[R-390] OT: Low-voltage tubes

[Scott, Barry (Clyde B)]

I think the 1L6 may have tested good (I don't remember for sure).  I'm
pretty sure one of the 1U4s tested bad.  We have a big hamfest this weekend
(Huntsville HamFest).  I'm going to look for tubes for it there.  We usually
have one or two guys there with a large tube collection.

Thanks,

Barry - N4BUQ

-----Original Message-----
From: David Wise [mailto:David_Wise@Phoenix.com]
Sent: Friday, August 15, 2003 12:21 PM
To: Scott, Barry (Clyde B); R390 (E-mail)
Subject: RE: [R-390] OT: Low-voltage tubes


> I recently had to have a Zenith TransOceanic.  This is the 
> H500 model so it
> is still tube stuff (except for the selenium rectifier).
> 
> My question is do these low-voltage tubes glow very much?  

Not that you would notice.  The filament runs at the same
temperature as other oxide-coated emitters, but it's too
small to excite many of your cones.  If you had a tele-microscope
you could see it.  By the way, treat the 1L6 with extra care,
particularly if it has a strong gm reading.  They're rare.

73,
Dave Wise