[Boatanchors] Question for Eimac 4-65A Tube

Scott Johnson scottjohnson1 at cox.net
Sat Nov 7 17:44:32 EST 2020

It is basically a tungsten lamp with a Titanium lampshade.  Go for it.

Scott V. Johnson W7SVJ
5111 E. Sharon Dr.
Scottsdale, AZ 85254-3636
H (602) 953-5779
C (480) 550-2358
scottjohnson1 at cox.net
scott.johnson at ieee.org

-----Original Message-----
From: Boatanchors <boatanchors-bounces at puck.nether.net> On Behalf Of William
Sent: Saturday, November 7, 2020 11:51 AM
To: boatanchor <boatanchors at puck.nether.net>
Subject: [Boatanchors] Question for Eimac 4-65A Tube

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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