NAP-140 Clone Amp Kit on eBay

Jump to Latest
traderbam

traderbam

Member
Joined 2002
Ian Finch said:
Linn speakers don't seem to have the profile they gained with just a few models in the Linn-Naim years and they've had quite a few talented designers in the meantime. Are they still a significant retail force?
Click to expand...
Linn nearly went bust in 2006. Banks sent people in to downsize them. I don’t know how well they are doing now. Looks like form over substance now. I audtioned Majic speakers recently, expecting the old Linn magic, but no. Did they lose the recipe? Did they economize the quality away?
 
traderbam

traderbam

Member
Joined 2002
Bigun said:
I'd like to hear the NAP 140 on a pair of Totem Model 1's. I don't own these speakers but the memory of them from a listening session at a local store still lives on. I simply can't bring myself to pay the asking price for a pair of small box 2-ways.
Click to expand...
Before I left the UK, I auditioned my amps on these: Kudos Super 20A
I was really impressed. Very good imaging, PR&T, visceral bass. Nice looking cabinets too. I could have bought the shop's demo pair for a discount, but they were still gert expensive and I declined. Now I am in Canada and I want them! No dealers near here. :(
 
Bigun

Bigun

Member
Joined 2009
diyaudio.com/community/threads/tgm8-an-amplifier-based-on-rod-elliot-p3a.245619/
Paid Member
Ian Finch said:
At how many Canuckbucks, roughly?
Click to expand...

As they say down at the Bentley dealership "if you have to ask...."

In some reviews published several years ago I saw mention of US$3k/pair

They aren't cheap, that's not their position in the market, but I liked what I heard from a pair of Model 1's about 20 years ago. I didn't buy them, I ended up buying PMC speakers instead.

I think there are plenty of good speakers on the used market these days but this is OT for the this thread.
 
Last edited:
Ian Finch

Ian Finch

Member
Joined 2010
Paid Member
I don't even think to drive a Bentley but I have splashed out on new speakers in the past. $3k is not peanuts but I might have paid the same dollars even 30 years ago if I really liked them. If audio is your passion, there's good reason to buy and no matter what your DIY electronics, you still need good reference speakers to evaluate the sound.
 
traderbam

traderbam

Member
Joined 2002
It used to be better to spend the most money on the front end (turntable) and the least on the back end (speakers).
With digital I am not so sure. I suspect it is still true.
To get the quality I require, I run my PC’s SPDIF coax into a de-jitter device and then into a Mark Levinson DAC. In my case the front end is the most expensive part of my system. However, those Kudos would balance it out. Which tells me I shouldn’t buy them!
 
Last edited:
D

diegodgo

Member
Joined 2006
Dear diyers I intend to buy a kit like this:

He23f630025db4b59af88bada2c50f9be8.jpg


Has anyone assembled this seller's kit? In the announcement it says that the original transistors, what modifications should I make to get closer to the original? Where can I find the original layout and specifications with rest current and etc ...?
 
Last edited:
Ian Finch

Ian Finch

Member
Joined 2010
Paid Member
You don't tell us who the seller is but yes, several members posted their builds and some pics of their plus a reverse-engineered schematic of that NAP200 board a couple of years ago. Those first kits were available from the same PCB maker (CAOWEI).

The boards were excellent but not many semis were original types and no tantalum capacitors were supplied. Sanken no longer made any MT200 size power transistors like the original premium quality types shown, so there was doubt about those supplied. semis as they could have been close copies, bad fakes or pulls (recycled transistors). Only the pulls could be genuine Sanken parts.
Other semis are even more critical to the sound of Naim ampifiers so make sure to stay with specified types. A Naim built with random substitute semis sounds like an awful waste of time and money when you listen.

Have a look at these posts and read on from there:
https://www.diyaudio.com/forums/att...243608-audio-amplifier-2n3005-elektor-amp-jpg
https://www.diyaudio.com/forums/solid-state/112453-nap-140-clone-amp-kit-ebay-218.html#post4609187
 
T

thimios

Member
Joined 2009
Ian Finch said:
You don't tell us who the seller is but yes, several members posted their builds and some pics of their plus a reverse-engineered schematic of that NAP200 board a couple of years ago. Those first kits were available from the same PCB maker (CAOWEI).

The boards were excellent but not many semis were original types and no tantalum capacitors were supplied. Sanken no longer made any MT200 size power transistors like the original premium quality types shown, so there was doubt about those supplied. semis as they could have been close copies, bad fakes or pulls (recycled transistors). Only the pulls could be genuine Sanken parts.
Other semis are even more critical to the sound of Naim ampifiers so make sure to stay with specified types. A Naim built with random substitute semis sounds like an awful waste of time and money when you listen.

Have a look at these posts and read on from there:
https://www.diyaudio.com/forums/att...243608-audio-amplifier-2n3005-elektor-amp-jpg
https://www.diyaudio.com/forums/solid-state/112453-nap-140-clone-amp-kit-ebay-218.html#post4609187
Click to expand...
Still you can buy Genuine 2sc2922 here. 2SC2922Y Power Transistor 180V 17A | Profusion
 
Ian Finch

Ian Finch

Member
Joined 2010
Paid Member
diegodgo said:
I saw on some page recommending this Ebay seller 4 piece NEW SANKEN 2SC2922 GENUINE AUDIO TRANSISTOR FOR HI_END AUDIO ! | eBay. m1438.l2649
Click to expand...
If you follow the parts list posted by algar-emi, you won't go wrong with buying suitable parts types separately but you will find it difficult and expensive to deal with the many suppliers you will likely need so that you get genuine parts of the right type and grade.

As a rule, don't buy important components from Ebay sellers. Some sellers may supply the real deal but not always - They can run out of stock then supply unknown quality or even fakes without saying so or reducing the price. You often cannot tell the difference until you hear the disappointing sound when it is complete. With obsolete parts like these special power transistors, you risk everything when you use fakes, whether you suspect they are fake or not.
 
T

Trainerman

Member
Joined 2011
Hi The Sanken transistors you have seen on E bay ref 438.12649 are the real deal the guy who is selling these runs an audio business and if you look at his shop you will see he specialises in good quality components including these Sanken's which he will tell you are old found stock and he has the original packaging as proof I bought two pairs and they are spot on, hope this helps.
 
C

c3kkos

Member
Joined 2020
Well, as an update, i did it! All wired up, 230v kicked in. It is playing charming music.

I got it up and running with awful wires, none of their lenghts fitted. It is just a raw prototipe. But it is doing really good. Some footage soon!

I'd like to thank Ultima Legione and Ian, who helped me in this 'journey'

A huge thanks to diyaudio forum too. "The glue" to it all.
 
G

george a

Member
Joined 2002
Supply rail Voltage 50v??

Hi All

I have a couple of the LJM nap140 board with 2sc3858 output transistors (they are marked as that - who knows what they really are..)

I would like to have a play with them but only have a +/_ 50V DC supply available
Cludged from a dead Sony Amp....

Any thoughts as to the se of the elevated voltage?
Drivers marked as C5171 & A1930
on board caps rated at 63v


Any comments wold be appreciated

i would like an amp for my old B&W DM/4's

Cheers and thanks from downunder
 
You must log in or register to reply here.
Top Bottom