Jean Hiraga JH-50 Tube Amplifier Teardown, BEB #25, Röhrenverstärker

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Welcome to the Beautiful-Electronics-Blog, BEB.
Free teardown videos and education. No ads if you are a subscriber and watchin' within 48 hours after video has been released.
In this episode I will talk about amplifier technologies. You will see EL34 tubes from Electro Harmonix, 6SJ7 (6SJ7ST RCA), 6SN7 (6SN7EH Gold). And I will show you the beautiful JH-50 amplifier from inside of it aswell. Hope you enjoy it.
To all my german viewers: Did you like the easter egg in german language?
Jean Hiraga hat wirklich tolle Röhrenverstärker gebaut. Das Schaltungsdesign und der Klang sind überragend.
Please note: This is not an advertising. This amplifier is not for sale. Please do not ask.
LOL: "Use a transistor, go to jail" famous quote by upscale audio.

Опубликовано:

16 сен 2024

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Комментарии : 22

@DextersTechLab 8 лет назад

Great video Max and thanks for the mention!

@MaxKoschuh 8 лет назад

Thank you. You are always welcome! :-)

@henrikl1394 6 лет назад

Great sounding amp.

@MAYERMAKES 8 лет назад

...this video drives you towards becoming an audiophile... great introduction to the world of amps and I was not aware of the work of hiraga...now I need to do something with tube amps myself....

@MaxKoschuh 8 лет назад

Hi Clemens. Fun fact: I was once the largest second-hand hifi online seller in Austria. I am addicted to pure audio since a teenager.

@MAYERMAKES 8 лет назад

so why aren't you now? someone got bigger or the market smaller?

@MaxKoschuh 8 лет назад

my interests changed over the years. I was always fascinated by electronic teardowns since the age of 8. That's what I'm doing nowadays. But I'm still selling high end equipment now and then. Not focused on hifi anymore.

@ephone9664 7 лет назад

I had one wish i never sold it but it had to be repaired a few times.... a truly fantastic sound but was never built to be used in the UK with the higher mains voltage

@msylvain59 8 лет назад

Wow I could not spend so many time to edit my videos... Thanks for the referral to my channel !

@MaxKoschuh 8 лет назад

You are always welcome :-)

@oddballlw 8 лет назад

I love it!

@MaxKoschuh 8 лет назад

Thank you! :-)

@maxischerr 8 лет назад

I like the good old electronic stuff.

@MaxKoschuh 8 лет назад

yeah. absolutely.

@npdvvecchi7181 3 года назад

I inherited an old JH 50. I would like to change the valves. Any instructions or help available? Best. Nick

@frankgeeraerts6243 2 года назад

6SJ7 metal; or GT ...or 5693 red base....................these tubes may still be good !!! 6SN7 .........GT/GTA/GTB ......................;best with matched sections .............RCA/SYLVANIA or new production The original ones may also still be good ! EL34 ( matched pairs ) ......................nos is rare and very expensive.................new production you have the choice...... Don't forget to bias the output tubes.............and correct after burn in ..................

@npdvvecchi7181 2 года назад

@@frankgeeraerts6243 Thanks. The sound comes out of only one channel so I think it needs to be fixed. Is it worth fixing ?

@frankgeeraerts6243 2 года назад

@@npdvvecchi7181 As long as the transformers are OK , this amplifier is worth fixing !!!!!

@npdvvecchi7181 2 года назад

@@frankgeeraerts6243 Thanks for this. Is this kind of work expensive ? Approx idea ?

@frankgeeraerts6243 2 года назад

@@npdvvecchi7181 Normaly not as long as there are no expensive parts involved .....One channel works , that's reassuring ....be sure the OPT is allright ! Check voltages ......you have one good channel as a reference, tube may be faulty , resistor or a capacitor .......... Check for filaments glowing up on all tubes. Check fuses.........I think most likely one resistor may have burned out ..check. Check tubes .......If you're not customed to work with high voltages .........don't take any risk and look out for a good technician...