I have got a pretty large collection with tubes as a christmas present 
Several of them has unreadable labels and most of them are common TV tubes which not are that useful anyway.
But I would like some help with one type of tube which I have three of. It's a long size 9pin tube with goldplated pins and top anode which also are goldplated. It seems to be a double penthode tube. I have never come cross anything like this before.
As a challenge for all tubelovers before the new year arrive, I have taken two photos of one of the tubes and put up to see here
.
Please, is there anybody recognizing this tube?
Several of them has unreadable labels and most of them are common TV tubes which not are that useful anyway.
But I would like some help with one type of tube which I have three of. It's a long size 9pin tube with goldplated pins and top anode which also are goldplated. It seems to be a double penthode tube. I have never come cross anything like this before.
As a challenge for all tubelovers before the new year arrive, I have taken two photos of one of the tubes and put up to see here
.Please, is there anybody recognizing this tube?
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