Type 10/VT-25 Tube List
The
Type 10 tube is a filamentary triode tube with a filament voltage of
7.5 volts and filament current of 1.25 Amps. It has a standard
UX4 base 4 pin base. It is typically used as an audio amplifier
tube. Max Plate voltage is 425 Volts and Max Plate Dissipation is
12 Watts.
The US Military
designation is VT-25. There were two types of filaments used with
10's. Most common is the Thoriated Tungsten variety which have
short plates and glow quite brightly when the filament is
activated. There was also a coated filament variety which had
"long" plates. These were called VT-25A's Contrary to
popular belief, these DON'T have a higher power rating. Early
10's were in the "globe" shaped envelope (S) and later ones were fitted
with the "ST" shaped envelope. There were 2 different sized ST
envelopes used. (small & large)
| Type |
Description |
Price |
| VT-25 / 10Y |
ST Shape,
Brown Base. Usually Military Surplus but not always. They
were made primarily by Sylvania, RCA and Hytron. This is the
short plate version with thoriated tungsten filaments |
$79 new
$45 used
|
| VT-25A |
ST Shape,
Brown Base, Long Plate with oxide coated filament. Usually
found in Hytron and Sylvania brands. I've never seen an RCA
VT-25A. |
$99 new
$59 used
|
| VT-25A |
Western Electric,
ST Shape, Ceramic base, Long Plate with Oxide Coated Filament.
These are really nice tubes but are very rare. They are quite
expensive when I have them available. Please email for prices and
availability |
Call/Email |
| 10 ST |
ST Shape, Black
Base, Short Plate/Thoriated Tungsten Filament. These are really
just like 10Y's but have a black base. Usual brands are RCA,
Sylvania, Hytron, but may be found in other brands like GE. |
$79 new
$45 used
|
| 10 Globe |
Globe (S) Shape,
Short Plate, Thoriated Tungsten Filament. These are like the ST
tubes above, but have the cool globe shaped glass envelope. Most
of them are RCA's. |
$119 new
$69 used
|
| 10 Globe |
Globe Shape (S),
Long Plate, Oxide Coated Filament. Various brands. Most are
of the lesser known brands like Speed, etc. They are very early
versions of the 10 |
Call/Email |
| 10 Globe Mesh |
As above but with
the highly desired mesh plate. These are of the earliest of the
10's and are very rare. |
Call/Email |
|
