hello i just got 2 gz shuguang gold rectifiers im about to compare an old one to see if i can hear a difference but im told they are rugged im using them for a guitar amp so seeing this post interested me.but ive got no equipment to try this sort of thing out or much knowledge i just trust my ears & analogue is king great post mate peace....
I have a Full Music Mesh plate/grid 300b tube. Working fine, not many hours and then one day I turned on the amp and nothing. Very disappointing. The mesh plates are nice sounding and look wonderful.
Hi, thanks for your comment on my video. I have never tried it so I don't have any idea about it. But regular tubes have excellent electrical spec and capabilities to reproduce right sound. This is all I can say. Have a great day. Young
Wonder if this would work on a "Zombie" tube where I accidentally did something similar: heater was at 9V for less than a second. Stupid I know but visible light emission is very low compared to another identical tube under same bias etc. I did hear that emissive coating damage is supposed to be irreversible but maybe not, plan is to try a variant of this where negative voltage is applied with tube at +170 Celsius so the coating is persuaded to re-coat the now cold heater by a variant of sputtering as this is essentially how it was applied at the factory. Might work on age weakened VFDs as well which would be excellent!
Am I the only one who thinks that TV7 box looks amazing? All the analog dials and buttons. Young, have you considered making an analog, modular, synth?
Hi, great video. I have a custom 12 X 6550 (kt88) amp that red played all its output valves very quickly. The amp was turned off very very quickly, I turned down the bias pot and tried again. Although not going into red plate again, the power output was much less. The valves were all with less than 24 hours use. I suspect a capacitor. I am wondering if I might need to go through your process. I don't want to buy 12 new matched valves! I'm hoping the valves weren't taken too far and can be salvaged!
it is a regulated power supply, in this case it gives a voltage of 5.3 volt to the filament of the tube and the filament withdraw a current of 1.3 amperes
Excellent video ! Can you give a little more details on how is this working and what are the perfect voltage conditions for heating and time (I saw you put a little bit more than the normal value, aswell for the 45's you also rejuvenated). Thank you for the sharing of this excellent knowledge !! Now I know that I won't ever throw a "bad" tube anymore !
good afternoon dear Fernando. Thanks for your comment. It depends on. If a tube is in good condition with just simple emission issue, it takes 3~5 hours is OK. But some tubes which were used for long time with overload, it takes 24 hours or more. Sometimes it is a small amount of improvement only. voltage is same as the original spec. Have a great day. Young
Wow, I’m very surprised that works! It would seem like while you’re stripping your heaters you’re building a layer on your cathode, AKA cathode poisoning. I wonder if there is a way to heat the tube to fix this rather than apply heater voltage that long. I suppose if a tube is dead, one is less concerned with shortening its life🙃.
Dear Mr. Ahn: I have a question; years ago, 1 of KT88 burnt out , among 4 tubes in my amplifier, the tube it burnt, the element lighting up abnormally, just like fire, I turned offy amplifier immediately. Would that burnt tube burn out the amplifier and speaker too? Looking forward to your advice🙏
happy new year dear James. It does not damage your amp or speakers because OPT blocks DC. If an OPT has insulation issue, it's another story. I like James Wood, a famous movie star
What do you mean by "burning filament for 2 hours"...? 3:23 How do you "burn" a filament...? How much voltage are you putting across the filament...? How does this give a tube back it's life...?
저의 채널 구독해 주셔서 감사드립니다. 동일합니다. 제가 가장 최근에 올린 45에 관한 영상도 보셨을텐데요, 2개중에 한개는 거의 기준치 안으로 회복되었습니다(거의 이틀동안 달궜슴), 하지만 다른 한개는 몇일을 달궈도 잘 회복되지 않았습니다(40프로에서 60프로). 반면에 슈광 2A3는 에미션이 완전히 감퇴되었었는데(TV-7에서 0) 원래수준으로 빠르게 회복되었습니다. 한번 시도해보세요. 그럼, 다음에 뵈요. 세영
It's because of high plate current caused by 0 bias(short circuit between filament ~ GND). No plate current at all after my mistake however the 300b tube was revitalized by supplying 5V for more than 10 hours. This method eliminates invisible gas layer which are concentrated on filament. watch my video again, you can save lots of money
The tube was damaged. It was NOT a tube that lost it's ability to conduct from old age. You cannot revitalize a vacuum tube unless you disassemble it, replace the filament (or cathode if equipped), put in a new getter material, and then re-vacuum, seal, and initialize the getter to remove unwanted gases.
email ありがとうございます。私は 趣味で アンプ 作っています。そしてaustraliaでわはんばいできないです。そして運送りょきんもダイヘン高いので米国のぞいてはばんばいするのは難しといえます。If you are serious on my product, please let me know the model number. I will do my best sir. Thanks for your interest. Have a great day. Best regards. Young
@@YoungAhn Youngさんの日本語分かります。色々な言葉ができてすごいですね。240Ⅴの製品を作るのは簡単ではないのですね？希望は100Vと240Vがスイッチで変換出来る物です。120Vでしか作れない場合には変圧器を使います。ケースはWoodを希望。SP302WWにt着いているbias test meter : easy to test tube conditionがとても気に入っています。Youngさんが作っている多くの商品が欲しいですが今は一つしか買えません。色々と考えて頭がいたいです。色々考えてまたご連絡します。 運送の事は解決しました。もし商品を注文したらアメリカに送ってもらいます。
Subscribed! This reminds me of rejuvenating TV picture tubes back in the day
😃 thank you very much. Young
Those string just buzzing like the breeze. Exquisite taste
Hi sir, thank you for your comment on my video. Have a great day
Very interesting! I love the old tube tester.
this man has some serious gear and skills!!
Skills? What he did really doesn't take much skill at all.
hello i just got 2 gz shuguang gold rectifiers im about to compare an old one to see if i can hear a difference but im told they are rugged im using them for a guitar amp so seeing this post interested me.but ive got no equipment to try this sort of thing out or much knowledge i just trust my ears & analogue is king great post mate peace....
Thank you such a great video I would like you to explain as you go when winding transformers your English is very good thank you again
Thank you very much for your comment n I will try, seems like a little improved than before. Good day sir
Amigo na minha opinião o som dos amplificadores valvulado é o melhor som que existe. Abraço
Rio de Janeiro Brazil
Gracias
Wow. Gotta try it on my 813 that arced over during tesla coil use.
Thanks
I have a Full Music Mesh plate/grid 300b tube. Working fine, not many hours and then one day I turned on the amp and nothing. Very disappointing. The mesh plates are nice sounding and look wonderful.
Hi, thanks for your comment on my video. I have never tried it so I don't have any idea about it. But regular tubes have excellent electrical spec and capabilities to reproduce right sound. This is all I can say. Have a great day. Young
A valuable lesson. Thank-you.
Thank you for your interest.
Nice! Videos are well done . Love the music
Good evening dear Doug, Thank you very much, I will do my best. Young
after you complete your process might i suggest that you reflash the getter in the tube.in some cases this may be helpful.
physics is physics, thanks dear Gizmo for leaving a comment on my video
Amzing video and knowledge! Thanks for sharing!
My pleasure!
Wonder if this would work on a "Zombie" tube where I accidentally did something similar: heater was at 9V for less than a second. Stupid I know but visible light emission is very low compared to another identical tube under same bias etc. I did hear that emissive coating damage is supposed to be irreversible but maybe not, plan is to try a variant of this where negative voltage is applied with tube at +170 Celsius so the coating is persuaded to re-coat the now cold heater by a variant of sputtering as this is essentially how it was applied at the factory. Might work on age weakened VFDs as well which would be excellent!
I had a Technics floor speaker like that, and it sounded surprisingly very good.
Am I the only one who thinks that TV7 box looks amazing? All the analog dials and buttons.
Young, have you considered making an analog, modular, synth?
Hi sir, Thank you for watching my videos, I haven't finish my goal yet. Thank you very much
Great video - thank you!
Hi, great video. I have a custom 12 X 6550 (kt88) amp that red played all its output valves very quickly. The amp was turned off very very quickly, I turned down the bias pot and tried again. Although not going into red plate again, the power output was much less. The valves were all with less than 24 hours use. I suspect a capacitor. I am wondering if I might need to go through your process. I don't want to buy 12 new matched valves! I'm hoping the valves weren't taken too far and can be salvaged!
It's very easy to repair tube amps, it's not capacitor problem. Contact your local tech. Thanks
Excellent! Thank you...
Glad you liked it! Thanks
@3:41 Is that box of cupcakes a precision test instrument? If so......... please explain how they work😉
it is a regulated power supply, in this case it gives a voltage of 5.3 volt to the filament of the tube and the filament withdraw a current of 1.3 amperes
Is this any different than leaving tubes in your guitar amplifiers with the standby switch on - so only the heaters are getting voltage?
When standby sw is off, high voltage is not supplied to pltate. Only filaments are turned on. Thanks
@@YoungAhn yes, is this enough to accomplish this task?
Excellent video ! Can you give a little more details on how is this working and what are the perfect voltage conditions for heating and time (I saw you put a little bit more than the normal value, aswell for the 45's you also rejuvenated).
Thank you for the sharing of this excellent knowledge !! Now I know that I won't ever throw a "bad" tube anymore !
good afternoon dear Fernando. Thanks for your comment. It depends on. If a tube is in good condition with just simple emission issue, it takes 3~5 hours is OK. But some tubes which were used for long time with overload, it takes 24 hours or more. Sometimes it is a small amount of improvement only. voltage is same as the original spec. Have a great day. Young
I am so jealous, you can make your own tube amps how I wish someone will build for me.
Sorry, I don't build amps for me. I spent more than 10 years with lots of tears, sweat and fund. email me when you are ready. Good day 😃 Young
Can you tell me how to find out what tube I have , when the writing is erased off the tube?
use tube tester. Thanks
Wow, I’m very surprised that works! It would seem like while you’re stripping your heaters you’re building a layer on your cathode, AKA cathode poisoning. I wonder if there is a way to heat the tube to fix this rather than apply heater voltage that long. I suppose if a tube is dead, one is less concerned with shortening its life🙃.
thank u !
@Teknogod17 yeah no idea really, but its pretty amazing
Dear Mr. Ahn:
I have a question; years ago, 1 of KT88 burnt out , among 4 tubes in my amplifier, the tube it burnt, the element lighting up abnormally, just like fire, I turned offy amplifier immediately.
Would that burnt tube burn out the amplifier and speaker too?
Looking forward to your advice🙏
happy new year dear James. It does not damage your amp or speakers because OPT blocks DC. If an OPT has insulation issue, it's another story. I like James Wood, a famous movie star
@@YoungAhn
Mr Ahn
Understand. Thanks for your professional advice.
Happy New Year.
어떻게 툽을 살릴수가 있지요. 신기하네요.
What do you mean by "burning filament for 2 hours"...? 3:23 How do you "burn" a filament...? How much voltage are you putting across the filament...? How does this give a tube back it's life...?
Hi, thanks for your comment. We need a power supply.
Hi, I can’t clearly see how you have revitalised the valve 2.
Hi, thanks for watching my videos. please watch it again with your concentration. Good day. Young
Thankyou sir
Thank u for visiting my channel. See you again soon sir
좋은 정보 감사 합니다. 45 튜브도 같은 방법으로 재생할수 있는지요?
저의 채널 구독해 주셔서 감사드립니다. 동일합니다. 제가 가장 최근에 올린 45에 관한 영상도 보셨을텐데요, 2개중에 한개는 거의 기준치 안으로 회복되었습니다(거의 이틀동안 달궜슴), 하지만 다른 한개는 몇일을 달궈도 잘 회복되지 않았습니다(40프로에서 60프로). 반면에 슈광 2A3는 에미션이 완전히 감퇴되었었는데(TV-7에서 0) 원래수준으로 빠르게 회복되었습니다. 한번 시도해보세요. 그럼, 다음에 뵈요. 세영
Is there any way to rebuild 4-400 ....?
Hi, I'd like to translate the word "rebuild" as "revitalize". I think so, just try sir. Thanks for your comment.
What was the problem though? Did the intense heat of the short change the structure of the metal in the filament? Was this an annealing process?
Hi there. Did you watch this video from the beginning to the end? It's not an annealing process.
Young Ahn Yes I did. But I did not hear you say what the actual problem was.
It's because of high plate current caused by 0 bias(short circuit between filament ~ GND). No plate current at all after my mistake however the 300b tube was revitalized by supplying 5V for more than 10 hours. This method eliminates invisible gas layer which are concentrated on filament. watch my video again, you can save lots of money
Young Ahn we missed the invisible gas later explanation
Excellent
Thank you so much 😀
awesome thanks
Thank you for your comment. Have a great Sunday
The tube was damaged. It was NOT a tube that lost it's ability to conduct from old age. You cannot revitalize a vacuum tube unless you disassemble it, replace the filament (or cathode if equipped), put in a new getter material, and then re-vacuum, seal, and initialize the getter to remove unwanted gases.
shmapp.ca/how-to-restore-picture-tube-without-using-a-crt-tester-restorer-or-rejuvenator/
Can this be done with 6l6gc tubes? What voltage and amps would be used?
Hi, direct heated tubes(300b, 2a3 ~~} are much better for this experiment. 6.3V ac or dc. Good luck. Thank you
歩いても、歩いても。。。。
Tube life is determined but the coating on there cathode and can not be regenerated when gone next
Thank you for your great comment. Yes, I do it again and again whenever emission is reduced.
ok not a tech guy what did you use to recharge your tubes
Power supply. Thanks
初めまして、オーストラリアからTH-cam 見させていただいています。Fluxionの商品はオーストラリアからですとどの様にしたら購入できますでしょうか？
email ありがとうございます。私は 趣味で アンプ 作っています。そしてaustraliaでわはんばいできないです。そして運送りょきんもダイヘン高いので米国のぞいてはばんばいするのは難しといえます。If you are serious on my product, please let me know the model number. I will do my best sir. Thanks for your interest. Have a great day. Best regards. Young
Youngさん、お返事有難うございます。おっしゃる通りです。カナダからですとアンプは重たいので運送代が高いと思いますが色々と方法を調べてみます。
もう一つの問題は一回の購入する商品の価格がA$1000を超えない事です。これを超えると関税がかかってしまうからです。もしこの先Yungさんの商品を購入するときには工夫が必要と思います。
現在私のAudio機械の使い方はDAC - PreAMP(Tube) - Audiolab(8300xp) Power AMP - Speakerで聞いています。Power AMPをTubeに替えるか、pre main AMPで楽しむか考えています。
roger roger Mitsuguさん, わかりました。もう一つ問題は240Ⅴの製品は準備されていません。もｔぱら120Ⅴのアンプだけです。ひさしぶりに日本語するのがダイヘンむじゅかしいですね。1984年から習いましだ。いつまでもご質問あればemailぐダサい。Thanks. Young
@@YoungAhn Youngさんの日本語分かります。色々な言葉ができてすごいですね。240Ⅴの製品を作るのは簡単ではないのですね？希望は100Vと240Vがスイッチで変換出来る物です。120Vでしか作れない場合には変圧器を使います。ケースはWoodを希望。SP302WWにt着いているbias test meter : easy to test tube conditionがとても気に入っています。Youngさんが作っている多くの商品が欲しいですが今は一つしか買えません。色々と考えて頭がいたいです。色々考えてまたご連絡します。
運送の事は解決しました。もし商品を注文したらアメリカに送ってもらいます。
聞いている曲は色々な曲を聞きますがジャズが多いです。1920〜の曲です。日本語が大変でしたら英語で返信してください。Please reply in English If Japanese is difficult,
take that russiA
이분 얘기하는거 별 도움이 안됩니다. 혼자 얘기하다 맙니다.
아주 오랫만에 안티 댓글 받아봅니다. 너덜너덜한, 아니면 싸구려 물건 소개하는 분들에게는 이런 댓글 쓰시기 어렵겠지만 여기서는 가능합니다. 생활이 힘들어도 잘 극복하시기 바랍니다. 저의 영상 시청 감사드립니다.