How long does a 7199 last?

gnugear · 10th August 2005, 07:45 AM

Does it wear like a normal preamp tube or is it the kind that lasts forever (figuratively speaking).

EC8010 · 10th August 2005, 08:36 AM

If you leave it in the box, it will last very well. (Unless there's a faulty seal at the pins.)

Seriously, this is like asking, "How long is a piece of string?" In my experience, if you operate a valve at 1/3 of full dissipation it lasts so long that you don't get to find out its lifetime.

amperex · 10th August 2005, 06:16 PM

If operated within recommended parameters, about 5000 to 7500 hours for quality NOS.

gnugear · 11th August 2005, 06:45 AM

Thanks ...

10th August 2005, 07:45 AM	#1
gnugear diyAudio Member Join Date: Aug 2005	How long does a 7199 last? Does it wear like a normal preamp tube or is it the kind that lasts forever (figuratively speaking).

10th August 2005, 08:36 AM	#2
EC8010 diyAudio Moderator Emeritus Join Date: Jan 2003 Location: Near London. UK	If you leave it in the box, it will last very well. (Unless there's a faulty seal at the pins.) Seriously, this is like asking, "How long is a piece of string?" In my experience, if you operate a valve at 1/3 of full dissipation it lasts so long that you don't get to find out its lifetime. __________________ The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...

10th August 2005, 06:16 PM	#3
amperex diyAudio Member Join Date: Feb 2005 Location: MI	I can do better....... If operated within recommended parameters, about 5000 to 7500 hours for quality NOS.

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11th August 2005, 06:45 AM	#4
gnugear diyAudio Member Join Date: Aug 2005	Thanks ...

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