Looking for the best SQ Phono LCR schematic

[jev]

Found this one LCR-RIAA

Roehrentechnik

 

[analog_sa]

Found this one LCR-RIAA

Roehrentechnik

You probably don't realise how off topic is this

 

[jev]

No I don't - this is LCR info right

 

[MrKettle]

Hi there MrKettle,

Would you like to share the design or parts of... I’m very interested in LRC RIAA and I would like to use triode cascodes as much as possible (personal preference). I have played with ltspice last night and concluded that a 6k approach is the best compromise (in a simulation). The problem with 6k aproach is I can’t find the coils anywhere.

Regards,
Silviu

Sorry not to pick this up earlier, but there is a thread on the valves section now. I had the inductors wound to spec by Sowter, but as they have a design number now (on the circuit on that thread) they could be remade by Sowter quite easily.

 

[savu]

Sorry not to pick this up earlier, but there is a thread on the valves section now. I had the inductors wound to spec by Sowter, but as they have a design number now (on the circuit on that thread) they could be remade by Sowter quite easily.

Thank you for the insight... would it be wise to go fully differential?
I love fully differential audio. But probably this will double my noise floor so I’ll have less SNR.

Best regards,
Silviu

 

[Hificat]

I have 3 stage phono preamplifier with riaa separately between stages. What if keep this topology but use lcr for one of the chains olny (or both)?

 

[2A3SET]

Just got a pair of LCR from acoustic dimension, seems oem by ALLNIC? Also saw similar module on Thomas Mayer's machine.

 

[2A3SET]

Other than shishido, I am thinking also about this with hybrid mu-follower, first stage with d3a or 8010 second with 417a.

 

[Schmitz77]

This is passive EQ unit and it sounds lame, lame, lame compared to an active one.

 

[2A3SET]

I hear you
Really I can’t stand behind 834.
Salas valve itch is mellow with voskhod 6n2p and melz metal base 6n8s while I enjoyed a lot.

 

[merlin el mago]

Just got a pair of LCR from acoustic dimension, seems oem by ALLNIC? Also saw similar module on Thomas Mayer's machine.

Thomas Mayers uses LCR from Acoustic Dimension.

 

[waltube]

I am following this thread with the last posts.
I am working an a full original Tango LCR riaa.
With a friend of mine who bought the stuff to make a full iron phono.
I have tested some configuration.
And done dozen of test lab with my two Audio Precision.
The results are good , at the moment I can't show anything because it is still in progress.
What I can see around LCR phono is the missing of real test lab; hundreds of simulation only.
Someone can help me to find a complete test lab on LCR riaa?

In addition I have read lot of considerations around simulation; this is a limit for me.
In my opinion after the simulation, if there are tech consideration written, a real test on a proto ( or final stuff) must be shown.
This to give something like "certfication" .
This is what I have learned after years of article published on Audioreview magazine; but also here in some thread.


Walter

 

[alexanderfa]

Hi everybody,
Does anyone have build a very good sounding LCR phono?
I build shishido with hashimoto LCR 600 and the result is disappointing..

 

[2A3SET]

I just build the shishido today with acoustic dimension LCR and ssvh2, it sounds bit better than salas valve itch, quieter and more refined.

 

[alexanderfa]

I am using an external tube regulated power supply, I have no noise.
The gain is low, and the sound is not impressive at all and looks like bit distorted

 

[2A3SET]

Gain is a bit low but not too far probably 35db total, my others are 38-40db.

I am using 6n23p, at 17ma they are very hot.

 

[alexanderfa]

What LCR modules are you using and what coupling capacitors? Do you have also bypass cathode resistor with capacitor?

 

[2A3SET]

Acoustic dimension LCR 600 (oemed by allnic), first stage 33uf obbligato bypassed with ft-3 0.22uf, output stage obbligato 1.5uf. Rk is bypassed with 1000uf.

 

[alexanderfa]

Thanks for the info

 

[2A3SET]

Said too earlier, as I only listened to couple of vocal records, now a bit more big pieces I think salad valve itch phono is overall better, bold and authentic

Maybe Shishido first stage gain is too low, next will try first stage with ec8010 and gyrator mu follower, a longer journey...