[Boatanchors] Question for Eimac 4-65A Tube

[Ray LaRue]

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
> scottjohnson1 at cox.net
> scott.johnson at ieee.org
>
> -----Original Message-----
> From: Boatanchors <boatanchors-bounces at puck.nether.net> On Behalf Of William
> Morton
> 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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