The problem with transimpedance RIAA is that you have to consider the output impedance of the stage before the frequency shaping network and also the input impedance of the following buffer. Both impedances appear in parallel to the frequency shaping networks.
Best is to publish your design and then one of my team puts that in the simulator.
I still use pencil and paper hard mathematics plus trimming but i know that i am a dinosaur.
Best is to publish your design and then one of my team puts that in the simulator.
I still use pencil and paper hard mathematics plus trimming but i know that i am a dinosaur.
Buddies,
you are reallythe best !
Thxalot, orders are filled...
Btw,
how are you actually driving the boards, prereg isn't finished yet, is it ?
you are reallythe best !
Thxalot, orders are filled...
Btw,
how are you actually driving the boards, prereg isn't finished yet, is it ?
I will drive the boards with the Opus Magnum pre regulator.
The pre regulator boards from Bksabath where very hard to solder and one board got smoking .....
The pre regulator boards from Bksabath where very hard to solder and one board got smoking .....
Not yet,
still trying the oral way. 😀
Btw,
this black sun stuff really seems way to tacky to me.
"Nabelschau", you know.
One last thing for tonight. This is what one of my teachers has to say :http://www.adamjhill.com/Hill + Hawksford - RS25.pdf
Ouch.
What happened to our dutch connection ?
Stuffing german highways with these cute little boxes
they use to attach in the back of their cars ? 😉
What happened to our dutch connection ?
Stuffing german highways with these cute little boxes
they use to attach in the back of their cars ? 😉
I got my original Paradise boards from Hesener today. Many thanks. They still have an oscillation problem. Let´s see what i can do.
The caps I used are 1uF / 50V or 63V DC MKS2 from Wima, they have a pin spacing of 5.08mm. Should be easily obtainable at Buerklin, Farnell, Mouser, Conrad, ...
Yes, these are rev1 boards. I tried all the tricks I am aware of to get rid of the oscillations, but these are pretty stubborn (stuff for me to learn, I guess ;-)
The rev2 boards do not have that oscillation issue, I think. I did put transistors with HFE=510 in mine and it works beautifully. Don't know what Le'Flu used exactly , but he also has rather high values for HFE. His boards also worked at first turn-on ;-)
You are welcome! Please share your findings, this problem is really puzzling me....
Thanks Hesner for your support.
The material ( schematic, BOM, etc. ) you send me for the Paradise R2 is very helpful.
I hope i have the R2 playing soon.
The material ( schematic, BOM, etc. ) you send me for the Paradise R2 is very helpful.
I hope i have the R2 playing soon.