(re)searching for a better preamp - Page 51

safetyman · 1st March 2006, 06:16 AM

Quote:

Originally posted by rudi
Hi Safetyman. i have replied to your mail. thanks very much. i have a feeling that you are not receiving my mails

rudi, something strange is happening. I just received a copy of the mail you sent to me when you received the package.

and there's no other mail from you, and the same from t. too. Wonder which side of the telcos is screwing up.

rudi · 1st March 2006, 06:26 AM

Maybe you can skype me www.skype.com . i have send several other mails aswell. and i resend a few

filholder · 1st March 2006, 10:36 AM

Hey is t. about?

I want to hear his impressions of the SMPS version of Rudis board. I have been chopping up Rudi's bottom board in photoshop for the last few hours removing the PSU and shortening the signal path on the board bottom board.

Ok its a quite day here and i am bored!!!

I was just wondering whether to etch it or not.

Phil

filholder · 1st March 2006, 10:45 AM

Sorry i should mention that its just i want to try building either the dual reg version or the SMPS since i have parts for those.

Phil

Nuuk · 1st March 2006, 11:32 AM

Hi Phil,

t is at work and does not have internet access there.

jaudio · 1st March 2006, 12:13 PM

Can Walter Jung circuit be biased to class A?

filholder · 1st March 2006, 01:34 PM

Thanks Nuuk,

I might give it a go anyway, and to be honest i will try it with one SMPS. I would have thought that a 1amp -12v rail would be enough for an opamp, even one this beefy surely. I mean the maximum is 400 milliamps per channel so a total of 800 mill amps but thats got to be shared on the plus and the minus rails hasnt it?

Phil

Nuuk · 1st March 2006, 03:07 PM

I also would have thought that one SMPS is man enough for an opamp!

I know some people report an improvement with a linear supply running from a transformer that is much larger than is required but I believe that is for reasons other than the higher current supply! (Don't ask)

rudi · 1st March 2006, 03:27 PM

Quote:

Originally posted by Nuuk
I also would have thought that one SMPS is man enough for an opamp!

I know some people report an improvement with a linear supply running from a transformer that is much larger than is required but I believe that is for reasons other than the higher current supply! (Don't ask)

Well I believe that each one of us have our eccentricities.

But you can increase and increase and have no change. But once you go WAY over what is considered adequate, only then do you start to hear a difference but sadly it is so small that it really isn’t worth the money you send to get there. But if you have the option to do so, by all means go ahead.

safetyman · 1st March 2006, 03:36 PM

Rudi, which diode for D1 and D2 in the schematic? I tried searching the thread but couldn't find it. I swear I sa it somewhere in the thread b4. BTW, I have ask for authorisation thru your Skype.

1st March 2006, 11:32 AM	#505
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	Hi Phil, t is at work and does not have internet access there. __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

1st March 2006, 03:07 PM	#508
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	I also would have thought that one SMPS is man enough for an opamp! I know some people report an improvement with a linear supply running from a transformer that is much larger than is required but I believe that is for reasons other than the higher current supply! (Don't ask) __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

1st March 2006, 03:36 PM	#510
safetyman diyAudio Member Join Date: Jan 2004 Location: Terengganu, Malaysia	Rudi, which diode for D1 and D2 in the schematic? I tried searching the thread but couldn't find it. I swear I sa it somewhere in the thread b4. BTW, I have ask for authorisation thru your Skype. __________________ Shehzad Aleph 3 - Diehard fan

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1st March 2006, 06:26 AM	#502
rudi diyAudio Member Join Date: Jul 2004 Location: .	Maybe you can skype me www.skype.com . i have send several other mails aswell. and i resend a few

1st March 2006, 10:36 AM	#503
filholder diyAudio Member Join Date: Jan 2005 Location: london	Hey is t. about? I want to hear his impressions of the SMPS version of Rudis board. I have been chopping up Rudi's bottom board in photoshop for the last few hours removing the PSU and shortening the signal path on the board bottom board. Ok its a quite day here and i am bored!!! I was just wondering whether to etch it or not. Phil

1st March 2006, 10:45 AM	#504
filholder diyAudio Member Join Date: Jan 2005 Location: london	Sorry i should mention that its just i want to try building either the dual reg version or the SMPS since i have parts for those. Phil

1st March 2006, 12:13 PM	#506
jaudio diyAudio Member Join Date: Oct 2004	Can Walter Jung circuit be biased to class A?

1st March 2006, 01:34 PM	#507
filholder diyAudio Member Join Date: Jan 2005 Location: london	Thanks Nuuk, I might give it a go anyway, and to be honest i will try it with one SMPS. I would have thought that a 1amp -12v rail would be enough for an opamp, even one this beefy surely. I mean the maximum is 400 milliamps per channel so a total of 800 mill amps but thats got to be shared on the plus and the minus rails hasnt it? Phil