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Great!! Thank you. this helped me open the D-105u I just bought! 🔥❤️🔥

Thank you so much for all your effort designing this and then giving it back to the community :)

Awesome! Wish there was something like this on the market

Wow! Who would have thought that this was that good? Although I shouldn't have been surprised, when it comes to audio, there isn't anything that Yamaha hasn't done! Everything from playback to music production! I came across a Yamaha CD recorder with built in HDD by accident and I wanted to know why it was so expensive! It looked like a normal CD player! After searching for it specifically I found it being sold for a couple of hundred dollars and bought it, my son has one too and it's the most amazing CD player/recorder that I have ever seen, you can connect it to a screen for the music details, you can use its internal DAC for external components..... And it has a level metre which is in my opinion missing from the majority of CD players! They are going to have to pry it from my cold dead hands after I have died to get it! I'm considering having it buried with me LoL! The model number is CDR-HD1300. There is two different models, one has a larger user replaceable HDD than the other.... Another nice touch! Load all your favourite CDs or tracks into the HDD and let it play all week long! It's kinda like the DVD recorders with HDD.... If you have ever used one, editting out TV commercials or songs from RAGE that you don't like is so easy! I have a pioneer and a Sony DVD/hdd recorder, they run the exact same operating system and both are great and being sold for next to nothing! All highly recommend! Cl Check them out!

When it comes to finding what's causing the noise floor, a single tracer is your friend, especially if it has the RF mode where you can hold the probe above individual components and hear what's going on... Paul Carlson of the Mr Carlson's Lab channel showed how a bad carbon resistor was adding noise (sounded like a thunderstorm was going on inside the resistor). Sure you could have found it via an oscilloscope but the signal tracer was so much faster and easier to use since you don't have to keep looking up at a screen! I personally don't have one but I have always wanted one since I first saw one being used! It's a pity that Heathkit doesn't make the kit anymore! Or at least I think that they don't, haven't checked their website in ages, they are re- making their digital clock though.... Every workbench should have one!

Great job! That puffer jacket screams Melbourne! Good to see someone putting in so much effort who possibly lives local to me..... I think that the benchmark for amplifier restoration is held by X-ray Tony B, he also does a talk over while he's soldering which works better than just listening to an extraction fan or at least that's what it sounded like to me! Besides that! And apart from installing the new diodes which I probably would have sat them a little bit higher from the PCB to give them a little breathing room but the original one's didn't appear to be generating enough heat to burn the PCB so I guess that it's not important.... I really have nothing to complain about! Going up in the voltage rating for the capacitors was definitely a good call! I especially like to go up in capacitor voltage rating if they are located next to or above any heat source, the higher voltage rating is the equivalent of higher temperature rating and helps keep those capacitors live longer.... Which is always a positive for a proper restoration.... I'm looking forward to watching more!

I have the same power amp and it needs repairing, can I ask what happened to yours that it needed repairing?

Thank you

I almost pushed the buy button on one of these as it wasn't expensive but glad I found your video first.

Thz man! I'm searching what is AST and I also have ast A10 amp. You help me a lot.

Well done stick to your guns only you need to be happy, no compromises unless you so desire. Thanks for sharing.

Excelente videos. Mirè los 5 y estan muy buenos. Hace muy poco, comprè un 5650 y tiene un sonido muy bueno. En los costados tiene una madera con vinilo que no me gusta y quiero preguntarte, que madera usaste? Se vè muy linda y el color tambièn.Muchas gracias...

Interesting your comments about replacing all the transistors, I have a Toshiba SC330 amp kind of on the bench, having fun finding suitable transistors, one of the channels input stage - long tailed pair was starting to 'go', it would cause the amps output to spike up to the full supply rail, took out my test speaker, which surprised me as the spikes were quite narrow. So yes, old transistors are a problem.

I find it surprising that it has a noticeable noise floor. I restored a few of the Sony V-FETS (about5-6 TA-5650, 2 TA-4650, a TA-8650 and a TA-F7), nowhere near your level (apart from killer diodes, recap and the usual for these I tend to leave semiconductors alone), and the only one that I found was noisy (hiss) was the TA-8650 (from a noisy pre-amp section, but it is likely because it uses very early ICs). The only thing that I noticed was that the TA-5650 and 4650 tend to buzz a lot if you use noisy inputs (desktop computers, mobile phones) because they are very sensitive to EMI. Not sure whether the noise floor you describe is a hiss or a buzzing noise, but maybe worth checking whether it has something to do with EMI.

Just love the transformer(s)/headphones idea. Brilliant!

Thanks man. Handsome unit there.

I own several of the VFET family, in fact one of the 4650 since brand new. The 4650 has always been the sweetspot of the range. I own a bunch of vintage items from Sony’s golden era. If you ever run across a TA-2244 or a more widely available TAE-86 or TAE-88 you will find preamps that rival modern preamps after some minor restoration.

If you want to do a full resto, it's no one's business to question as to why. I've followed all 5 parts and great outcome. Looking forward to future projects.

Been waiting on this video!! Parts list!! Thanks.

Yeah but here’s the fact. More components in line with the inputs, added electronic distortion. Pretty but a complete failure. $2.37 tops and that includes shipping.

By any chance you have the part number of the rectifier replaced? And the heat sink used on those 2 transistors on driver board? Nice video, very informative. Thx.

Hi what are the new tubes you put as a replacement? And why did you replace them?

I can make my own electrostatic headphones. But what I can't do is the amplifier. I am not an electronics person. That hindered my passion.

You are a modest genius!

Hi .Iam a subscriber of your channel . Your video is amazing. I have a same cd player but the previous version. The cd is not spinning. Pick up is new .it spins sometime but no TOC in display. Eject ,play ,stop and pause micro switches do only the eject function . Any set up to ne done with transport mechanismAny advise could be appreciated.Thanks

Like you I have collected a bunch of amplifiers, all from Yamaha including a P2200, PC2002m, M50 and a MX-1. Can't get myself to get rid of any of them.😄

Do you work on these for customers?

Great idea for the speaker terminals but I have to admit I'am not a fan of the deviders.

I had one of these. Bought it brand new in 1983. It is part of a stack, with the record player on the bottom, amp, radio and tape deck units on top, with everything playing through the amp where the speakers attached. Was a fantastic unit

Excellent work. The silicone pads are so much better for thermal than mica wafers and heat sink grease for the V-FETs.

except bare boards and cabinets everything got changed. 🤔

Please give me some circuit diagrams.

Rummy circle vilambaram podaathadaa they..., paiyaa

noob question but why would he change out good components ? particularly the resistors ?

Great idea to include 3D Printing into the project.Shows your expertise in many fields.Out of curiosity -What printer did you use?Thanks in advance.

Thanks; what is the solution that you use in the ultrasonic cleaning machine?

Love your perfectionist approach.2 questions - What's the make of the green soldering iron you're are using so skilfully?As well you've mentioned pairing/coupling of transistors.How would you pair NPN/PNP output ones in a Class 'A' power amplifier[Krell for example].Many thanks in advance.

These things were big, ugly, stinky, dusty, and I don't miss my massive Sony receiver.

Nice clean job.What's the brand of the suction pump you are using.Looks very effective.

Fantastic work. Greetings from Brazil.

Hello! Could you please share a link to the service bulletin you are referring to in the video? The one that I found doesn't have the info about the necessary resistors' parameters for replacement. I believe they are different for each grade of V-FETs? That's why I would really appreciate you sharing the link! I'm starting restoration of my 4650 and will follow your videos thoroughly. Keep it up and good luck!

Beautiful restoration, the amplifier is stunning indeed. Better than new. I think you could definitely cut way down on the time lapse. I'd much rather see and hear your thoughts on why you are doing what you are doing. Other than that, I loved the entire series on this amp, well done.

Impressive work. Can you please share the name of the glue remover you use?

Those time lapses are not doing justice to the work. I understand the reasoning behind wanting shorter videos, but I don't mind long good ones. Perhaps showing important details for each section in real time? Or including chapter marks so people can jump these sections if they are bored with details? Anyway, it was my first time watching your work and I need to offer my compliments to a job well done.

Absolutely gorgeous restoration

Great job!

Hello, i'm also trying to convert my srd7 to be able to drive pro bias stax headphones so could you please make a tutorial or tips as to how you've done it, thanks!

I OWENED ONE OF THESE!!!

Still got one, from 40 years ago!

So disappointed ...not found any sound demo in the end🫤😟🙁☹️🥺🥹