Antique radios, Old Time Radios
CV1234
|
Country:
Great Britain (UK)
|
|
| Identical to |
CV1234
= W560
= NT57T
|
| Base |
SPECIAL TUBEBASE in general
Wires only.
|
| Filament |
Vf 9 Volts / If 35 Ampere / Direct |
| Description |
NT57T silica valve, with anode (left) and grid (right) wire connections at the top, and filament at the bottom, also wire connections only. This valve has two 'hairpin' filaments, each with a pair of wires. The NT57T is the thoriated filament version of the NT57, the first valve to be made specifically for use in radar. The NT86, developed from the NT57T, had three filaments.
Silica glass has a very high melting point (between 1500 and 1700 C) and a low coefficient of thermal expansion. Normal glass softens at around 450 C. Because of these properties, silica glass does not crack by heat.
The picture of this valve features on the cover of the August 2003 issue of "The Collector", published by the "Tube Collectors Association".
|
| Information source |
Taschenbuch zum Röhren-Codex 1948/49
- - -
- - -
- - -
|
|
|
|
|
|
You reach this tube or valve page from a search
after clicking the "tubes" tab or by clicking a tube
on a radio model page. You will find thousands
of tubes or valves with interesting links. You
even can look up radio models with a certain tube
line up.
[rmxtube-en]
| Data Compliance |
More Information |
|
|
|
