[R-390] OT: Low-voltage tubes

[David Wise]

> I recently had to have a Zenith TransOceanic.  This is the=20
> H500 model so it
> is still tube stuff (except for the selenium rectifier).
>=20
> My question is do these low-voltage tubes glow very much? =20

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