Class A/B folded cascode amp - Page 2

Khron · 27th May 2007, 05:56 PM

This is a bit off-topic here...

I'm from Romania too, a few hundred km's north of you

I had sent you an email inquiring about the latest version of your evolution of Mr. Bittner's Symasym (schematic, maybe pcb, and in an ideal case, some extra documentation/measurements).

Thanks in advance
Cristi

roender · 28th May 2007, 12:37 PM

Quote:

Originally posted by Khron
This is a bit off-topic here...

I'm from Romania too, a few hundred km's north of you

I had sent you an email inquiring about the latest version of your evolution of Mr. Bittner's Symasym (schematic, maybe pcb, and in an ideal case, some extra documentation/measurements).

Thanks in advance
Cristi

I've send you an e-mail with all the necessary details for implementing "symasym roender style"
Regarding symasym, whatever variant may be, it will measure much better than folded cascoded amp presented here but it will sound a little bit "worse"
Keep in mind, however, that this is a subjective opinion.
I suggest you to test each variants and choose what you like more

atiq19 · 16th July 2007, 01:26 PM

Roender,

Can I have construction details for your amp?

I'll need pcb layout and building instructions for your amp.

How does it sound if I was to listen vocal based songs?

Many thanks.

Atiq

atiq19 · 17th July 2007, 11:12 AM

Roender,

I don't know why you can't reply me to:

atiq192003@yahoo.co.uk

Regards

Atiq

roender · 17th July 2007, 01:10 PM

I can't recommend you to build this one because I don't have a finished PCB. Also, there is a small problem with front stages PSU.
I'll update the thread when all this problems are solved.

Symon · 17th July 2007, 01:41 PM

Just for reference MikeB also worked on a folded cascode design.

Ultrafast NoCap-ClassAB

roender · 17th July 2007, 01:52 PM

Indeed, very similar design, but only as topology

atiq19 · 17th July 2007, 02:08 PM

Roender,

Thanks for your reply. I thought you already tested and finished that amp! What happened to the PSU in front end? I suspect it's minor. How do you compare this version with Mike's Symasym?

Cheers!

Atiq

16th July 2007, 01:26 PM	#13
atiq19 diyAudio Member Join Date: Jun 2007	class a/b folded cascode amp construction Roender, Can I have construction details for your amp? I'll need pcb layout and building instructions for your amp. How does it sound if I was to listen vocal based songs? Many thanks. Atiq __________________ Atiq19

17th July 2007, 11:12 AM	#14
atiq19 diyAudio Member Join Date: Jun 2007	class a/b folded cascode amp construction Roender, I don't know why you can't reply me to: atiq192003@yahoo.co.uk Regards Atiq __________________ Atiq19

17th July 2007, 02:08 PM	#18
atiq19 diyAudio Member Join Date: Jun 2007	class a/b folded cascode amp update Roender, Thanks for your reply. I thought you already tested and finished that amp! What happened to the PSU in front end? I suspect it's minor. How do you compare this version with Mike's Symasym? Cheers! Atiq __________________ Atiq19

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27th May 2007, 05:56 PM	#11
Khron diyAudio Member Join Date: Jul 2005 Location: Finland	This is a bit off-topic here... I'm from Romania too, a few hundred km's north of you I had sent you an email inquiring about the latest version of your evolution of Mr. Bittner's Symasym (schematic, maybe pcb, and in an ideal case, some extra documentation/measurements). Thanks in advance Cristi

17th July 2007, 01:10 PM	#15
roender diyAudio Member Join Date: Sep 2006	I can't recommend you to build this one because I don't have a finished PCB. Also, there is a small problem with front stages PSU. I'll update the thread when all this problems are solved.

17th July 2007, 01:41 PM	#16
Symon diyAudio Member Join Date: Mar 2002 Location: Herts, UK	Just for reference MikeB also worked on a folded cascode design. Ultrafast NoCap-ClassAB

17th July 2007, 01:52 PM	#17
roender diyAudio Member Join Date: Sep 2006	Indeed, very similar design, but only as topology

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