The Phono Stage - Page 3

Peter Daniel · 27th September 2009, 05:25 PM

It's best to order them directly from the source: http://www.v-cap.com/tefloncapacitors.html Notice the discount for 2pcs or more.

hayenc · 27th September 2009, 05:33 PM

Worked great. Thanks Peter.

Peter Daniel · 27th September 2009, 05:37 PM

And don't forget to break them in

http://www.diyaudio.com/forums/parts/152329-breaking-teflon-caps-post1931175.html

Although I never did it with mine; they seem to work fine right from the start.

cyxg · 28th September 2009, 02:06 AM

Quote:

Originally Posted by Peter Daniel

I'm sourcing MJE1530x from Digi Key. All op-amps have SMD pads already.

beautiful PCB!

toufu · 28th September 2009, 02:36 AM

Peter, what's the gain for the phono amp? Is it for MC or MM?

Peter Daniel · 03:16 AM

It is for MC with 75dB gain.

toufu · 28th September 2009, 04:43 PM

Is it easy to modify the circuit to lower the gains to work with MM cartridges? Or are you planning to design an MM version of the circuit?

chrismercurio · 28th September 2009, 04:55 PM

Quote:

Originally Posted by toufu

Is it easy to modify the circuit to lower the gains to work with MM cartridges? Or are you planning to design an MM version of the circuit?

I doubt it...

Peter's original postings indicate that it is his version of the Phonoclone which in turn was inspired by the 47 Laboratory Phonocube. The low gain version of the Phonocube is 75db, the high gain is 90db and the overall gain achieved is wholly dependent on the cartridge impedance.

You can read about it here:

http://sakurasystems.com/products/47phono.html

but the details are sketchy. I had a Phonocube for a year or two about 8-9 years ago and it remains in my mind as one of the best sounding phono stages I have ever heard. It was also the quietest which is a big deal as far as I'm concerned.

Peter Daniel · 28th September 2009, 05:16 PM

To be precised, it is my implementation of phonocube circuit. AFAIK, it is exactly same schematic, I'm just using different part choices and different PS. The circuit is different from the phonoclone popularized here, and based on some comments from people who built both, it's also better sounding. With proper selection of opamps, it does not require output coupling caps (offset stays below 2mV if you are lucky, on average it is below 10mV).

To get idea on the sound, you may read this review (of the original product): http://sakurasystems.com/reviews/reviews9.html

I wasn't much into vinyl myself and I always though that well done digital playback system can equal analog. After listening to this phonostage in a well assembled analog rig (modified Versa Dynamics with ZYX Universe silver) I now simply don't think it's possible: the vinyl is so much better

woodturner-fran · 28th September 2009, 05:28 PM

mmm. Now I'm just going to have to build this one. I've had a couple of iterations of RJMs phonoclone and also a pass pearl with lundahl step-ups so I think this would be a good one to add to that mix. Gonna have to sell some of the other though. 5 phonostages is just excessive!

Fran

27th September 2009, 05:25 PM	#21
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	It's best to order them directly from the source: http://www.v-cap.com/tefloncapacitors.html Notice the discount for 2pcs or more. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

27th September 2009, 05:37 PM	#23
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	And don't forget to break them in http://www.diyaudio.com/forums/parts/152329-breaking-teflon-caps-post1931175.html Although I never did it with mine; they seem to work fine right from the start. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

28th September 2009, 02:58 AM	#26
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	It is for MC with 75dB gain. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC Last edited by Peter Daniel; 28th September 2009 at 03:16 AM.

28th September 2009, 05:16 PM	#29
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	To be precised, it is my implementation of phonocube circuit. AFAIK, it is exactly same schematic, I'm just using different part choices and different PS. The circuit is different from the phonoclone popularized here, and based on some comments from people who built both, it's also better sounding. With proper selection of opamps, it does not require output coupling caps (offset stays below 2mV if you are lucky, on average it is below 10mV). To get idea on the sound, you may read this review (of the original product): http://sakurasystems.com/reviews/reviews9.html I wasn't much into vinyl myself and I always though that well done digital playback system can equal analog. After listening to this phonostage in a well assembled analog rig (modified Versa Dynamics with ZYX Universe silver) I now simply don't think it's possible: the vinyl is so much better __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

27th September 2009, 05:33 PM	#22
hayenc diyAudio Member Join Date: Apr 2005 Location: Glendale, AZ	Worked great. Thanks Peter.

28th September 2009, 02:36 AM	#25
toufu diyAudio Member Join Date: Jun 2008 Location: San Francisco	Peter, what's the gain for the phono amp? Is it for MC or MM?

28th September 2009, 04:43 PM	#27
toufu diyAudio Member Join Date: Jun 2008 Location: San Francisco	Is it easy to modify the circuit to lower the gains to work with MM cartridges? Or are you planning to design an MM version of the circuit?

28th September 2009, 05:28 PM	#30
woodturner-fran diyAudio Member Join Date: Jan 2006 Location: Ireland	mmm. Now I'm just going to have to build this one. I've had a couple of iterations of RJMs phonoclone and also a pass pearl with lundahl step-ups so I think this would be a good one to add to that mix. Gonna have to sell some of the other though. 5 phonostages is just excessive! Fran

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
NS-10 phono stage	ponger	Pass Labs	9	28th March 2011 08:57 AM
DIY phono to replace roksan phono stage	seroxatmad	Analog Line Level	6	14th December 2008 05:46 PM
new phono stage or old preamp with phono?	flohmann	Analog Line Level	2	2nd October 2008 09:51 PM
phono stage	sakis	Tubes / Valves	20	24th March 2008 08:22 AM
Should I replace Scott 222C phono stage with Claret phono stage?	Bing Yang	Analogue Source	0	22nd August 2005 06:41 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read