I really enjoy your videos and how you explain things so well. You are obviously a highly skilled electronics technician.

When cleaning pots I always spray a little where the moving part meets the main body! It makes them more much more smoothly, especially in old kit! I recently had a Behringer X32 digital mixer that when rotating the controls to sweep the EQ curve - it would do it in random increments which upset a lot of engineers who were using it at the venue! I sprayed a small amount of Isopropyl at the moving part/body connection and it moved way more freely. This removed the juddering effect and got the desk 100% again! Nice vid, good work Sir!

well I wonder if the same problem was going on in the past with vintage gear . you are an amazing man with a great talent and are very knowledgable and I look forward to watching your videos all the time because I always learn new things and you make it very easy to understand and make it fun as well and all the best and keep up the great work

I like the old NAD stuff. Nice looking, plain and sounded good. I like a lot of old vintage stuff like Rotel, Carver, Marantz, Mckintosh and many of the Japanese stuff as well. Lets face it most of it was made in Japan. I miss the days of the high end stereo.

@izzzzzz6

4 жыл бұрын

I just see blown NAD amps so they can't be that good.

@filmjazz

3 жыл бұрын

@@izzzzzz6 Do you fix broken equipment? If so, that might explain why you only see blown NAD amps. All of my 35 year old NAD Monitor Series equipment is still working perfectly in 2021.

@izzzzzz6

3 жыл бұрын

@@filmjazz That's great I actually threw one out because i couldn't be bothered to fix it. I have Leak and Quad amps plus some BSS, lab gruppen / Martin audio. Also Rotel and Marantz. Got a couple of Audiolabs sitting right here right now. i have seen 2x NAD's that leaked high voltage into the speakers and destroyed them so i just hope your speakers don't fall prey to the poor protection system, these amps clearly lack a decent speaker protection system.

@filmjazz

3 жыл бұрын

@@izzzzzz6 I have the 2400 THX amp, but I'm not using it currently, only the 1600 preamp and occasionally the 1700 preamp. There's also a 7600 receiver I got dirt cheap that works but should be checked out. Sounds like I should have the 2400 fully looked over before putting it back into service.

I have this same problem with the volume knob. Every time when the knob is turned up or down, it made a loud hiss/noise before finally settle down. After viewing your video, I think I will try to DIY and clean the affected areas. Thanks for the great idea!

Hi! I'm very impressed of your electronic knowledge and really enjoy your vedidos i cannot imagine why people would trash you other than they are air heads! I think your knowledge is brilliant and as far as i am concerned from what i have learned from you i would like to take you out for a couple of beers! I can't thank you enough for your time! Thank You!!!

Hey, never post comments but had to say thanks, i pulled my 1600 out of service for a few years debating whether to recap it, loud pops in the phono stage starting and stopping records. Lo and behold there was a pile of brown glue right by the caps near the phono inputs. Popped it off and problems gone. Useable again! Thank you.

@12voltvids

11 ай бұрын

The old conductive brown glue strikes again.

Bought one of these last year. Very good sounding pre-amp and tuner. BTW, it's pronounced N-A-D. NAD's philosophy was to create good sounding equipment with few frills and they mostly succeeded. They had excellent circuit design, but used cheaper Taiwanese parts and manufacturing to keep the costs down. I completely re-capped my 1600 with excellent quality Nichicon electrolytics.

@12voltvids

7 жыл бұрын

Yes I know it is N A D, but everyone calls it an NAD, so I did it to piss the purists off. Apparently I did. Listen at 1:36 and you will hear it called an N A D.

Learned so many things, thanks 😊

This week I recapped my 1020A with run of the mill caps. After that, wow it started to sound very much better three hours in from warm up, more details and bass extension and clarity, like every sound bit has been "de-gloved" from hazes. I have a proton AA1100 preamp that's a rebadged 1155. I like NAD preamps. But my 1700 sounds think and harsh compared to the 1020A. Yea maybe it also needs a recap, too.

@izzzzzz6

4 жыл бұрын

3 hours in? How many joints did you smoke in the 1st 2.5 hrs?

Funny, I have this same pre. Mine has some problems with the tuner not working. I am wondering if it is that glue as well?

NAD's simpler stuff was always pretty good in my experience (the likes of the 3020 etc), but things seemed to go a bit awry when they tried to do stuff with more features - I can't say I was ever a fan of any of their receivers, yet some of their stereo pre/power amp packages sounded fantastic back in the day.

Excellent Channel, videos & content, cheers, thanks a lot...

Very interesting to see what kind of problems the conductive circuit glue can lead to!

@zx8401ztv

7 жыл бұрын

Is your multimeter still working? just interested :-)

@DrCassette

7 жыл бұрын

Yes and No. Yes, it does work measuring, and it seems to be accurate. No, not really, because it's now eating batteries, one 9 V battery only lasts a few weeks even with the meter turned off.

@12voltvids

7 жыл бұрын

The music I use is all royalty free content available from musicbakery.com. The first track was called Coming of Age. There is plenty of good stuff at that web site. You can listen to it all, and license what you need for video / film sound tracks.

I just got one of these and the NAD 2100 power amp. Getting nothing out of it at all. This is helpful. Thanks

Appreciate the great tip!

fixed a couple of pre amps and the switching ic that controls the inputs always gives me problem...

The volume control knob. Does it simply pull off? Trying to fix the same problem on my 1700...

any time bon scott and acdc is playing on a fm station good times, love the videos

@12voltvids

7 жыл бұрын

I'm a stick of dynamite!

What was the "soundtrack"? :D I really liked that music.

Good documentary, you find that dam glue modern T.V's and mother boards on P.C's.From my own experience with NAD have thought of changing the switching I.C.

For what years was this circuit glue used in?

very nice, thanks for sharing.

Nice NAD

thanks for yuor videos

Is the upper PCB the tuner? Can it be removed while the pre amp still works? I can get one for not much but I don't need radio, and I want to clean the inside, it looks very dirty.

12voltvids, would you have any idea what would be causing my Yamaha rx v800 receiver to have a dim display the brightness for the display is full but it's still very dim?

@12voltvids

7 жыл бұрын

If it is a fluorescent display then you either have a voltage to the display tube that is low, or the display tube itself is wearing out.

Yes Nad was a quality manufacturer known for putting the money inside, not outside to make it just look pretty. I had a Nad amplifier to repair, no sound, it turned out the speaker select switch had quit working leaving all terminals open circuit. Tryed spray cleaning, no effect. Finally i linked the required contacts to make it work again, the owner was told it needs a new switch, but he wasnt bothered, it worked fine, he was happy enough :-). The brown goo possibly upsets high impedence circuits more than low, op-amp inputs sound likely.

@12voltvids

7 жыл бұрын

The fit and finish on this unit leaves much to desire. Big gaps between the front bezel and top cover.

@ElectoneGuy

7 жыл бұрын

They had excellent circuit design, but used very cheap quality Taiwanese parts. That's how they kept the costs low.

I've seen the input select / tape monitor switching IC's cause problems like the bleed-through. Many times in fact. You might have got a little lucky that they were OK this time. I'm not sure one could readily find replacements anymore except eBay stuff from China, and we know how THAT can be. I worked on a 1700 a few months back. The input etc IC's were bad and a bunch of other stuff. Lightning struck. Ugh. Got 'er done though...

This royalty free music is starting to get catchy, is that your favourite one? I did enjoy that few seconds of AC/DC TNT :D

Amazing that the crappy circuit glue is a source of those issues! Is this problem common in primarily Chinese/Taiwanese manufactured components?

@12voltvids

7 жыл бұрын

First units I saw it in were Japanese VCRs. It is a problem whenever it has been used. Don't know what type of cement it originally was.

Can you check conductivity of this glue with your multimeter ? it must be in the 100 kohms range

@12voltvids

4 жыл бұрын

Not really because you will be measuring the circuit resistance. You can watch the results on the screen of a vcr with a servo that won't lock and then lock up once the glue is removed.

I was going to mention those input Ic’s where I’ve ran into trouble with the glue, but I think you found it.

Another good video.

@12voltvids

7 жыл бұрын

Not according to 2 a55h0les

@ElectoneGuy

7 жыл бұрын

Make that 4 a$$holes now...

Well done for the job, but i would replaced the leaky caps as well.

@12voltvids

6 жыл бұрын

Ran Tausi All the leaking caps were replaced.

Nice! Whoever thought I would say "nice" about snot....LOL

Why did they have to destroy a nice preamp by putting a tuner in it? :D

Owned a 1600 once. Good sound + features. Unreliable, tho'.and very hard to work on. Be sure to replace all electro caps, esp. phono.

Would've been interesting to put your ohmeter across the blob of glue out of circuit to show it being conductive.

@12voltvids

7 жыл бұрын

It's going to be very high indeed, but in a high impedience circuit you don't need much leakage and you have a problem. You can hear it. As soon as I removed the glue from the end of the flat wire where it went to the record dub switch the leakage went away.

@mochs3869

7 жыл бұрын

I did hear it - that was amazing.

@darinb.3273

5 жыл бұрын

I have found solder resin does the same thing just like the circuit glue the resistance is very high but like you said the resistance is high but the voltages and currents in those voltages are significantly affected

You may expect similar conductivity when switches containing grease have been sprayed with deoxid. That grease dissolves, becomes liquid and will conduct and cause shorts.

@12voltvids

6 жыл бұрын

I have see that wnen idiots use WD40 as a contact cleaner, but naver experienced it with Deoxit or Nutrol

@1959Berre

6 жыл бұрын

I have seen it with deoxit. I disassembled the switches, the slush was all over the contacts. I had to clean the contacts with a toothbrush the remove the blubber.

The 7100 has a power amp built in but looks the same as this 6100.

RCA made by Hitachi had this glue (compact VCR) I worked on many of them

What type of cleaner do you use on your volume controls? Do you use a particular brand?

@12voltvids

7 жыл бұрын

Roger Kerr I used NUTROL on this unit, but have since tried DeoxIT and found it to be very good. will be using that in a future video to test some more.

@rogerkerr5745

7 жыл бұрын

wow, deoxit is expensive stuff.

@cat-lw6kq

5 жыл бұрын

Deoxi T you only need a small amount, one can should last you a long time.

Old video, I know . . . But - ever try using a hot soldering iron to remove old glue? Comes off real fast and easy - try it!

@12voltvids

4 жыл бұрын

Heat gun works too.

Mostly an empty box, well at least it's good for one thing :D

I had a monitor series 7100 receiver it was certainly under rated in power I bought it 26 years ago it was a referb to date I still regret selling it because NAD after the 80’s started to make receivers that were not as good as the 7100 I had a C350 integrated that was a totally over rated and underpowered for the price glad I sold it the 7100 was better and had more head room and dynamics.

33:54 great tip

Dave Jones calls circuit glue hot snot.

@12voltvids

7 жыл бұрын

No he calls hot snot the same thing I call hot snot. That would be the crap go on hot from a hot glue gun. That is hot snot, and it is better than this crap. At least it doesn't break down and go conductive line this.

i repaired so many NAD pieces i consider it PPJ. Plastic Piece of Junk

@Gallagherfreak100

4 жыл бұрын

NAD was known for innovative circuit design, with plenty of dynamic headroom on their power amps, and receivers, BUT, their manufacturing quality control was poor, with lousy soldering. I have a NAD 2200PE from 1988. It's a beast, but, the output relays had to be replaced about 10 years ago. The technician who replaced them was marveling about the over sized power supply and capacitors, but, he said the relays were about the crappiest he'd ever seen.

@thetweakjunkie1576

3 жыл бұрын

Made lots of $$ over the years fixing this overrated crapola. People believe WAY too much of what they read on the blogs.

Silicone glue goes semiconductive. Kidding.

Unlike meany others , this man actually repairs broken stuff , big up for that , but i have observed a certain skill , specific skill set allowing me to do much more , unlike these guys i first started as a music DJ, then a producer for 10 years , mostly for my self then for others , "and then i got in" the AMP, the result is , kind of guy that will give you Sound finger print of your Circuit , whatever it is , mostly its an AMP, that kind of work even guitar players dont do and they pay a lot for AMPS and Guitars , one would imagine they would ask for that but they dont even ask , i guess only producers know how to do it, 1Khz THD kind of thing but not for THD measurements but for making sure that AMP is balanced and sings well , impossible to do using these small trash speakers ,impossible even for me on studio monitors without gear and much hustle . Since ive seen no one doing it , i guess im the first . And i have drawn a number of conclusion, obvious from just a few measurements. If anyone interested i will make a video, for example Harman Kardon VS Yamaha VS Chinese AMP KIT Circuit on a Mobile Phone charger , giving you a picture of what is the AMPS output , rather then usual EXCUSE " YOU CANT HAER IT " well i can see it that is for sure

@12voltvids

5 жыл бұрын

Anyone can measure distortion with a distortion meter and scope. That gear is mostly suited for the design bench. I had all that stuff when I was in the business and did this for a living. These days i work with minimal gear and make the videos using this minimal gear. The type that hobbiests might have. A meter, steering iron and scope. I dont make money doing these repairs. I am lucky if I make 50 bucks working on this stuff. I make much more than that from the advertising on the KZread video. I have a great setup in my house with giant speakers, but in the shop I just use a small pair. I return equipment to the original operating level. I am not tuning amps for guitarists that are looking for a specific sound. Just putting consumer gear back in service delivering the same sound it produced before it broke.

@dedskin1

5 жыл бұрын

no tools needed , i didnt need it , initally i thotuth i would , i have a scope but it cant do FFT but i didnt need anything , its not so much of a distortion measurement as much as it is making sure that all fits , on my Technics EX300, repair was simple , cold solder joint on driver trans making an overload trigger , hence not working , but its old amp and balanced needed shifting by 5%, i cant hear that , but i can offer it now , very very simple , making sure that Sound is Linear , or if it is Tube amp to satisfy the needs for distortion , i didnt criticize you, i watched youre video , late night , didnt sleep at all, i think as i said that you are good , others brake stuff then act smart repairing ,you do genuine stuff , im not saying anything like that , im just saying due to my decdes long producing XP , i can do that stuff with 2 resistors that is all i use . Cant drive the amp tho , its about 10W, but detailed 10W sure .

@dedskin1

5 жыл бұрын

Im not making 50$ at all , didnt earn anything , i doubt i will , that is why i struggle to offer something that maybe someone will pay for , like paying for Iphone 500$ when its not worth 100$ , that kind of stuff will make me some money , but i need to convince ppl that they need it , and make a trade mark of it , otherwise , its not gonna work , i cant compete with chinese 10$ amps , no one can .

I thought NAD was high end stuff?? hmmm this was interesting

@12voltvids

7 жыл бұрын

Well it is expensive.

@Watcher3223

7 жыл бұрын

IMO, NAD is a swift kick in the ... well, nads. Rather have a Carver or a Marantz than NAD ... but stuff from those brands have been known to use that crappy glue, too.

Those people trying to get you for copyright infringement need to get a life.

@12voltvids

5 жыл бұрын

The problem is royalty free music is "non exclusive" use music. Same with music created using programs like "Smartsound" which builds custom mixes from a database of royalty free content. Someone like Rick Hart will use a music bed of royalty free music and write some lyrics and sing along with the music and publish the result as his copyright music, something that under the license of the royalty free terms he is not permitted to do. Then a 3rd party publishing company will register this remix and it generates a match. Once I file a dispute it is resolved pretty quick, because any publishing house once the gig is up is going to release any claim, because if they don't and it escalates they could find them self in hot water with the original misc producer that sell as royalty free. For stuff created with smartsound that is al you I have to put in the reason for dispute. Just one word, Smartsound and the claim gets released. I could probably do the same for music bakery, but I generally look up the title, and put the link in as well so there is no question where it came from.

Nice looking, too bad it's not silver faced.

@12voltvids

4 жыл бұрын

If it was them people would complain that it wasn't black.

ceralacca, Resins become hydrophilic over time! American HI FI

Huh? 20:40 or 24:00

That just proven how bad that glue is. Do manufacturers use it to lower the life of my hifi so i go buy a new one.

@12voltvids

5 жыл бұрын

It is supposed to prevent damage from shock during transport.

flurocarbons, no bueno for our atmosphere.

You got brown goo all over your NADs lol.

@12voltvids

7 жыл бұрын

I was going to crack a joke about sh1t on the nads, but I manage to get enough thumds down already.

@Sloxx701

7 жыл бұрын

Eh, you can't please everyone, and you might make it worse if you try. Even the big electronics channels have their haters and there's a lot of them. But I'll bet people like Dave, Clive, AvE etc. still aren't starving that's for sure

@12voltvids

7 жыл бұрын

Hehe. The haters, and thumbs down people I bet are those very people that are still trying to make a living fixing this crap. The nit pickers, that point out a typo in a description, or rag because they think a word isn't pronounced properly, really need to get a life. Someone was whining about a typo and suggested I use a spell checker. When I entered a file name to save a render I had a typo in the file name, and of course youtube uses the file name as the title, and I didn't correct it, as it was probably 2 in the morning when I was starting the upload, and I was tired and not paying attention. But it seems that about 20 people had to point it out, like I really give a shit. And then to make a personal attack that because there was a typo that I must not know what I am talking about. All I can say to those people is 2 words, and the first one starts with "F"

@redemptusrenatus5336

7 жыл бұрын

I'd go whole hog on'em and just put typos on purpose everywhere and even a note that the typos are on purpose. hehehe :D

@Sloxx701

7 жыл бұрын

Yeah, I see assholes like that commenting on every channel. I watch blue glow electronics channel also and a bunch of people in comments just had to point out that when he was pointing at a component and said resistor that it was actually a diode. Seriously, he's been restoring amps for 20+ years and his videos are great learning and you're going to waste your time correcting him when it's blindly obvious to even a child what that component is. I see people do that on your channel all the time like OMG THATS DANGEROUS HIGH VOLTAGE are you crazy and I just have to laugh. They think you are someone who just started doing this last week.

NAD..Noisy And Distorted.

@12voltvids

5 жыл бұрын

You trying to pick a fight?

@michaelturner4457

5 жыл бұрын

Someone said it to me many years ago, and since then every time I see NAD, that phrase comes into my head :) The other one is BOSE, which nearly always makes me think "Buy Other Sound Equipment". BTW @12voltvids, have you ever had any of those "White Van Speaker Scam" things in for repair or look at? Which is like really cheapo amps and speakers, very poorly made, and are truly awful.

Yeah not a fan of NAD… Anything 80s on seems pretty garbage lol

@12voltvids

2 жыл бұрын

So for you it is "Nasty And Distorted" then.