SRPP question

[Higo]

Hello, guys. This is mi second thread in this area.
Despite of I´m electronic engineer, I don´t have any experience in tubes design. I have couple of ECC88 (6DJ8), 12AX7, 12AT7,ECC80 an EL34. I´ve been reading a lot about SRPP (mainly from www.tubecad.com) and presently I´m a little confused. I want to build a pre amplifier for CD/DVD/Tape and, in the future, phono too.
Which configuration do you recomended for a beginner?? SRPP of CF??
I now there are a lot of things involves here, like Zout/Zin/Gain, etc... but I´m interested in the quality of sound, ´cause there are detractors in both sides and mainly in your owns experiences.
Any advice and comment It will be appreciated.
Thanks you.
Marcelo.

[ashok]

The SRPP stage is very useful especially because it has a low output impedance and better gain than the standard stage. For use as a DAC buffer I think it is very good. I have not measured its noise performance but it certainly has better distortion figures. I will check this out again and post some data.
The SRPP is not hard to use even in a phono stage. Note that you can also use a transistor in place of the resistor above the bottom tube. Tube Cad has the details. This is trickier than the plain resistor but performs better.

[Thatch_Ear]

You can do something as simple as using a 12AX7 hooked as follows. RCA plug to potentiometer to one side of tube, twice, for stereo. If you are using it for low level with high efficiency drivers a single 12AX7 can run a stereo SE amp, all on the same chassis. The SRPP has you runing the signal through one side then the next so then you would use 2 tubes intead of one. So if you are single ended you now have 4 tubes, not counting the rectifier. SRPP does have quite a bit going on in a small place so a recommendation is to use an octal based dual triode like a 6SL7 as you have about triple the space in the socket area to work in. This is like building a ship in a bottle, lots of things in a small space that is hard to move around in. Have fun and use the right tools.

[Higo]

Thanks for your answers.
The amount of tubes It´s not a problem. When I said "a couple", I wasn´t clear. The true It´s that I have almost 20 12AT7, 24 12AX7, and 15 ECC88 (6DJ8), 10 ECC80 and 5 EL34. I have others, that I think there aren´t suitable for audio: 7 6F6GT and 4 6AV6.
Imagine that with this amount of tubes I can build a lot of pre amplifiers, and in several configurations... I think that I´ll start with SRPP. For this I started this thread,´cause I´m not sure about the quality of sound that I can achieve with this configuration.
At the moment I´ve been looking for alternatives to the PSU. First I thought in TL783 from Texas, but presently I´m decided in using LM317T.
Thanks for your answers.
Marcelo.