Unknown tubes

[Ivabiggun]

Hi, can someone identify the output tubes? I think they are 5881's but I am not sure. They were sent to me over two years ago along with an amp that was to be repaired, but the owner never got back to me on it. I want to use them in a 5E3 type circuit I built which uses a solid state rectifier and a Blackface Deluxe power and output transformers. I have a pair of 1950's 6V6's but I don't want to use them as the plate voltages will be too high.

Here are the links to my Photobucket account with some photos: http://i169.photobucket.com/albums/u217 ... 010004.jpg" onclick="window.open(this.href);return false; http://i169.photobucket.com/albums/u217 ... 010003.jpg" onclick="window.open(this.href);return false; http://i169.photobucket.com/albums/u217 ... 010002.jpg" onclick="window.open(this.href);return false;
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Thanks for the help

Iva

[demonufo]

Looks the same as a crappy set of Sovtek 5881's I pulled out of a Marshall Dual Reverb recently.

[Cheech]

Russian Standard 6P3S tube. Not the enhanced long life version. Used to open bomb bay doors on aircraft. Rated for lower voltage but can take higher voltage. I have been reading about the 6P3S-E version and I have heard some people say it can take 450v to 500v.

These tubes are a russian copy of a american tungsol 5881. Some people say they sound good. I talked to Terry and he said it does not sound very great however, They are a very strong tube.

Datasheet. Remember they can take twice their rated voltage. Terry says its political reasons they were rated for lower.
http://www.tubes.ru/techinfo/HiFiAudio/6p3s.html

Slowly reading about the 6P3S vs 6P3S-E. The E is a military model and the better tube. The normal ones like you have are no so great from what I read.