#96 - Servicing NAD C350 stereo integrated amplifier 

@Melvin Ezekiel The scriptkiddy gets haxord.

How do you know about NAD service centers replacing with 15000uF?

@@feedback-loop Because I found a post by a repairman who said: "The problem you will have is that the original caps are only 35mm in diameter with no room for anything wider. IIRC when NAD supplied replacements they lowered the capacitance, also make sure the ones you fit are rated at 105 degrees, the originals were 85 degrees and I had to change quite a few over the years"

@@feedback-loop And also because a much bigger (more power and headroom) amp in the range the NAD 317 has 28.200uF total of buffering. For this 'small" C350 30.000uF had to be more than fine.

I got mine for $90 USA and so far so good, still running strong for 10 years

www.vintageshifi.com/repertoire-pdf/pdf/telecharge.php?pdf=Nad-C-350-Service-Manual.pdf

50V

@@feedback-loop I was hoping that the voltage was slightly lower than 50V, so you do need 63V as a minimum. I have looked on the RS Components website in the UK and the best I can find at 63V is dimensions of 40x80mm manufactured by Kemet which I think maybe too tall for your application. I am based in the UK but work mainly in Denmark, I have become friends with a gentleman in Viborg who runs a business repairing and restoring new and vintage, high-end HIFI equipment. I will ask him for some advice for you in the hope that he may have a solution to your problem. I really enjoy the videos, keep up the good work. Best regards John from the UK and Denmark.

@@M0XFXUK I have seen such caps on Digikey or Mouser or both. 80 mm caps won't fit. I will keep looking. This is not urgent. The original ones are not failing yet. Thanks.

@@feedback-loop Arrow electronics (arrow.com) have 22000UF 63V 40X60mm in stock manufactured by Kemet part number: A533HK223M063G.

@@M0XFXUK I am afraid that 40 mm diameter is too large. The original ones are about 35 mm and almost touching each other.

Because they are real fake, it's the capacitor inside that knocking xD

@@Irilia_neko Ahhhh I see! That's incredible! I had the same problem with the filter caps that came FACTORY inside my Harman Kardon AVS235!!

@@Johnathan_Waters because people think à Large capacitor it's better, open the blue can and you will find the real value normally, otherwise mesure the capacitor wen it's working it's clearly not a high voltage, just don't touch the PCB when measuring the voltage by principle.

@@Irilia_neko Thank you for this info!

@@Johnathan_Waters my pleasure if that can help ^^

In my view the TongHui is quite good. 0.25% basic accuracy. The model I have supports up to 100KHz. It was about $300 some years ago. The input connectors are a bit flimsy, so I had to take it apart a couple of times to bend the contacts slightly towards each other, so that they would make better contacts with the plug. I have never seen Hantek.

@@feedback-loop thanks for your feedback and videos.

Andrew Pratt I will buy a DER EE DE-5000 this year. Best bang for buck. Only 100€ with accessories.

@@Todestelzer That looks like a good recommendation, thanks!

@@feedback-loop I was surprised that it could read the larger capacity of those capacitors! I have a few different capacitor testers but they can't read the larger capacitors! That's a real problem because I have a couple of those cheap eBay Chinese capacitors that I purchased some time ago and I was planning to use on a project but now I'm not so sure that I'm going to use them! I might end up putting them in a test circuit and let them charge and discharge to see how they will perform over time. I don't mind if their capacity is lower than rated, as long as they don't fail into a short circuit. It's also possible to make up your own capacitor bank using a perf board and multiple smaller capacitors, the ESR will be super small and it's easier to get better brands in the smaller values...

I've seen your repair vids. Nice jobs. I just repaired a 315 model and again essentially all the caps that are smaller then 220uf are completely shot !

At least they are made to NAD specs.

Well, it was not really a repair, it worked before, but you are right, I should have shown some test at the end.

Looks like these should do, but I did not try myself yet: www.mouser.com/ProductDetail/United-Chemi-Con/ESMH630VSN223MA65S

You know the rattling it's because it's a small capacitor inside ^^

thank you

Superglue and things like baking powder can sometimes work rather well, too

Wikipedia says: "NAD is an abbreviation for New Acoustic Dimension"

@@feedback-loop be that as it may, as an acronym, it is in itself a word.

You are, probably, right. Someone, who lived next to the original office in London, also commented that it should be pronounced as a word. I have to remember.

The company name is "Nad" but it does form an abbreviation.

@@SamFirthDesigner it isn't an abbreviation, it is an acronym.

"just buy a new one" is an invalid command on this channel 😁

@@TestEquipmentAnonymous just trying to mix it up and have a laugh.

@@TheGmr140 Hehe, yep.

Speaking of new, has anyone seen the new Yamaha amplifiers? They still have that old school style look on the outside and they actually look very good on the inside too! I could be mistaken for saying this but it's almost like buying a new old stock amplifier! Even Technics has released new Amplifiers that appear to be like their older stuff! Who knows, maybe a cassette deck is in the pipeline? I really hope so! With the world population growth, and vintage equipment slowly disappearing, there's just not enough of it to go around for everyone so I think that it's great that the old school masters of hifi building from Japan are back at it. Now all that we need is to get it made in it's rightful place, Japan.