TDA1541A I/V conversion

Finally got my CD Pro2m transport working with my TDA1541A double crown homebrew DAC. This currently has passive I/V followed by Thorstens ECC88 valve output stage.

The CD player sounds great, however, I always want more!! I have heard people say that there are better ways of carrying out I/V conversion than the simple resistor arrangement and am currently contemplating the use of Peda Rogic's design uaing a 2SK170 and AD844, possibly still followed by a valve stage. There are also a few designs using discrete transistors such as IRF610's floating around.

Does anyone have any experience of different designs?

Cheers,
Ian

Ive got something you might be interested in trying. PM me

Hi
Have sent PM

Cheers
Ian

[leo:)]

I've tried a few I/V stages with this dac, Pedja's AD844 common base is one of my current favourites, I'm going to try out the Pass D1 next

I have a Pass D1 and psu, constructed 1 month ago Ive nothing to do with it as Ive gone in another direction. Thats the info I had for Ian!

I was thinking of trying Pedja's design but taking the output after the first opamp (pin5) and feed that into a triode output stage.

The other alternative is the D1 design. The problem being that the PSU's are quite different and I don't want to build both. Secondly the Pedja design uses 78 series regulators which I believe are not so good. I suppose I could use LM317 and LM337 regs, though I had also considered super-regs (expensive).

The CDplayer as it stands uses a CDpro2m with separate powersupplies for the display/controller and for the 5v and 9v supply. The DAC is homebuilt around TDA1541A double crown with super regs for the +5V, -5V and -15V. I/V conversion is passive and feeds Thorstens ECC88 triode output stage.

All the transformers, rectifiers and smoothing caps are in a seperate box (like Naim).

I am pretty pleased with the player so far, but would like to take it as far as I can.

Cheers,

Ian