Make sure you set the filament voltage to or just below spec with a good
VOM, preferably an RMS meter, or it won't give you the life you would like.
Ray, W4BYG
On 11/7/2020 22:44, Scott Johnson wrote:
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
scottjohns...@cox.net
scott.john...@ieee.org
-----Original Message-----
From: Boatanchors <boatanchors-boun...@puck.nether.net> On Behalf Of William
Morton
Sent: Saturday, November 7, 2020 11:51 AM
To: boatanchor <boatanchors@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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