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GU50 plate curves
GU50 plate curves
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Old 4th June 2012, 05:36 PM   #1
Kay Pirinha is offline Kay Pirinha  Germany
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Default GU50 plate curves

Hi,

does anyone of you know a source of GU50 plate curves at a screen voltage of 300 volts? Any sheet of LS50, EL152 and GU50 itselves that I know only shows curves for 250 v screen voltage.

Thanks in advance!
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Old 4th June 2012, 08:14 PM   #2
Wavebourn is offline Wavebourn  United States
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GU50 plate curves
If I remember right LS-50 datasheet contains curves with different G2 voltages, so it can be extrapolated approximately.

It has G3 as well. Adding +10-30V on it works similarly, without fear of frying G2.
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Old 5th June 2012, 04:21 PM   #3
Kay Pirinha is offline Kay Pirinha  Germany
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Hi Wavebourn,

the one that I know sadly doesn't feature plate curves referencing to 300 v screen. But the plate curves herein at pages 2 (top) and p3 (bottom) respectively, surprisingly differ much!

I've also had a look at the EL153 curves, mainly the same tube, but lacking the supressor grid, but also there's none for 300 v screen.

Best regards!
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Old 5th June 2012, 07:03 PM   #4
Globulator is offline Globulator  United Kingdom
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The main problem I have with the GU50 datasheets is the Russian language. I guess Anodespannun is Max Anode voltage, but the rest is a bit of a mystery TBH - so I tend to build, measure, tweak - a bit like fumbling in the dark!

Compared to that the small signal stuff is easy
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Old 5th June 2012, 07:49 PM   #5
Kay Pirinha is offline Kay Pirinha  Germany
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I guess Anodenspannung is German and means anode/plate voltage !

Best regards!
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Old 6th June 2012, 02:06 AM   #6
jazbo8 is offline jazbo8
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GU50 plate curves
Quote:
Originally Posted by Kay Pirinha View Post
Hi Wavebourn,

the one that I know sadly doesn't feature plate curves referencing to 300 v screen. But the plate curves herein at pages 2 (top) and p3 (bottom) respectively, surprisingly differ much!

I've also had a look at the EL153 curves, mainly the same tube, but lacking the supressor grid, but also there's none for 300 v screen.

Best regards!
I thought EL152 is the civilian version? See if this one make sense.

Click the image to open in full size.

Jaz
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Old 7th June 2012, 11:42 AM   #7
Kay Pirinha is offline Kay Pirinha  Germany
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Thanks. I know this sheet. At page 9 we find suitable data for audio frequency amplification, but it doesn't show the requested plate curves @300v screen. Those at p.3 relate to 250 v screen.

Best regards!
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Old 9th June 2012, 09:39 AM   #8
Alphy is offline Alphy
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Check this thread:
http://www.diyaudio.com/forums/tubes...eet-peach.html

There's also some other threads on the GU50 with data, mostly supplied by Wavebourn, who's an expert.
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Old 9th June 2012, 06:59 PM   #9
costis_n is offline costis_n  Greece
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Quote:
Originally Posted by Kay Pirinha View Post
Thanks. I know this sheet. At page 9 we find suitable data for audio frequency amplification, but it doesn't show the requested plate curves @300v screen. Those at p.3 relate to 250 v screen.

Best regards!
In all GU50 datasheets only 250V G2 operation is mentioned. So this means you have to extrapolate them (make them up )

Bilingual datasheet here. Seems like they wanted to make monies off potential enemy, too

http://tubedata.milbert.com/sheets/018/g/GU50.pdf
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Old 9th June 2012, 07:17 PM   #10
Wavebourn is offline Wavebourn  United States
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GU50 plate curves
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Originally Posted by costis_n View Post
Bilingual datasheet here. Seems like they wanted to make monies off potential enemy, too

http://tubedata.milbert.com/sheets/018/g/GU50.pdf
PDF format did not exist during Cold War.
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