Mpp

[FdW]

Originally Posted by Joachim Gerhard

I rebuild the input stage of the little Pre-Pre to Frans circuit. It works very well. Hum is really zero and the sound got better too, more musical and warm and less dry and over controled. Noise is not audible at the listening place at high volume so my concern was over carefull. I also designed a fitting shunt feedback RIAA. The ADA4898 can deliver 40mA clean so i am using a PhonoClone circuit with much reduced impedance for lowest noise of the second stage. There is an AC and DC coupled version with servo. This little project on the side got me really exited : We have now a Balanced Super Simple Phono Clone that can be fitted close to the cartridge.

Please note that, to get a good CMRR, you need 0.1% (or better) resistors (for the 2 100 resistors).

[Joachim Gerhard]

I used Dale 55 0,1%.

[Joachim Gerhard]

Your phono pre, Frans, sounds excellent, absolute top, though. This was no criticism on your design. It is more a matter of style.

[Joachim Gerhard]

Maybe this is of interest for the academics :https://www-docs.tu-cottbus.de/kommu...ESENTATION.pdf

[FdW]

Originally Posted by Joachim Gerhard

Your phono pre, Frans, sounds excellent, absolute top, though. This was no criticism on your design. It is more a matter of style.

No, no, I am taking it as an compliment

[FdW]

Originally Posted by FdW

No, no, I am taking it as an compliment

To be more clear, the simple single opamp differential amplifier of my riaa, that is used as an input buffer (in effect a pre pre), was widely criticized and even dismissed. To see it popup, here, is (for me) recognition, and validation, of the qualities of the original design.

[Joachim Gerhard]

That is a bit odd because conventional phono clones ( input into Pin 2, Pin 3 to ground ) are much liked on this forum and i think your differential interpretation is an improvement.

[FdW]

Originally Posted by Joachim Gerhard

That is a bit odd because conventional phono clones ( input into Pin 2, Pin 3 to ground ) are much liked on this forum and i think your differential interpretation is an improvement.

Joachim, I cannot see where this is going, so I try again.

I think I was just saying the same thing (as you), and at the same time I tried to convey a message to the 'opamp'-skeptics.

My point was that the mere fact that I was using an opamp was criticized (by many, not you, you stated that you liked the design (as others did)). As I said in the thread, I think the time is there, opamps are ready for the BIG jobs, and that is why I designed my RIAA using only opamps as active devices (in the signal chain).

On the same time I am not dismissing that you can make 'a better' amplifier using discrete devices, but then we have to recognize that if you can do it with discrete than it should be possible to do it with opamps (maybe not now, but soon).

We have now arrived (after 30 years of opamp development) where we need to select devices (opamps and/or discrete devices) by looking at the application, and we are free to choose the one or the other, we no longer have the 'luxury' to select discrete devices all the time, just because ‘they are better’.

Yes, my design sounds great (anyway that is what the people at Friclefest told me ) and it is not the final answer, especially in relation to noise. But the tiny 8 legged monsters have come a long way, for many the message should be; these (the opamps) are no longer the monsters we thought them to be; they have grown up and can hold their own ground, some are growing into real treasures.

I hope this clears it up

[Bksabath]

Originally Posted by FdW

My point was that the mere fact that I was using an opamp was criticized (by many, not you, you stated that you liked the design (as others did)). As I said in the thread, I think the time is there, opamps are ready for the BIG jobs, and that is why I designed my RIAA using only opamps as active devices (in the signal chain).


Yes, my design sounds great (anyway that is what the people at Friclefest told me ) and it is not the final answer, especially in relation to noise. But the tiny 8 legged monsters have come a long way, for many the message should be; these (the opamps) are no longer the monsters we thought them to be; they have grown up and can hold their own ground, some are growing into real treasures.

I hope this clears it up

Hi Frans
I had not much time to read properly the last few posts loads of work at day job and weater is so nice that one get home and sit in the garden with chilled botle of Sol and lime.

I realy started to folow this tread (see my old post about my INA LT1028 MC phono) as I am learning and growing tanks to you all here.

I like the 8 leged critters and I will certanly folow that up so please keep posting, at the same time I like the Paradise as it offers me a real opportunity to learn a lot (by time I did ) + if it sound as good as "it is just there" or "when I feel like taking it out of the system" is all a big plus.

So I am going to build both and a few more like Douglas Self MC pre pre (Just need a suply) and the lot from Sound of Silence.

Yes I could go to the shoop and buy the last magazine-rave-in-a box for less.
What sodisfaction one get from ownership escapes me.
Al I want to say is just KEEP POSTING I am learning, making nice music, keeping busy doing no harm to no one and I tank YOU for that.

Who cares about the rest?

[FdW]

Originally Posted by Bksabath

Hi Frans
I had not much time to read properly the last few posts loads of work at day job and weater is so nice that one get home and sit in the garden with chilled botle of Sol and lime.

I realy started to folow this tread (see my old post about my INA LT1028 MC phono) as I am learning and growing tanks to you all here.

I like the 8 leged critters and I will certanly folow that up so please keep posting, at the same time I like the Paradise as it offers me a real opportunity to learn a lot (by time I did ) + if it sound as good as "it is just there" or "when I feel like taking it out of the system" is all a big plus.

So I am going to build both and a few more like Douglas Self MC pre pre (Just need a suply) and the lot from Sound of Silence.

Yes I could go to the shoop and buy the last magazine-rave-in-a box for less.
What sodisfaction one get from ownership escapes me.
Al I want to say is just KEEP POSTING I am learning, making nice music, keeping busy doing no harm to no one and I tank YOU for that.

Who cares about the rest?

Posts like this make my day, PM me I have a present for you