	#1085
shravanth diyAudio Member Join Date: Dec 2011 Location: hyderabad	hello apex sir which amp is best quality amplifier at 100w

11th February 2013, 07:34 AM	#1086
Nassos diyAudio Member Join Date: Mar 2010	Hi to all! I decide to built this amp,but I have only 4+4 pieces of 2sc5200/1943.Is that a problem or not? And a voltage rail +- 60V is enough or too much for 150watt? Any measurements of this amp? Thanks in advance for the answers!