GU50 plate curves

[Kay Pirinha]

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!

 

[Wavebourn]

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.

 

[Kay Pirinha]

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!

 

[Globulator]

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

 

[Kay Pirinha]

I guess Anodenspannung is German and means anode/plate voltage !

Best regards!

 

[jazbo8]

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.

An externally hosted image should be here but it was not working when we last tested it.

Jaz

 

[Kay Pirinha]

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!

 

[Alphy]

Check this thread:
http://www.diyaudio.com/forums/tubes-valves/163459-trying-make-sense-sweet-peach.html

There's also some other threads on the GU50 with data, mostly supplied by Wavebourn, who's an expert.

 

[costis_n]

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

 

[Wavebourn]

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.

 

[costis_n]

PDF format did not exist during Cold War.

So, is it the Ukrainians post 90's that made the translation, to sell them easier to HAM's? In any case a fascinating part of history.

 

[tuberanger]

GU50 plate curves Vsg=300V

Hi,

if it is still of any interest... here you are!