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Hi, I have a 725 hooked up to a 770; when i turn ON the 770, the red power light comes on, but none of the indicator LED's do not turn on. I purchased brand new RCA's just to be sure, but still no dice. I bought the pair from an ebay seller and he swears up and down that it "was working".... Any advice would be greatly appreciated

Hi, I have a 725 hooked up to a 770; when i turn ON the 770, the red power light comes on, but none of the indicator LED's do not turn on. I purchased brand new RCA's just to be sure, but still no dice. I bought the pair from an ebay seller and he swears up and down that it "was working".... Any advice would be greatly appreciated

I am having a headache watching your video as you move around quickly while holding each circuit board to show the components that possibly needs replacing. It would be better if you keep the circuit boards on the table then slowly move the camera along the components including the opposite soldered board side as you explain the possible faulty parts and your suggested solutions to restore vintage stereo. Your video presentation is very informative and Love learning from your presentation.

Magnificent work

Hi, I’ve just come across your youtube on the Sansui AU717 amplifier restoration. I live in the UK. I take it the AU710 is the same as the AU717 due to it looks identical or was the AU717 made for the American market. Are the components available to buy online. I haven’t switched it on for years, but when i did, it sounds great. I am worried now if i switch it on i might do damage to my speakers or the amplifier.

What's sodder?

Build like a tank👍🏻👍🏻👍🏻

Great videos, really appreciated the longer format restorations, I also repair and restore vintage audio equipment next to my regular job although I rarely see hign end masterpieces like this one and it's preamp companion on my bench. Thanks for showing your methods and approach to problems, used tools and circuit modifications. Looking forward to the next one!

Thanks,I had no idea that Kyocera made stereo gear; I've only associated them with optical and ceramics products.

Absolutely magnificent work! You are a genius and so modest! Your music selection is glorious! I have actually downloaded these songs! I hope you have kept the Technics SE A7 amplifier! It is absolutely beautiful!

A1943 & c5200 Work in this amp?

Thank you for taking the time to do this restoration and capture it on video, and share it with the rest of the world. I have owned many of the Kenwood L-series pre amps and amps and as a person who does hobby restoration, I ran into the same issues in trying to restore my MKI L07C... the traces lifted and I admitted defeat and ended up scrapping the unit. Damn shame because I got so many years (decades actually) of enjoyment. I also ran into the oscillation issues with the L07MII amps in where I immediately put them up for sale and reverted back to the MKI amps. Even with these issues, they are just such quality pieces of gear and they provide such a beautiful sound. Thinking back I want to say I've gotten about 30+ years of enjoyment out of them before parting ways and going with <somewhat> newer equipment. I ended up replacing the L07C with a Sony TA-E88 which I feel is superior, but still the Kenwood stuff is just great. Thanks again for the video and hard work, it shows!

I have had many, and I mean many of these amplifiers... they are fantastic. Unfortunately, the MMII are the worst of the bunch given their defects.... but its great to see that you have come up with a solution for servicing and repairing them. This looks better than new. Over the years the MKI amps were the ones I held onto the longest because they did not suffer from these defects. I was fortunate enough to also own several L09M amplifiers which were built like tanks, but I eventually sold them as they did not perform well at low impedances. L07/09 are absolutely fantastic amps though, if only there were more qualified/skilled technicians out there capable of servicing them..... and enough people with fat enough wallets willing to pay. Really great work though, impressive!

the first video of yours I've seen. I love all the detail. thanks for taking the time to make this. I learned a lot.

How much will be charged for this restoration?

vu and peak.

Should have shown the back of it.

4 minutes in and I'm seasick from the floating camera. I'll have to watch this in parts unless the camera gets stationary at some point

That’s fantastic

Beautiful piece

Hi I am a new subscriber and can’t wait to watch your videos

👍 👌

Nice work mate, though my focus is the service and repair/reverse engineering of metal detector technology I can fully appreciate your work and level of detail. The hardest job for us these days is parts, I buy alot of job lots of new old stock transtitors ics diodes, some old parts are just not available today modern replacements bring often more problems, but diligent searching can yield what u need there is nothing better than looking for an out of production chip and turning up so military spec metal can versions or ceramic ones, better spec than the plastic originals. Nice clean proper work top marks mate.

They were one slot in hight due to the fact there was a corresponding pre amp you could get which made them standard hight when together.

The best repairs i've ever seen. So much details and knowledge always showing passion and love. Keep going. Congratulation !!!!

I need a frame of reference for this headphone, would appreciate if anyone can tell me how it compares to HD800S, Arya Stealth or Susvara?

Nice job , well done.

Such amazing workmanship! A true master! I need my nad 3020 restored but I live in South Africa! But man, I want you to do my restoration

Качество звука делает бренд пристижным

Is this a field where they grow capacitors?

Hay, We Interested in a collab with you? Let us know how to connect!

Wow... my 919 can benefit your artwork desperately..

Great video covering the LO7's. I rebuilt a pair of these a couple of months ago and mine did not have the black flag capacitors just had standard polystyrene types. They are an interesting design construction wise and I found them easy enough to work on. I did find some of the original electrolytic capacitors were actually starting to leak out around the pins (The LO7 preamp was quite bad in some areas due to these caps leaking not to mention that dam glue and this was loaded with blackflags) I love your TO3P modification thats so ingenious and looks very professional. I have I've been restoring vintage audio for years and a new sub to your channel. You do some amazing work and look forward to future videos. All the best! 👍

Wow great content 👍

That was an absolute masterclass, you are a wizard. That AU-717 is an absolute UNIT! You do fabulous work, thanks for sharing your tips. I have a TU-517 and TU-717 that I use nearly daily and wow is it a musical combination. The Pre-Power switch on the back was sketchy on mine and it took a week of giving it a daily spray of Deoix and and actuating the switch a dozen times while the sat on it's left side one day, and it's right side the next back and forth for about a week and now years later it is still preforming wonderfully.

fab work!

I enjoy these long restauration repair videos a lot. How do you do the volume control service, can you do a video on that? All Regards, Ieberich

Nice work sir.

I recently pull out of storage my old Sony TA-4650 integrated amp. Plugged it in, connected the comnponents and it worked. the only problem was teh balance was a little scratchy but I fixed that. I hadn't used it muchover the last month so when I went to play some LP's last night, the speakers cut out. I heard teh relay cycle back on but the moment Iput the stylus down .. BANG! the speakers cut out. After some investigating, it seems that when I have anything plugged into the phono inputs but without playing an LP, there is a soft repeated thumping coming out of the speakers, especially one channel. If I increase teh volume .. BANG!, the speakers will cut out and the speaker relay will recycle again. This only happens with anything plugged into the phono inputs. the tuner and AUX inputs are fine. Now, I think I may have blown something because stupid me forgot the amp was on whrn I went to plug in another turntable and it made that typical sound that I don't think I have to explain. Did I possibly cooke the phono preamp?

How much did you sell THAT BEAUTIFUL Amp for

Hi one question did you service amps Where are you located? I have an amp for service?

Best restoration video I have seen. Everything done with so much love, attention and care. THANK YOU.

Hello, i own Sony-TA-N7B power amp and it's just incredible !!!

Spectacular work! What camera(s) do you use for your filming?

Dude are you related to that comedian Bill Hicks? I didn't think so.

Patience is one of the greatest virtues of life.

There's a great article on the 40th anniversary SONY VFET (art_sony_vfet_40yr.pdf) which if you scroll to the end you'll see a photo of a massive power amp!

I‘be got one of these on the shelf and never got to it. I will now! These new vids are great and by hitting the high points we get to see more of your work. Anyone who wants to get more detailed reviews of your approach to restoration can visit your earlier vids. Thanks for sharing. Cheers.