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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Re: Why do my tubes keep blowing? posted by occ on December 8, 2006 at 00:58:30:
Nathan,The answers that everyone is giving you, Sean in particular, are correct. As a practical matter, measure the AC voltage between pins 2 and 7 on one of your output tubes sockets if you are using any of the output pentodes that Sean mentioned. If your voltage is greater than 6.3VAC, that's the problem.
Now, you can reduce that voltage. You can desolder the two wires into the socket from the power transformer and put two 0.1 ohm/5 watt resistors in series with the leads from the power transformer and you'll likely never have a problem again. Unfortunately, the second you lay a hot soldering iron on that amp, you are going to void your warrantee with Jadis and those folks aren't going to deal with you anymore. Do you really want that? Consequently, your only option is to use a power conditioner or even a high current variable autoformer to reduce your line voltage. Remember, though, that the real standard that you need to meet is the voltage between pins 2 and 7 of your output tubes' sockets. So long as that voltage is 6.3VAC to, as Sean mentioned, 5.7VAC your amp should operate fine.
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Follow Ups
- Re: Why do my tubes keep blowing? - corerosin 10:12:55 12/08/06 (0)
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