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RE: Strange failure mode of cathode resistors

Yes, 10 watt devices are likely indestructible :)

Now with respect to the 6080s. Everything I've seen about them indicates that they need to be preconditioned before use! So if the tubes are NOS, they should be run with filaments only for at least 72 hours. If they have already been run with B+ then its too late, but its something to keep in mind in the future.

BTW nice job on the construction!

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