Very nice Damir. I like it very much. 🙂
edit: It would be interesting to measure the distortion with and without feedback. just for curiosity.
edit: It would be interesting to measure the distortion with and without feedback. just for curiosity.
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Tank you Hugh,
I like the sound a lot, but need more listening, it was just short one.
I know that you like simple elegant work and this one is quite complicate, but ones the layout is set then number of transistors is not important(to me, as small transistors are so cheap).
cheers Damir
Thank you Linuxguru,
As you probably notice I quite the ODNF so no need for your nice discrete opamp, standard OPA is good enough for a DC offset correction.
This is tested version and last schematics. During the test I have found some minor layouts faults, and that is now corrected in the new PCB. The PCB contain two pure mono blocks with separate power supply(shunt regulators) common part is the rectifier with big caps.
Some people showed interest in the PCB and I would like to know how many are to organize group buy. I think that to go I need ten or more interested so please tell me who is.
BR Damir
Some people showed interest in the PCB and I would like to know how many are to organize group buy. I think that to go I need ten or more interested so please tell me who is.
BR Damir
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Damir,
Do you have a LTSpice of the harmonic from a 1KHz at output 1Vrms into 10K?
I would be very interested to see the ratios of the orders.....
Hugh
Do you have a LTSpice of the harmonic from a 1KHz at output 1Vrms into 10K?
I would be very interested to see the ratios of the orders.....
Hugh
I am not sure, more PCBs lower the price. I think that below 10 pc. the price could be not economical, so I would like to get more interested persons. I will ask PCB producer here in Zagreb(I am very satisfied with the quality) how much will cost 10 pc. and let you know.
By the way, one PCB is stereo, so you need only one board.
Originally Posted by RNMarsh View Post
How do I get the PCB?
-Richard
Richard you did not send to me PM with your personal email that we can arrange how to send the PCB to you.
BR Damir
Today I did some more listening, mostly Chesky CDs and SACDs, and some more DVD audio. More I am listening more I come to conclusion that this pre amp is of extraordinary quality. And it shows the strength of my power TT amp too. It did not sound so good never before.
I would like to get list of interested persons for the PCB.
For the moment I have those who showed interest:
pandamiecki
mcd99uk
manso --probably
and that's all, if there is no more people then no PCB production could be to expensive.
BR Damir
I would like to get list of interested persons for the PCB.
For the moment I have those who showed interest:
pandamiecki
mcd99uk
manso --probably
and that's all, if there is no more people then no PCB production could be to expensive.
BR Damir
That is difficult question, and I don't know, both sound so good to me. That could be an argument for the people arguing that absolute distortion is not so important but how harmonics are distributed. NGFB has much higher distortion but very similar benign harmonics distribution to CFA.
BR Damir
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