[Boatanchors] Question for Eimac 4-65A Tube

[Fuqua, William L.]

  Night light,
Now, there is an interesting use for all the 4-65A tubes I have.
Now, saying that, it seems, according to data sheets, that the 4-65A tube will produce 375 Watts PEP as class AB2 SSB amplifier. Wonder how clean it is when used that way?

73
Bill wa4lav

________________________________
From: Boatanchors <boatanchors-bounces at puck.nether.net> on behalf of Scott Johnson <scottjohnson1 at cox.net>
Sent: Saturday, November 7, 2020 5:44 PM
To: 'William Morton' <w_b_morton at hotmail.com>; 'boatanchor' <boatanchors at puck.nether.net>
Subject: Re: [Boatanchors] Question for Eimac 4-65A Tube

CAUTION: External Sender


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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