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Old 14th November 2013, 10:45 PM   #171
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Kevin,

That would be helpful if you write you findings.
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Old 15th November 2013, 12:30 AM   #172
kevinkr is offline kevinkr  United States
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Unfortunately I blew up my uTracer last night by shorting out the grid bias supply, just waiting for replacement parts to arrive from Mouser. I will trace the 6ж52п once I have repaired the unit and post the curves here.

One of the four tubes currently in my possession has a racked internal structure so the alignment of electrodes is suspect, the rest seem OK mechanically speaking.
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Old 16th November 2013, 05:23 PM   #173
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Default 6ж9п - Ia(Ug) @ Ua=Ug2=170V

Just measured this curve
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File Type: png 6?9?-1.png (18.3 KB, 142 views)
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Old 17th November 2013, 01:04 PM   #174
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Default 6ж52п - Ia(Ug) @ Ua=Ug2=170V

6ж52п triode strapped - measured
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Old 17th November 2013, 02:15 PM   #175
mogliaa is online now mogliaa  United Kingdom
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Hi there,
I did these traces some time ago and didn't have 6z52p at hand unfortunately. I had 6z51p amongst other pentodes that I traced in triode mode....
http://www.bartola.co.uk/valves/2013...n-triode-mode/

Ale
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Old 17th November 2013, 02:18 PM   #176
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Quote:
Originally Posted by mogliaa View Post
Hi there,
I did these traces some time ago and didn't have 6z52p at hand unfortunately. I had 6z51p amongst other pentodes that I traced in triode mode....
http://www.bartola.co.uk/valves/2013...n-triode-mode/

Ale
I have seen them on your website. I can send you one or two to measure if you like.
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Old 17th November 2013, 02:19 PM   #177
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Default 6ж52п - Ia(Ug) @ Ua=Ug2=170V & 143V

Quote:
Originally Posted by yagoolar View Post
6ж52п triode strapped - measured
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Old 17th November 2013, 02:25 PM   #178
mogliaa is online now mogliaa  United Kingdom
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I think I have 2 or 4 of them, if you can wait till next weekend I may find some time to fire up the uTracer and trace them. Not sure if it would be a representative plot given variance reported but worth trying!

Ale
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Old 17th November 2013, 03:34 PM   #179
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Combining results of yours and Kevin's on the same tool, I think the results will be good enough.
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Old 17th November 2013, 05:19 PM   #180
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Default 6ж52п - Ia(Ua) @ Ug2=(-4.0;0.0)

More curves from my manual Lamp tester P-508.
Solid black is polynomial approximation
Data below (1st col. is Ua value)
Ua\Ug -4,0 -3,5 -3,0 -2,5 -2,0 -1,5 -1,0 -0,5 0,0
329 0,60 1,55 4,00 9,40 19,50 36,00 64,00
298 0,33 0,82 2,25 5,60 14,00 26,00 54,00
264 0,18 0,42 1,15 3,28 9,38 21,40 36,00 52,50
235 0,10 0,20 0,60 1,75 5,40 14,50 28,00 44,00 62,00
206 0,05 0,10 0,27 0,82 2,82 9,40 22,30 36,00 54,00
176 0,03 0,05 0,14 0,35 1,33 5,20 15,50 29,00 44,00
146 0,00 0,02 0,07 0,15 0,53 2,50 9,80 22,00 36,00
116 0,00 0,02 0,04 0,07 0,20 0,95 5,00 14,50 28,00
105 0,00 0,00 0,02 0,05 0,14 0,60 3,68 11,50 25,00
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File Type: png 6?52?-Ia(Ua)@Ug=const.png (77.8 KB, 97 views)

Last edited by yagoolar; 17th November 2013 at 05:29 PM. Reason: Data added
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