Datasheet for Russian 6p3s-e - Page 2 - diyAudio
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Old 24th September 2008, 04:16 AM   #11
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Quote:
Originally posted by Ty_Bower
@Wavebourn

I wondered why you had taken such an interest in this thread. I just followed the link to your web page, and looked at your Pyramid amplifier. You are no stranger to this particular tube, are you? Nice looking amplifier, by the way.
Thanks!
I am also no stranger to all Russian tubes, resistors, capacitors, transistors, ICs, etc... ; when I was a kid we had a Russian shortwave tube radio. All my neighbours had Russian radios, and all relatives, all had Russian radios with Russian tubes only.
...because it was in Siberia.

Here is Pyramid in darkness.

Click the image to open in full size.

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Old 24th September 2008, 04:37 AM   #12
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They are very pretty tubes. I especially like the large grid alignment holes in the plate.

Click the image to open in full size.
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Old 24th September 2008, 10:53 PM   #13
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Quote:
Originally posted by Ty_Bower
They are very pretty tubes. I especially like the large grid alignment holes in the plate.

Click the image to open in full size.
Nice!

Did you increase cathode resistors?

Swan's song is nice, but short...
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Old 25th September 2008, 03:27 AM   #14
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I have some different datasheet as Ty_Bower.
As interested open new 6P3S-E box with paper))
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Old 25th September 2008, 08:24 AM   #15
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At the risk of stating the obvious....


the 6P3S and 6P3S-E are incorrectly sold and used as 6l6gC
They are 6l6g, in terms of anode dissipation.

Please email for datasheet of 6p3s-e
(could not attach it, it is >8mB)
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Old 25th September 2008, 09:56 PM   #16
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I have a question... Isn't the tube in the picture with the small base the tube that's sold as the Russian 5881 by New Sensor/Sovtek and everyone else. I always thought that the Russian "6L6" to watch out for had a standard size base but a rather small envelope and internals. This tube was sold by Groove Tubes for a while as their 6V6HD. It was a VERY low performing tube if used in place of a 6L6GC and tended to blow up rather easily along with being tough to bias. That "5881" is a very good tube and I think I've only seen one failure ever. They don't sound all that great but they last a long time in a guitar amp.
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Old 26th September 2008, 12:11 AM   #17
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Quote:
Originally posted by DaveMcLain
I have a question... Isn't the tube in the picture with the small base the tube that's sold as the Russian 5881 by New Sensor/Sovtek and everyone else. I always thought that the Russian "6L6" to watch out for had a standard size base but a rather small envelope and internals. This tube was sold by Groove Tubes for a while as their 6V6HD. It was a VERY low performing tube if used in place of a 6L6GC and tended to blow up rather easily along with being tough to bias. That "5881" is a very good tube and I think I've only seen one failure ever. They don't sound all that great but they last a long time in a guitar amp.
The answer is above, in post #3: http://www.diyaudio.com/forums/showt...91#post1616491

When I worked as a senior staff engineer in railway electronics and communications' support in Soviet Union, we used such tubes in relay stations for multichannel SSB voice transmission over long lines. They performed well and had a long life when used in modes specified by the manufacturer.
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Old 26th September 2008, 01:30 AM   #18
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Quote:
Originally posted by Ty_Bower
They are very pretty tubes. I especially like the large grid alignment holes in the plate.
Interesting, is that what the holes were really put there for?

I got Chinese 6L6-GCR with straight glass no bigger diameter than
the octal base. Only the top mica is supported against the interior
of the glass, the bottom sits on enough wires I guess its stable...

Two getters on either side, near the base, standard octal base.
But the base is only populated with 6 pins...

There's also a small set of wings above the top mica that appear
to be a radiant heatsink for G1. There is no similar sink for G2.

Anyways, there don't seem to be any holes at all in this 6L6's plate.
You can look under or over the plate and see the grids are aligned,
there is about a few mm gap between the plate and the micas...
The plate appears to be self supporting, there are no rods up the
sides like in your pictures. Only the grids seem to have rods...

If I was looking in the bulge on the side (where the holes seem to
be missing), I would be seeing only the beam forming plate anyway.
The anode plate's spot welded seam (8 spots per seam) juts out
right where you would expect it to get hottest, maybe it is aligned
this way for radiant heatsink?

I can photo and/or XRay this tomorrow if having it for comparison
is meaningful.
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Old 26th September 2008, 02:07 AM   #19
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Quote:
Originally posted by kenpeter
I got Chinese 6L6-GCR with straight glass no bigger diameter than
the octal base...

I can photo and/or XRay this tomorrow if having it for comparison
is meaningful.
Something like these?
Click the image to open in full size.

I'd love to see x-ray photographs of their insides. That kind of stuff is always cool.
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Old 26th September 2008, 02:17 AM   #20
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Yup, same internal structure. But black base, no getter on top,
no bottom mica side supports. Either my base is slightly bigger,
or the glass slightly smaller, the outside diameters are equal.
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