Question if you want to build a Naim amplifier or something well improved, sound much better.
Avondale keep changing the old Naims to their improved clone by hundreds.
Many satisfying customers.
Greg improved the NCC200, that was tested!
Here is the original Naim with the protective circuit.
When I purchased my first Naim clone fro China the first think I did to improve it I removed the parts in purple brackets based on recommendation.
One more time do you want to build something sounds good (similar to Naim) or you want to build the original Naim.
You always go back on the PCB to the original Naim values.
Avondale keep changing the old Naims to their improved clone by hundreds.
Many satisfying customers.
Greg improved the NCC200, that was tested!
Here is the original Naim with the protective circuit.
When I purchased my first Naim clone fro China the first think I did to improve it I removed the parts in purple brackets based on recommendation.
One more time do you want to build something sounds good (similar to Naim) or you want to build the original Naim.
You always go back on the PCB to the original Naim values.
Attachments
Thanks a lot for your advices I had already made a pcb for the Naim Nap with the plan from acoustica org. I know my pcb look different to the original ones, but i like it more to fasten the pcb on the side of a case. I have to learn a lot, but if one amp does not work....thats life...Pcb's are cheap in china.
I have designed a pcb for the Blame St and the Supercharged Blame ST. The Pcb's Carlos had made were rather big. I made smaller ones. The Blame ST Amp is working. The Sound is very good i can say. Nice experiance... 🙂
If the Greg Ball Mod is improved is that very nice and i think an amp will work on my pcb....
I have fun to create a pcb's with KiCad....more fun as to bulit another amp. I have to much in stock....in a shootout the Apex FH9 XRK Mod always win....in the moment....🙂
I had already posted a Naim Nap pcb....see attached files...
Greets
Peter
I have designed a pcb for the Blame St and the Supercharged Blame ST. The Pcb's Carlos had made were rather big. I made smaller ones. The Blame ST Amp is working. The Sound is very good i can say. Nice experiance... 🙂
If the Greg Ball Mod is improved is that very nice and i think an amp will work on my pcb....
I have fun to create a pcb's with KiCad....more fun as to bulit another amp. I have to much in stock....in a shootout the Apex FH9 XRK Mod always win....in the moment....🙂
I had already posted a Naim Nap pcb....see attached files...
Greets
Peter
Attachments
I took the chance to add speaker protection (copied from the TGM10 thread) to my inductor daughter board. It sounds way better than the relay it replaced, I was really surprised, no: shocked. If you fit D6 and D7 you can lift one leg of each protection diode on the original amp board. More details of my NAP clone you can find here. Schematic including values for the inductor see here:
Last edited:
I have a question. I'm not sure, Do Naim amplificator's zero volt (PSU) connect the ground?
"the damping resistor to a value between 10% and 50% of the nominal output load value.
i.e. for 8ohms try values from 0r8 to 4r, not the 175% value that is 15r." I will try. nobodys says the meaning of 15 ohms. is it related with https://www.diyaudio.com/community/threads/nap-140-clone-amp-kit-on-ebay.112453/post-4323248
https://www.diyaudio.com/community/threads/nap-140-clone-amp-kit-on-ebay.112453/post-4323815 says
"the damping resistor to a value between 10% and 50% of the nominal output load value.
i.e. for 8ohms try values from 0r8 to 4r, not the 175% value that is 15r." I will try. nobodys says the meaning of 15 ohms. is it related with https://www.diyaudio.com/community/threads/nap-140-clone-amp-kit-on-ebay.112453/post-4323248
I have used 1 ohm with parallel with inductor since 10 more days. there is no difference for any kind, heat or sound. amp stays plugged almost always. Cables are nearly 3meter and parallel standard 2.5mm radius. I did't twist it.
Good day
Original Naim system use a Naca5 speaker cable
His a have of the all good enough parameter's
for no need use the inductor in amp output
BBC systems use a different cables
who known what brands and parameters ..
And for BBC amps Naim installed inside inductors
beard with biting protection has been going on since 2004 by doing this you remove the desired bit of the amplifier and doom it to go beyond the operation of the output stage the consequences of this decision are burnt out speakers and amplifier..
Now I think that new naim's DIY's have oscillation and to avoid that high frequency oscillation, there is 15 ohms (not 1,2 or 10 ohms) // 1uH. Not for only cable capacitance problem. And we don't know BBC systems output RL filter's damping resistor value.
I didn't decrease high freq. oscillation with MJ transistors (MJ15003, MJ15030..) on LTspice simulation. I used orig. parts.
