NAP-140 Clone Amp Kit on Ebay

[Evenharmonics]

Originally Posted by Ian Finch

is the board signed LJM as in the the pic?

It says, "NAP 140 CLONE" and below that shows "LJM". It doesn't say "140C" like other pictures I see on ebay and prints are little different. For example, Q3, 7 and 8 don't show E B C on my board. Also, C1 and C5 are printed reverse on my board.

[Ian Finch]

OK, thanks. It seems to be another, probably newer revision than I've seen, since I haven't yet seen the word "clone" printed on any. It doesn't help you much but at least there is a reason for the confusion.

[Evenharmonics]

Well, I replaced all transistors that didn't pass DMM test and checked and rechecked all the leads but still no change in bias voltage and -34vdc at output. Unfortunately, this board I purchased isn't the same as others. I haven't gotten to light bulb test because I maxed out my allotted time given by my girlfriend. I'm done (for at least 6 months).

Thank you Ian and Ruwe.

[gaborbela]

Slowly I rebuild my Naim clone.
Actually the schematic based on the NCC200 kit. It sound so much better in any way compare to the Ebay Naim kit not even can mentioned in the same league.
I had two Ebay clone, the first I purchased many years back from Tubes hunter that time he sold his kit expensive and with original transistors (not counterfeit)
At first I did like the amp sound I did listen the amp over 6-8 months.
I ordered other kit for the PC board so I can start to test different transistors and capacitors in each place.
Later I found the NCC200 clone so I took the McBride PC board layout and I modded after the NCC200 circuit.
I built the new amp with the same component like my first Ebay kit.
Sound wise Heaven and earth between the amplifier to favour of the NCC200.
After I spent several (4-5) moths testing each place different transistors and capacitors until I get a really great amp.
Now I did not had chance to compare my clone with the orig NCC200 since that way to expensive just to get it for comparison.
All I can say I did listen my clone few mouths and I went back to the Ebay kit to compare it again after burn in.
I could not listening the Ebay kit any more the difference was so huge.
So I sold both Ebay kit..
Now after all those test I have to rebuild my clone because I soldered and re-soldered that PC board over 4-5 month it became a junk..
Now the new PC board was designed so I can test the Greg Ball modification to.
I hope soon I ca report back the result.
I kept one side the orig and another side with the mode.
I do believe it is important to burn in the components so when I test a amplifier I give min. 50hours to the new component to burn in.
Also important to match the components to each-other. Not enough to pick the best components and build.
My experience that often do not gave the best result sound wise!

Greetings Gabor