Simplistic NJFET RIAA

[RCruz]

You can experiment with 15.1nF but it will increase highs and tighten the bass even more.

I would Let it settle for a while... Bass is still there but more detailed.

Did you decouple the psu lines just before the shunts ?

I used 1000uF Nichicon there and it gave the needed "woomph" I was missing when I reduced the 15.7nF cap.

Nichicon (the BIG can ones) are bass heavy.

 

[merlin el mago]

OK I will left for a while.

No, I have to parallel 1000uF at the input reg?

 

[RCruz]

Yes.

If you use a bass heavy cap in the shunts input you will notice an increase in subjective bass woomph.

 

[RCruz]

Michael Percy has some big 2200uF Nichicon Super Through with golden pins.

I can not find more 1000uF anywhere.

Look at the caps near the shunts: http://www.diyaudio.com/forums/analogue-source/129126-simplistic-njfet-riaa-641.html#post2596495

 

[merlin el mago]

Fortunately I have 1000uF 63V Pana FC, now are installed I will report back asap.

 

[merlin el mago]

Michael Percy has some big 2200uF Nichicon Super Through with golden pins.

I can not find more 1000uF anywhere.

Look at the caps near the shunts: http://www.diyaudio.com/forums/analogue-source/129126-simplistic-njfet-riaa-641.html#post2596495

I don't see any big lytic cap at the reg input, I suppose you use Obbligato film?

Look this 1.100uF 63V BHC slit foil DNM-designed Capacitors also you can get 10.000 T-Network suitable for mains PSU cap

 

[RCruz]

Near each shunt, to the right, there are the 1000uF 100v big caps.

 

[merlin el mago]

Are these:

 

[merlin el mago]

I don't like 1000uF/63V Pana FC input in ehac shunt reg. possible reason is that I'm using BG 10.000uF/63V as mains filter caps PSU

 

[RCruz]

Yes those are the caps.

Pana FC seems to do not go well with your smoothing BG´s.

Are you using an external PSU?

 

[Audiofanatic]

BG

Hola Felipe,

Ami no me gusta los BG ! Cuestan mucho y los panasonics FM suenan mejor y cuestan menos.

I'm not a fan of BG's they are OK but I cost a lot and Panasonic FM's are to my ears the best. To bad they don't have all values and voltages I need ;(

Best regards,


Audiofanatic

 

[RCruz]

Every cap has it´s signature... they all sound differently depending on the listener and the system used.

IMO the Nichicon are better for this case because of it´s bass lift.

 

[merlin el mago]

I have double box (RIAA box inside R-Core+PSU+Reg box)

 

[merlin el mago]

Hola Felipe,

Ami no me gusta los BG ! Cuestan mucho y los panasonics FM suenan mejor y cuestan menos.

I'm not a fan of BG's they are OK but I cost a lot and Panasonic FM's are to my ears the best. To bad they don't have all values and voltages I need ;(

Best regards,


Audiofanatic

Hi/Hola Jose

Pana FM only arrives till 50V & I need minimum 63V because voltage after reg is 55V

 

[merlin el mago]

Every cap has it´s signature... they all sound differently depending on the listener and the system used.

IMO the Nichicon are better for this case because of it´s bass lift.

Do you have a very good combo: mains cap filter 10.000 or 15.000 Jensen 4 pole works very well in highs & Nichicon 2.200uF 100V Gold Tune works very well in lows (I know because I have 8 caps 10.000 Gold Tune in my Borbely balanced preamp)

 

[RCruz]

That is correct... I really like the 4 pole 15000uF Jensen.

 

[merlin el mago]

I know I have 4 pole 10000uF Jensen & sounds very good.

Have you ever ear KG Super Throught?

I suspect BHC slit foils 4 pole NTC network sounds very similar to 4 pole Jensen...

 

[Audiofanatic]

Every cap has it´s signature... they all sound differently depending on the listener and the system used.

IMO the Nichicon are better for this case because of it´s bass lift.

Hi RCruz,

I'm with you for 100%, regarding the Nichicon Bass lift, I love this cap for it's transparency (after break in) in the mid and low region !


Cheers,

Audiofanatic

 

[merlin el mago]

Thanks for advice Jose

 

[Audiofanatic]

No hay de que !

Don't mention it, my pleasure !