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Old 8th February 2013, 07:12 PM   #1081
mihailo is offline mihailo  Serbia
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Are these 2K2/2W resistors enough for TL071?
Regards
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Old 8th February 2013, 08:51 PM   #1082
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Originally Posted by mihailo View Post
Are these 2K2/2W resistors enough for TL071?
Regards
With rail voltage +/-35V 1k/2W can be use instead 2k2/2W.
Regards
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Old 8th February 2013, 11:05 PM   #1083
mihailo is offline mihailo  Serbia
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Thanks Apex. I'm planing to use transformer with 2x25V~ .
Will put two 2K2/2W resistors in parallel.
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Old 9th February 2013, 09:08 AM   #1084
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Originally Posted by marestiani View Post
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
Click the image to open in full size.
hello sir can you mail SR50 pcb layout to shravanth.reddy@yahoo.com plz...
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Old 9th February 2013, 09:14 AM   #1085
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hello apex sir which amp is best quality amplifier at 100w
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Old 11th February 2013, 08:34 AM   #1086
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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!
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Old 13th February 2013, 02:22 PM   #1087
Vostro is offline Vostro  South Africa
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Quote:
Originally Posted by Nassos View Post
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

Last edited by Vostro; 13th February 2013 at 02:25 PM.
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Old 13th February 2013, 04:28 PM   #1088
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Quote:
Originally Posted by Vostro View Post
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?
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Old 21st February 2013, 10:53 PM   #1089
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Quote:
Originally Posted by Nassos View Post
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.
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Old 14th March 2013, 05:19 AM   #1090
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Originally Posted by apexaudio View Post
PCB in progres...
how about the pcb of SR400?
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