[Boatanchors] Question for Eimac 4-65A Tube

Robert Vincent robvi3 at gmail.com
Sat Nov 7 13:57:19 EST 2020

NO, itv should not for that length of time. They usually burn in the tubes
for longer than that.  Rob K1DFT

On Sat, Nov 7, 2020 at 1:51 PM William Morton <w_b_morton at hotmail.com>

> Hello Everyone,
> My son and I have a question regarding firing up the filament of a 4-65A
> tube with no connection to the grid or plate (and no plate cap heat sink,
> either):  If we light up the filament and leave it glowing for a long time,
> is there any danger to the tube?  It would be akin to using it as a
> nightlight (which we are not).  By a 'long time', let's say 5 hours.
> Thanks in advance for any comments.
> Best Regards,
> William, and Son
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Robert Vincent
DLM Antenna Technology

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