Alert on 6C33 Bias x Hi-Fi Amps Use

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FullRangeMan

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #20 on: 18 May 2020, 10:45 pm »
What sound improvment I would expect from 600 to 1K Ω ?
« Last Edit: 19 May 2020, 01:37 am by FullRangeMan »

E55l2

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #21 on: 19 May 2020, 11:38 am »
What sound improvment I would expect from 600 to 1K Ω ?

More cleaner and tighter sound. All depends of your speaker ofcourse.

FullRangeMan

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #22 on: 19 May 2020, 10:22 pm »
Thanks its interesting, I though the amps should delevery less power.

E55l2

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #23 on: 20 May 2020, 07:54 am »
Thanks its interesting, I though the amps should delevery less power.

With lower Ra the power of the tube increases but the low frequency power of the transformer decrease because of limitations of the flux inside the transformer.

FullRangeMan

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #24 on: 20 May 2020, 11:34 pm »
Do you think the 6C42 Ra=60Ω are suited to audio ?

E55l2

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #25 on: 21 May 2020, 09:40 am »
Do you think the 6C42 Ra=60Ω are suited to audio ?

You have any datasheets of this tube?

FullRangeMan

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #26 on: 21 May 2020, 11:04 pm »
No just this image:

E55l2

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #27 on: 22 May 2020, 06:03 pm »
No just this image:


Sorry, can't help you with that. But if you know all the data, i can make a transformer for that :lol:

FullRangeMan

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #28 on: 23 May 2020, 12:23 am »
I had never see this tube for sale, my supplier at GSTubes also never had it avaliable. I know it has three cathodes so looks more prone to variance than the 33.

E55l2

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #29 on: 25 May 2020, 06:48 pm »
I had never see this tube for sale, my supplier at GSTubes also never had it avaliable. I know it has three cathodes so looks more prone to variance than the 33.

No data, so it can be a proto type, if you have many this could be intersting to make a amplifier but if you have just 1 or a couple it is better for a museum. Remember, if you have a tube with datasheets then a tranfsormer can be made.

FullRangeMan

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #30 on: 26 May 2020, 12:06 am »
No data, so it can be a proto type, if you have many this could be intersting to make a amplifier but if you have just 1 or a couple it is better for a museum. Remember, if you have a tube with datasheets then a tranfsormer can be made.
The 6C42 are a regular military tube to V regulation as the 33, but by some reason it is rare in the audio shops in Russia, maybe it is classified yet.

E55l2

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #31 on: 27 May 2020, 05:56 pm »
The 6C42 are a regular military tube to V regulation as the 33, but by some reason it is rare in the audio shops in Russia, maybe it is classified yet.

So if your supplier has none for sale, and there are no datasheets and they are "regular" military..... what is going on? how did you get it and how many?
And can you make better photo's from the tube?

FullRangeMan

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #32 on: 27 May 2020, 10:13 pm »
So if your supplier has none for sale, and there are no datasheets and they are "regular" military..... what is going on? how did you get it and how many?
And can you make better photo's from the tube?
I dont have any 6C42, just get this image from a French guy in YT, but seems other modern big tubes are better and simpler as GU72.

E55l2

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #33 on: 28 May 2020, 08:51 pm »
I dont have any 6C42, just get this image from a French guy in YT, but seems other modern big tubes are better and simpler as GU72.

What you mean with "better and simpler as a GU72" .  I looked at the datasheet of the GU72 and it looks as a remarkable tube. Although  not a triode it could be work fine in triode mode......

FullRangeMan

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #34 on: 28 May 2020, 11:52 pm »
What you mean with "better and simpler as a GU72" .  I looked at the datasheet of the GU72 and it looks as a remarkable tube. Although  not a triode it could be work fine in triode mode......
The 6C42 is a complex tube with 3 cothodes.
We had a member that owned the Gogo Audio brand he made amps with GU72 and GMI11.

E55l2

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #35 on: Yesterday at 06:15 am »
The 6C42 is a complex tube with 3 cothodes.
We had a member that owned the Gogo Audio brand he made amps with GU72 and GMI11.

Are there any triode mode datasheets of these tubes?

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #36 on: Yesterday at 06:29 am »
Are there any triode mode datasheets of these tubes?
I think the 6C42 being a 7 pin and big brother from the 33 is a Triode too, not a Tetrode.

E55l2

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Re: Alert on 6C33 Bias x Hi-Fi Amps Use
« Reply #37 on: Yesterday at 07:18 pm »
I think the 6C42 being a 7 pin and big brother from the 33 is a Triode too, not a Tetrode.

Sorry my mistake, the 6c42 is not so intersting because it's not avaiable.
I mean are there triode mode curves from the gu72? and the gmi 11

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