Thanks Dear huggygoodI don't forget you Oleg, I just have other things to do at the moment, but as soon as I can, I completely disassemble my Nait 3 and take some nice pictures for you.
Now time I complete the draw of Nait3 amp board with better design (old naim stile)
And I wait yours photos )
Hello Oleg
Looking at the Nait 3 that I repaired a while ago, its power amplifier part was burned out. Therefore, I redesigned the PCB and perfectly replaced the burnt circuit board. It looks really good, and I think this is a successful repair.
Looking at the Nait 3 that I repaired a while ago, its power amplifier part was burned out. Therefore, I redesigned the PCB and perfectly replaced the burnt circuit board. It looks really good, and I think this is a successful repair.
Attachments
You install the NA005 or other transistors in output stage ?Hello Oleg
Looking at the Nait 3 that I repaired a while ago, its power amplifier part was burned out. Therefore, I redesigned the PCB and perfectly replaced the burnt circuit board. It looks really good, and I think this is a successful repair.
This is yours design in attachment?
Attachments
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HI, Oleg
The output transistor uses BD743, and I have seen Nait5 use it before.
I think the NA005 transistor used in Nait2 and Nait3 is BD743.
The board on your attachment image is a nait3 PCB that I drew in 2013,
That was my debut DIY Naim amplifier drawing ten years ago.
The output transistor uses BD743, and I have seen Nait5 use it before.
I think the NA005 transistor used in Nait2 and Nait3 is BD743.
The board on your attachment image is a nait3 PCB that I drew in 2013,
That was my debut DIY Naim amplifier drawing ten years ago.
You are guru in China HIFIDIy )
Excellent!!!
My first naim nap140 clone I make in 2010 year by hadmade board (laser printer and asid diy)
https://flic.kr/p/9LaQZT
With Black Gate and Mundorf and other HIFI caps )
Also my naim NAP160 DIY amp
https://flic.kr/p/2oQ8XfY
Excellent!!!
My first naim nap140 clone I make in 2010 year by hadmade board (laser printer and asid diy)
https://flic.kr/p/9LaQZT
With Black Gate and Mundorf and other HIFI caps )
Also my naim NAP160 DIY amp
https://flic.kr/p/2oQ8XfY
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My friend do not publish this design in internetHello Oleg
Looking at the Nait 3 that I repaired a while ago, its power amplifier part was burned out. Therefore, I redesigned the PCB and perfectly replaced the burnt circuit board. It looks really good, and I think this is a successful repair.
Because many traders make this and sale with low quality and with mistakes after that boards place in Ali with not correct components ) this not right way
P.s please check your design of NAP15*S in Ali
I found 3 mistakes in board design
Boards is not working by mistakes design
But traders sale and sale this …
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Hi Oleg
Thank you for your kind reminder. The first version of Nait3 I made in 2013 did indeed have some issues. At that time, it was cleaned up in China at a lower price and users were informed of the specific points of the problem, mainly due to some wiring not being connected.
This year, the newly designed Nait3 PCB was mainly used for maintenance. A Chinese player insisted that I help him repair his Nait3, so I redrawn the PCB. This version of Nait3 is very perfect, but I did not sell it to the market.
You mentioned that the NAP155XS currently being sold on Alibaba is also perfect. There are no errors in the current version, as the first version has an incorrect sample in my home and I have not sold it to the public.
The attachment is my NAP155XS, which is currently in service in my system.
Thank you again for your reminder.
Sincere greetings!
Caowei.
Thank you for your kind reminder. The first version of Nait3 I made in 2013 did indeed have some issues. At that time, it was cleaned up in China at a lower price and users were informed of the specific points of the problem, mainly due to some wiring not being connected.
This year, the newly designed Nait3 PCB was mainly used for maintenance. A Chinese player insisted that I help him repair his Nait3, so I redrawn the PCB. This version of Nait3 is very perfect, but I did not sell it to the market.
You mentioned that the NAP155XS currently being sold on Alibaba is also perfect. There are no errors in the current version, as the first version has an incorrect sample in my home and I have not sold it to the public.
The attachment is my NAP155XS, which is currently in service in my system.
Thank you again for your reminder.
Sincere greetings!
Caowei.
Attachments
Thank you for your praise!You are guru in China HIFIDIy )
Excellent!!!
My first naim nap140 clone I make in 2010 year by hadmade board (laser printer and asid diy)
https://flic.kr/p/9LaQZT
With Black Gate and Mundorf and other HIFI caps )
Also my naim NAP160 DIY amp
https://flic.kr/p/2oQ8XfY
NAP160!!! This is a very early NAP, or a handmade PCB, which is very interesting and I believe it will sound good!
This ancient NAP is very attractive to me. I have repaired a NAP120 before, and the circuit board is the same as this NAP160. They sound really great, and I think it sounds better than the olive green NAP.
The attachment is the NAP120 that I repaired last time, and the most interesting thing is that it is numbered S/No: 175. It is the 175th amplifier manufactured by Naim audio.
Attachments
My friendYou mentioned that the NAP155XS currently being sold on Alibaba is also perfect. There are no errors in the current version, as the first version has an incorrect sample in my home and I have not sold it to the public.
The attachment is my NAP155XS, which is currently in service in my system.
Thank you again for your reminder.
Sincere greetings!
Caowei.
Maybe
But I not find the connection of 47uf tantalum cap near bias transistor on yours photo
Maybe this one is old photo ?
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