Nutube

Questions générales... en particulier !

Re: Nutube

Postby escartefigue33 » Mon May 11, 2015 12:23 pm

IMG_1830[1].JPG


Un équivalent à vide de ce thyristor pour four à induction ?
1500A sous 2200V.... :mrgreen:
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Re: Nutube

Postby pprabi » Mon May 11, 2015 3:09 pm

@ Gérard:
101006284634.jpg
101006284634.jpg (38.21 KiB) Viewed 1377 times

231759518105.pdf
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@Philippe , justement c'était trop tranquille! :P

A+

Eric.
"Tous les mecs qui croient en Dieu, croient que c’est le seul. C’est même de là que vient l’erreur." Coluche
"Si un jour j'entends ce que je voulais entendre, la réalité sera moins belle que l'imagination..." Trad. BB King
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Re: Nutube

Postby escartefigue33 » Mon May 11, 2015 3:46 pm

Bon, t'as gagné...
Et ça donne quoi en SE ? :D :D
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Re: Nutube

Postby pprabi » Mon May 11, 2015 5:06 pm

J'essaierai plutôt d'abord en push! ;)

Eric.
"Tous les mecs qui croient en Dieu, croient que c’est le seul. C’est même de là que vient l’erreur." Coluche
"Si un jour j'entends ce que je voulais entendre, la réalité sera moins belle que l'imagination..." Trad. BB King
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Re: Nutube

Postby pierre26 » Mon May 11, 2015 5:37 pm

Moi j'vérai bien ça monté en grille-pain :lol:

Pierre
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Re: Nutube

Postby sébastien » Fri Mar 24, 2017 9:14 pm

Bonjour à tous,

Je relance cette discussion, car Kanéda vient d'utiliser ce tube pour la réalisation d'un préamplificateur:

http://blogs.yahoo.co.jp/hsgwhz/folder/ ... l?m=lc&p=1

En traduction:

"DC amplifier series No.251
First stage Korg 6P1, IVC type equalizer, SiC MOS-FET headphone amplifier installed, NiH battery power supply
Current transmission Nutube
Hybrid Preamp [Part 1] Akihiko Kaneda

It is a hybrid amplifier using Korg's triode 6P1.
Utilizing the characteristics of low power consumption, battery drive was adopted.

In the circuit configuration, the equalizer is the current mirror of the current mirror of 2SA995 at the 6P1 in the first stage, the current stage of the next stage is the current mirror of the 2SC 2291, and the equalizer element is driven by the push pull with the constant current load.
The last stage is the source follower of 2SK117BL.
The difference between this equalizer and the previous one is that the grid of the first stage pipe is grounded with a low resistance of 680 Ω. It seems to be a value determined by the balance with the variable range of SAOC.

Line amplifier & headphone amplifier are connected to the next stage of the equalizer. As a basic configuration, it is an inverting type IV conversion type variable gain amplifier. In the first stage, the direct current bias is applied to the cathode side of 6P1 at 1 s 1588 x 2, its output is received by the current mirror of 2 SA 995, converted to IV by resistance, and then connected to the 2 SJ 103 BL differential amplifier with the constant current of 2 SA 970 as the common source . The output of the differential amplifier is voltage converted at 3 kΩ and connected to the output stage of SiC MOS-FET SCT 2 H 12 NZ. Although it becomes a voltage output type as an amplifier, it is a current output with 1 kΩ. Take out the headphone output from the front of 1 kΩ.

Impressions

As a research on the circuit, there is a very interesting place, but when it is said whether there is necessity to use 6P1, it was not understood well to the extent that I read the first part. I am looking forward to the evaluation on the second part.
6P1 is a direct thermal type, device with low anode loss and difficult to use. It seems that the manufacturer's intention is also to use it as a device for making sounds, so this usage may be appropriate in that sense.

Next issue

Current Transmission Nutube Hybrid Preamplifier"


Au plaisir,

Sébastien
"Audio is engineering; music is art."

-Anonyme
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Re: Nutube

Postby jbert » Fri Apr 21, 2017 11:25 am

escartefigue33 wrote:
IMG_1830[1].JPG


Un équivalent à vide de ce thyristor pour four à induction ?
1500A sous 2200V.... :mrgreen:

Oui, ça s'appelle un thyratron et ça fonctionne diablement bien. J'en ai encore utilisé récemment : 1000A sous 20kV.

Sinon, vous comparez deux composants qui n'ont rien à voir. Le transistor possède un certain nombre d'avantages sur le tube. Mais le tube possède lui aussi quelques intérêts. Outre la charge d'espace, il sort en haute impédance et c'est cela qui est réellement intéressant. Il ne sert à rien de faire passer des ampères dans un tube (ou alors, on utilise des thyratrons et autres déclinaisons à gaz).
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Re: Nutube

Postby pprabi » Mon Apr 24, 2017 5:23 pm

Oui moi aussi, 5KA 40KV:

20160923_104010.jpg


A+
Eric.
"Tous les mecs qui croient en Dieu, croient que c’est le seul. C’est même de là que vient l’erreur." Coluche
"Si un jour j'entends ce que je voulais entendre, la réalité sera moins belle que l'imagination..." Trad. BB King
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