| Identical to |
KF4
= 2B4_Ultron
= TKF4
= BHP61
|
| Similar
Tubes |
S210 (can normally be replaced - small diff'ce)
KF7 (different connections)
SP2B (other base)
SP2D (other base and data slightly different)
|
| First Series |
1936 Tube leaflet collection E.Erb Analysis by original leaflets (T7, V8) |
| First Source
(s) |
May.1936 : Philips Bulletin # F30
Feb.1936 : Philips Bulletin # D34
|
| Predecessor Tubes |
KF1
KF7
|
|
| Base |
Europe side contact base P (P8A) (Codex=Su)
Top contact with a cap
|
| Was used by |
Radio/TV-reception etc. |
| Filament |
-: Direct /
-: Battery = /
If: 0.065 Ampere /
Vf 2 Volts /
|
| Tube prices |
2 Tube prices (visible for members
only)
|
| Literature |
Taschenbuch zum Röhren-Codex 1948/49
|
|
