 |
| Identical to |
B405
= RE124
= LL25
= A25
= DP4
= DU412
= DV27/4
= L4
= L414
= L415
= M54
= U412
= V62
= H_Adzam
= P3
= P425
= CL975
= P414
= DX502
= CL104
= TB06
= LX410
|
| Similar
Tubes |
SP4_Triotron (can normally be replaced - small diff'ce)
C_Adzam (can normally be replaced - small diff'ce)
4BFF (can normally be replaced - small diff'ce)
BFF (can normally be replaced - small diff'ce)
C303B (can normally be replaced - small diff'ce)
C306B (can normally be replaced - small diff'ce)
420LL (can normally be replaced - small diff'ce)
R77 (can normally be replaced - small diff'ce)
P415 (can normally be replaced - small diff'ce)
|
| First Series |
1927 Tube leaflet collection E.Erb Analysis by original leaflets |
| First Source
(s) |
1925 : Saga of the Vacuumtube, Tyne p.421
|
|
| Base |
Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
|
| Was used by |
Radio/TV-reception etc. |
| Filament |
If: 0.15 Ampere /
Vf 4 Volts /
|
| Literature |
Taschenbuch zum Röhren-Codex 1948/49
|
|
|
|
|
|
g.h.
Gerhard Heigl
|
|
Telefunken Werkstattbuch
Wolfgang Bauer
|
|
Philips Verstärkerröhren
Gerhard Heigl
|
|
|
