Hello!Hello
It have the same thd spectrum but arround -87 db of distortions, that is arround .008% of distortions at 50 watts output in 4 ohm.
Bye
Gaetan
If these figures are accurate for the THD are correct, this is a very good result!?
When you finish making this amplifier will do the measurement with the "Clio" and I check these ate your results accurate?!
cheers
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I pray that this forum member?Hello
I have received a warning in a email by a member of the forum, so I want to say that my amp are my intellectual property and that nobody do have the right to use it for commercial purpose.
Bye
Gaetan
People, compare the two schematics!?
thanks and cheers
Attachments
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post5 schematic.
Where should R8 tap into the +ve supply rail?
After R9 as shown, will inject output voltage into the LTP tail and will give C2 a lot of work trying to attenuate that ripple voltage.
Should R8 tap into the +ve supply rail before D2? or somewhere else?
Hello Andrew
The diode D2 ideas come from an old RCA amp, Aksa use that same ideas.
The diode R8 should be after R9 and after D2 as shown in my schematic, because D2 blocks rail voltage drops under heavy load, preventing bad effects on the LTP and the VAS. The 100R R9 resistor in series helps to reduce the switching noise of the diode and serves to decouple the supply, with a cap, from the main supply rail.
Bye
Gaetan
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Give changing the appearance of the schematics.Hello Andrew
It was to late to edit my post to correct a typo error.
It should not be "The diode R8 should be after R9"
It should be "The resistor R8 should be after R9"
Bye
Gaetan
thanks
Hello Gaetan8888, Can I use c5200 and a1943 for the output stage for this amp? Thank you for your reply.
Regards,
Boyet
Hello
Yes, but those transistors are not for a 100 watt amp, so you really need to put two of each of those output transistors in parallel, like in the image.
It's better to mach all the transistors that you put in parallel.
Bye
Gaétan
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Hello
Yes, but those transistors are not for a 100 watt amp, so you really need to put two of each of those output transistors in parallel, like in the image.
It's better to mach all the transistors that you put in parallel.
Bye
Gaétan
Thank you very much Gaetan..I want to try this amp. thanks again.
Regards,
Boyet
Thank you very much Gaetan..I want to try this amp. thanks again.
Regards,
Boyet
Hello
Read all the thread, there is usefull informations.
Bye
Gaetan
#24
Join Date: Aug 2009
Default change name of Q5 TO Q7
Thanks,
joel Thanks,
joel
Hello Joel
Did you made your pcb and try the amplifier ?
How does it sound ?
Bye
Gaetan
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