Restoration class H professional power amplifier // Restore huge sound amplifier 

I was employed as a commercial audio technician for several years. There are many repair/restoration methods that I would love to help this guy with. Nevertheless, I give my admiration for his effort and willingness to expose himself to the scrutiny of the world of repair technicians. The honest truth: we can ALL learn something from every technician out there! 😊 Keep the comments coming. 👍

His dexterity manouvering that honking great soldering gun into tight spaces without melting everything in sight was impressive!! He's obviously done many of these rebuilds so knows what typically fails and measurements to expect. That allows rapid progress without going down false rabbit holes.

I'm glad I no longer need to do commercial repair work. I like to take my time and make everything pretty instead of hustling to get the maximum amount of work turned out in a day. Now I just build or repair for myself. So I take my time, thoroughly clean everything, bend all the leads perfectly, and solder everything so it's not just functional, but pretty. Everything looks and sounds the same on the outside, but everything looks really nice, better than new on the inside, and I know it. The electrons don't care, but I do.

A OUI BRAVO CE LA REPARASOIN SA PEIUE BIEN ICI ON CE DE BOURIY PAS ME ME SA PEUY PA BIEN MRCI

só um profissional capacitado para realizar esse tipo de serviço. Parabéns!!!

Maravilhoso trabalho do começo ao fim!!!!!!!!!!

Parabéns! Que restauração top! Dá gosto de ver! Excelente AMP.

bütün parçalarını nerdeyse değiştirdin ya helal olsun tebrik ederim

Bạn này ở VN, thấy sài keo 502 với ổ căm LIOA, bạn làm rất chuyên nghiệp ngưỡng mộ bạn

Глобально и очень обстоятельно!!! Респект!!!

Bạn làm rất gọn gàng và chính xác cao.

HI 👋🤠 guys; I have repaired electonic equipment since 1970, And Trust me, The Crest amp WILL give you about 1000

If finish it will be unreliable in actual use.look at the solder,remember this a high power amplifier it operates at a high current high voltage even in just half power operation.

Te felicito por esa buena reparación, saludos cordiales, México.

Great amps for running PA subwoofers.

Усилитель был рабочий.

Muy buena la reparación quedo como nuevo mis respeto

Парень, да ты весь усилитель по новой собрал! Молодец!

BONJOUR VOUS ETES UN GRAND MAGICIEN

Mis respetos hermano por tu inteligencia y pasciencia! Dios te bendiga mucho te mando un abrazo desde Monterrey México departe de Fredy Amézquita!

Looks like fun - wish there was explanation about why and what is going on

🇧🇩🇧🇩 Very nice 👍👍

Show que perfeiçăo esse deu ttabalho mais uma maquina de guerra a vida ❤❤❤❤❤❤

Saya tertarik sama power power nya..

Espectacular reparación! Felicidades!

- "Какие замеры ты делаешь ?" - "Да от балды тестером везде тыкаю в разных режимах .. Зачем мне замеры ..."

Kudos to all the engineers who designed this amplifier, this isn't lego!

Hadir nyimak salam santun power nya mantap 👍

I am memorised watching you work my friend.

Thợ giỏi thế.👍

Very good repair, you must have some ingenuity to fix it

It certainly looks good.

Great recovery ❤

professional work, you are a genius

Thats not a genuine Crest Audio amplifier.... Genuine Crest Audio amplifiers are made in the USA, and they dont make a CA20 model.... Can clearly see by the internals, that its a chinese fake copy amp... (ive worked on MANY genuine Crest Audio amps over the years, So know the internals very well)

Currently own a Crest 90001. Wish l could have it restored like this. Jolly good job lad👍👍

Boa noite a todos fi cou zerada parabéns muito proficional

Is it a kapton tape between transistors and coolers? Washers should have very low thermal resistance, so kapton tape shouldn't be used here. Those old white/transparent washers were better than kapton. Even mica washers will be better.

QUE MARAVILLA,¡ ES UNA DON¡¡¡¡

You are the best enginering

Mantap oom

Самое главное стрелочный тестер купить. И любые ремонты по плечу :)

Perfeito ótimo trabalho

As a person whom restores vintge hi fi for a hobby, ive never in my life seen anyone test equipment so randomly. I strongly reccomend anyone watching this video or others like it NOT to tey this sort of repair. It is dangerous and those big capacitors if not disscharged can give you a nasty shock and then theres dealing with high voltage. And all those caps would have been worth replacing.

❤🎉xelent work bro🎉🎉

I wish that there was some running commentary so we can understand the thought process especially on fault finding

کارت خیلی زیبا و قشنگ بود خوشم اومد

Amplificador profissional 😉

Congratulations .. very good , excelent you work ..

Gosto muito desses conteúdos sou técnico

Ремонт дороже усилителя. Моё почтение.

a eletrõnica é muito top.... principalmente o trabalho de quem as pratica .... parabéns

exelente

Nice video, thanks :)

belíssimo trabalho parabéns ❤❤❤

Xem đã quá ad ơi ad làm nhiều ca nặng như vậy nhé

Great work sir.

did those caps you cleaned up leak?ive never seen caps with 4 prongs except on HVAC systems

Thats some knowledge 👍👍

我认为风扇前面的那些框架应该装有空气过滤器。就像薄泡沫空气过滤器一样。做得好。

turning on the amplifier without dismantling it and inspecting it first is an error which risks further damaging the device

Así quiero un técnico sercas de mi domicilio felicidades y de dónde es usted? Yo soy de Monterrey NL México . gracias por compartir

Very nice work. God old reliable stuff, even nearly noone uses these old Power amps anymore. New Speakers usually come with build in Class D amps unless it's really big PA Systems, and much of it is junk unless you have the money for the good stuff. Can't imagine breaking my back on carrying Stuff like this around anymore🙃

Parabéns!

the audio is cool

Nice job

Super super super ❤❤❤❤❤

喜欢你的视频

Qué líquido o solvente utiliza para limpiar el circuito impreso

aos 35:34 ...amigo você testou dois NTC diretamente na placa ,eles estão ligados em paralelo ?????? bom trabalho ,eu gostaria de ter seu tempo e sua paciência PARABENS !!!

Same next video plz

А вообще не плохо,зная базу элементов электроники…как говорят «на глаз»

One thing for sure, he is not a painter. Change all the caps, not just the faulty ones.

I like this work I'm in Chennai I'm very interested in electronics work Please give me the job and work

ok quá chuẩn

Seriously??? Fixing electronics with a soldering gun??!

Vai tumer video onek Valo lagi

With the simplest means we repaired a functional device again, all respect for this good work. When I consider the effort that goes into repairing electronic devices here in the country, I'm surprised that you're successful with this complex repair with this amplifier.

That paint gun seems to have to much air pressure and the drop size too small.

Please, would someone buy this guy a good Weller pencil-tip soldering station? That soldering gun is great for some things, but looks brutal on the smaller components and the circuit boards.

4080 next video plz

What a tiny transformer...;-)

You Sir are a magician. I admire your work. I'm also a repair technician and this is a hard repair. You got to have good knowledge and skills to do this. Keep the great work, Cheers!

im watching and like ❤

Руководство по ремонту усилителей) разбираете с умным видом на составные части, тычете наугад тестером, паяльником, собираете соблюдая асмр и - профит, если не заработало значит вид был не слишком умным)

Great work bro

Waouh c'est ça j'aime ça

СМОТРЮ МНОГО ПО ВОССТАНОВЛЕНИЮ В ЭТОМ ГАРАЖЕ, А ГДЕ БЕРЁТЕ ЗАПЧАСТИ?

Big badass amp Noice 👌

Nice broo...

Great video- CREST product just don't failed from American Made. But for China Made- CREST, they're out of business. The late 1980, CREST- C20 was American Made. They never fail. They cost- arm and leg to owning sets. Daddy Junky Music was the place in late 1980 for local purchased CREST Products. But later year, CREST made in China, not durable, not lasting- disappointed. That was why they out of business- perhaps Peavey Electronics bought CREST in the late 1999. American companies- many of them Made Series Mistake with advance technologies shipped overseas for low cost productions and higher profits, but that destroyed Quality and Reliability.

As always, very well done.

Buat saya aja bang lumayan 😂

Ini pinter sekali

Good job

Удивило что завернули на место всё коррозионные винты которые стояли в усилителе до ремонта. А ведь это копеечные детали. Такая задумка? Или небрежность? Непонятно.

Awesome!!!

vielleicht sollte ihm mal zeigen wie man lackiert 😉

good job 👍

Good good