|
Tubes Asylum Questions about tubes and gear that glows. FAQ |
|
|
|
Tubes Asylum Questions about tubes and gear that glows. FAQ |
|
In Reply to: Fireing up a NOS tube posted by ahlgren11@telia.com on August 13, 2006 at 11:47:43:
Hi. As a general rule power tubes don't like to sit doing nothing. I wouldn't worry about 40 year old beam power tubes as much as 80 year old ones. If you have ancient "power amplifiers" it is always a good idea to bring them up slowly. You can do this with a Variac autoformer. Power tubes can benefit from occasional operation rather than none. A power tube in operation will tend to clean itself. I have not seen this be a problem with tubes other than the "power" types. Once the tube has been operational for 5 or 10 hours or so you are in the clear. What can also help kill power tubes is a solid state power supply that comes on instantly. High voltage on the plate with a cold cathode can cause cathode stripping where actual emitter materials are torn away. If you have some 40+ year old tubes bring them up slowly as first - a great rule of thumb.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Fire up antique tubes - elektron 14:59:14 08/13/06 (4)
- Re: Fire up antique tubes - Rob Mercure 08:18:56 08/14/06 (3)
- Cathode Stripping and other things - elektron 12:05:20 08/14/06 (2)
- Re: Cathode Stripping and other things - elflow 12:58:29 08/14/06 (0)
- Re: Cathode Stripping and other things - Rob Mercure 12:39:54 08/14/06 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
