Pinched Tubes

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I was recently shopping for replacement tubes for my universal player, specifically E182CC/7119's. One offer included a pair of NOS tubes that were made in Holland over 40 years ago. They were describes as "pinched tubes", and upon further inquiry, I was told that pinched tubes would only protect against noise caused by vibration in the glass (which I presume could also be controlled by dampers), but more important would also control vibration in the metal element contained in the tube. Since these pinched versions were significantly more expensive, I would appreciate your input on whether this claim for pinched tubes is accurate or not. Interestingly, I don't see many tubes, even some well know names, that bear this designation, so I'm wondering why there aren't more manufactured if they are truly superior.

Thanks

Pete

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Topic - Pinched Tubes - Pete Watt 18:16:04 06/14/15 (6)

RE: Pinched Tubes - TubeAcolyte 08:23:38 06/15/15 (0)

RE: Pinched Tubes - Mendel 08:19:38 06/15/15 (1)

+1 - Joe Appierto 13:49:01 06/15/15 (0)

RE: Pinched Tubes - JKT 07:35:07 06/15/15 (2)

RE: Pinched Tubes - geoff 07:45:01 06/15/15 (1)

RE: Pinched Tubes - Mechans 11:30:04 06/17/15 (0)

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