Welcome all member since I started doing the group buy is now, who did not get the PCb I sent it?
Regardless of reason, by me or by post, would you let me know, I plan to do and sent again to you, would you honestly tell me!
Thank you and hope you always loved the PCB design by me!
Respect
quanghao
Regardless of reason, by me or by post, would you let me know, I plan to do and sent again to you, would you honestly tell me!
Thank you and hope you always loved the PCB design by me!
Respect
quanghao
when did you post?
on the 10th June?
I would expect postage to take about 2 - 3 weeks.
I will go and check post office tomorrow. But i am not hopeful that it will be there already.
on the 10th June?
I would expect postage to take about 2 - 3 weeks.
I will go and check post office tomorrow. But i am not hopeful that it will be there already.
quanghao ,i have a question
What is the voltage swing for silver mica caps in RIAA circuit.
May I use lower voltage like 100V capacitors?
What is the voltage swing for silver mica caps in RIAA circuit.
May I use lower voltage like 100V capacitors?
What voltage will actually be in that part of the circuit.
If i want to do experiment with polyester 63V will this work?
If i want to do experiment with polyester 63V will this work?
Since there is an e-commerce site in Quanghao's signature, and his board GBs have become a steady venture, there is no logic of group buy essence anymore. There is a vendor forum area being offered by DIYA that the interested parties can ask for. Therefore Quanghao's GB threads are closing. Communicate directly for any outstanding commitments. 
Edit: Quanghao asked and got a Vendor forum of his own, old threads moved here.
Edit: Quanghao asked and got a Vendor forum of his own, old threads moved here.
My PCBs arrived last week.
I have a small question the RIAA capacitors on your schematic and on the Andrea's site are not the same value. I know that there are different ways to make RIAA but which one is better?
Regards,
Pred
I have a small question the RIAA capacitors on your schematic and on the Andrea's site are not the same value. I know that there are different ways to make RIAA but which one is better?
Regards,
Pred
Ok! the PCb is good??
The RIAA , Andrea have new RIIA, in the my Cricuit! I test New the RiAA is better!
I have calculated 2 set of values for the RIAA.
The first was to work at lower impedance to get vey low noise but this mean higher capacitors value so only MKP can be used.
The new set of value allow have higher impedance and allow to use Jensen paper oil and silver mica capacitors.
At this time I don't have tested the new values.
Quanghao have build both the versions and he prefer the new as sound.
The first was to work at lower impedance to get vey low noise but this mean higher capacitors value so only MKP can be used.
The new set of value allow have higher impedance and allow to use Jensen paper oil and silver mica capacitors.
At this time I don't have tested the new values.
Quanghao have build both the versions and he prefer the new as sound.
