I/V converter for dac search

[noze]

Hello ...

I'm search a good I/V tube converter for dac (generic).
Anyone can link me a Thread ?
I found some posts on a Thoosten IV converter but not the original treatises where it was developed.
regards

 

[Eli Duttman]

If you have a current O/P DAC chip, working into a setup similar to a phono preamp, minus the RIAA EQ network, can be effective. The I/P grid to ground resistance is kept small, as you only need 4 or so mV. of I/P. For instance, a chip whose O/P is 400 μA. working into a 10 Ω grid to ground resistance yields the targeted 4 mV. signal. The DAC chip is not subjected to undue stress. A 6922 in each channel should be quite sufficient to raise that 4 mV. up to "line" level.

 

[noze]

Hello Eli ... thank for you reply
i found this 3D with many link; but all link are very oldiest and not function.

Thorsten's Valve Output Stage with TDA1541DAC


Okay; I'll try with a resistor.

 

[noze]

Hello Eli... thank for reply ...

I found a couple of 3Ds, specifically this one ( Thorsten's Valve Output Stage with TDA1541DAC)
but they're very old and the links don't work.

But ok ... i try with a resistor.

 

[waltube]

I have used with gret success a coupling with 1:1 trafos from Sowter (3575 or similar).
Then a stage with 6922 gain + CF

Also there is an application note from Analog devices AN-912, it is interesting
Walter

 

[noze]

I have used with gret success a coupling with 1:1 trafos from Sowter (3575 or similar).
Then a stage with 6922 gain + CF

Also there is an application note from Analog devices AN-912, it is interesting
Walter

Srrp gain stage followed by CF or DC Coupled CF ?

 

[waltube]

It is a CF with.
On secondary with resistor + cap you can trim the freq answer.
The resistor onprimary are around 100 ohm.
The output caps are polyprop. not electrolytic, it is my error on diagram.
This stuff works great

Walter