Simplistic NJFET RIAA

[Salas]

Who made your PCB? Want to post here the files, both print and Gerber for all to benefit? You are making the 43.7V version for supplying the driver stage of your EB class A amplifier.
You are going to be so disappointed, your shunt will have so much ripple!

 

[nicoch58]

Sorry prototipe pcb(row hole) ie P2P with only hole with islands copper traslate please

I want ripple !!

for sure not sound as before ,a little better

 

[Salas]

You mean perforated board for general P2P prototyping.

And what topology is your EB phono integrated PSU that you play with its parts?

 

[iko]

Ikoflexer has done a nice open source sim. Congrats. Useful.

It's fun to play with the circuit while waiting for the parts to arrive. I just ordered 100 jfets from Spencer, can't wait for that batch.

Forgot to mention, the simulation file from a few posts ago is all inclusive; I meant it to be easy for any beginner, so all you need is to load that file in ltspice and run it (I have no affiliation with linear technology, I'm just using ltspice because it's free, has no limitations, is actively developed, and quite good). For those experienced the following few lines will be boring. The actual simulation takes a bit of time because the sim parameters are set for more accuracy (helps with the harmonic distortion analysis). After the simulation is run (by clicking on the "running man" button), you can click on the menu on View->Spice error log, which will show harmonic distortion numbers. Or you can click on one of the circuit lines, and it will show the voltage trace at that spot; when you click on a resistor, it will show the current trace through it. Again, maybe not reality, but fun and educational, for sure.

 

[nicoch58]

perforated board : Yes

very basic
dual mono, dual rail, talema 10VA -byv -0.1 snubber - 4700uf epos -fuse

as for rc or crc, better do the same on 0V ie CT ??

 

[Salas]

Yes, this is your rectification. But what follows for regulation on the EB board? Series discrete reg?

Your question about CT I don't understand.

 

[nicoch58]

Cental tap ie ground 0V

the reg are on phono pcb

 

[Salas]

perforated board : Yes

very basic
dual mono, dual rail, talema 10VA -byv -0.1 snubber - 4700uf epos -fuse

Looked over EB's website, it looks like you have a discrete MOSFET shunt with a JFET differential controller on your phono board that you supply with the above rectifier/raw filter. I don't think that it has a main feeding CCS before it. I see local ones for shunt parts. Or it does not show, because those I saw are more like conceptual schematics.

 

[Salas]

Cental tap ie ground 0V

the reg are on phono pcb

Aha, now I see what you ask for. Don't change anything there, these are local noise filters for Voltage reference semiconductors. Only play with parts quality if you like but don't change the schematic or the values.

 

[nicoch58]

Erno see your shunt , the answer :

"Hi Manu, the schematic looks ok, did you actuallly try it?"

Salas this are 1000 points

 

[Salas]

EB is cool. I respect him as all audio pioneers.

Are his kits being sold with semiconductors in their catalog pricing or just full schematic, PCBs and resistors? Capacitors? Sinks?

 

[nicoch58]

Don't change anything there, these are local noise filters for Voltage reference semiconductors.

you mean on raw PSU?

 

[nicoch58]

full kit with match jfet

 

[Salas]

you mean on raw PSU?

I mean on 704/41B you posted.

 

[nicoch58]

well I can play with psu

Ps there is a trick on is site look on sale

not kit price

 

[Salas]

There is a PDF price list to open, under Kit Pricing.

 

[nicoch58]

as for RC or CRC I mean on psu... 0V rail

I have the a lot blu panasonic to put in , like this

 

[Salas]

Do it there but do not change the R total. Now time to stop OT, we bore people caring about the ''Simplistic''.

 

[nicoch58]

Raw psu are on topic

just cut in half


tipic

 

[Salas]

One is ''sale'' items on discount, the other is catalog.