Low-Mu Triode
{Long Pin Tube}
The 99 Vacuum tube went by many names as you can see from
the preferred substitutes below. It is a glass type
used as a general purpose tube designed for dry-cell operation. The
tube comes with long pins (UX). The short pin type has a (UV) designation.
These are NOT short pin tubes. They are Long pin.
Electrical Data:
Heater Voltage ............................ 3.3 DC V
Heater Current ............................. 0.063 A
Preferred Substitutes ................. 99,
57TX99, 99X, 199, 199_CeCo, 299, 399, 2952, AX199, BX, B_CeCo, CX299, CX399, DX-199, ER-X199,
GSX-199, MX199, NU-199XOKX-199, NX-199, RayX-199, RH199_UX, UX99, UX199, UX299, X199