NAIM NAIT 2 DIY

[Oleg Turbin]

Good day
Dear gents
After few months of work I make the Nait2 main board to aluminium case

 

[planet10]

I owned a NAIT 1 and 2 NAIT 2s. Nice little amplifier.

dave

 

[Oleg Turbin]

Nait1 better than Nait2 ?

Next step on my diy Naits way is make a Nait1 board

P.s Nait1 is make a JV hands design and need more and more time for draw gerber ) but I think Nait1 is excellent shoebox amp!!

 

[huggygood]

I 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.

 

[Oleg Turbin]

Nait3 diy by empty board from China (not my board design)

 

[Oleg Turbin]

I 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.

Thanks Dear huggygood
Now time I complete the draw of Nait3 amp board with better design (old naim stile)
And I wait yours photos )

 

[caowei]

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.

 

[Oleg Turbin]

Good day
Dear Caowei
This is excellent work!!!

 

[Oleg Turbin]

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.

You install the NA005 or other transistors in output stage ?

This is yours design in attachment?

 

[caowei]

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.

 

[Oleg Turbin]

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

 

[Ken Newton]

In case I’ve missed it, was there a Nait schematic published here on the site?

 

[Oleg Turbin]

You mean nait3 schematic?

I make the Nait2 by original board design and parts
Also I use schematic from internet and check any parts from original Nait2 board.

P.s no needs schematic if you have the original board

 

[Oleg Turbin]

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.

My friend do not publish this design in internet
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 …

 

[caowei]

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.

 

[caowei]

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

Thank you for your praise!

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.

 

[Oleg Turbin]

I think the NAP160 have a more soft sound

And the NAP140 have a more fast sound
If you open NAP250 olive you find NAP140 design boards
NAP140 better for new music and new designs

 

[Oleg Turbin]

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.

My friend
Maybe
But I not find the connection of 47uf tantalum cap near bias transistor on yours photo
Maybe this one is old photo ?

 

[Oleg Turbin]

Anywhere I draw of this model naps too ) for myself from original board

 

[Oleg Turbin]

but I don't really like the new naim design

I lovely the old design
“Lamp warm …”