Simplistic NJFET RIAA

[jonners]

Originally posted by salas


Please let me know if I must do the operation doc!

The risks are small, the prognosis very good. There may be some pain immediately after, but the end result should be very rewarding.

Dr.Jonners

[jonners]

Originally posted by kstlfido
Jonners-

Where in the circuit are you using these russian caps exactly?

The paralleled Teflons are the inter-stage 100nF. Three parallel silver micas to ground for the 47nF, one to ground for the 16nF.

Dr Jonners

[kstlfido]

Thx Jonners. Jeez- it must be a really crowded board- those caps are big!

Mmm, I have some 100nF Russian FT-3's.. maybe I should give it a go...

[jonners]

Do it. No anaesthetic though, that's for wimps!

Dr Jonners

[nicoch58]

Nice TT , carbon fiber matt?
your friends need clean better the LP

the psu for TT are another question to answer! a simple caps to derive 70-90Vac for motor.......is important isolate the motor from 220v ? (x2-common mode coke-x2)

Salas do you have a shunt for motor?

[Salas]

Originally posted by ikoflexer
Nice pics! And... how was the sound? Any comparisons with something else?

Great sound. Open, natural, very informative, and deep, vibrant.
Compared some vinyl to same CD albums. The CDP is a Marantz upgraded with all the stuff in the digital forum here on DIY com about it... There is a piano, seeming well and nice on CD. Then you play the same on vinyl. Well, you realize that the first one was a toy piano without any enclosure. Etc, etc.

[RCruz]

That is precicely what I am searching for Salas.

Actually my severely modded CD53 has much more body than the TT.

I really need this jfet RIAA.

Maybe I should try to do one PTP as Lee seems to be too busy right now.

Already ordered the 170BL and need to source the RIAA caps.

Do you have some spare caps I could use ?

Ricardo

[Salas]

Originally posted by nicoch46
Nice TT , carbon fiber matt?
your friends need clean better the LP

the psu for TT are another question to answer! a simple caps to derive 70-90Vac for motor.......is important isolate the motor from 220v ? (x2-common mode coke-x2)

Salas do you have a shunt for motor?

Yes, carbon fiber mat, upgraded ZI spec arm, Origin Live DC motor and DC PSU. So no AC tricks. But if you ask in general, build a Geddon. 500VA trafo good 0.2uF cap for 90 deg phase lag. I have listened with just isolation trafo and yes, the best benefit goes to AC motor TTs.

I have thought about shunt for DC motor. Problem is that they ask for 2-3V and Mosfets open higher. So I must do it with BJT.

Music's over.

[Salas]

Originally posted by RCruz
Already ordered the 170BL and need to source the RIAA caps.

Do you have some spare caps I could use ?

Ricardo

Sorry, I don't keep any more caps than I use for one build at a time. Maybe someone else has. Ebay has right now I think.

[nicoch58]

Originally posted by salas


I have thought about shunt for DC motor