| Identical to |
B443
= LL415
= ME4_362
= R79_5pin
= W443
= 425PT
= 415QD
= 415PT
= 415PP
= PP415
= DX3
|
| Similar
Tubes |
PT415 (other base)
PT415_5pin (can normally be replaced - small diff'ce)
R79 (other base)
RO4243 (other base)
RO4243_5pin (can normally be replaced - small diff'ce)
S_5pin (can normally be replaced - small diff'ce)
T60_Adzam_4pin (other base)
T60_Adzam_5pin (can normally be replaced - small diff'ce)
TB43 (other base)
TB43_5pin (can normally be replaced - small diff'ce)
TL414 (other base)
TL414_5pin (can normally be replaced - small diff'ce)
TU415 (can normally be replaced - small diff'ce)
P420_5pin (can normally be replaced - small diff'ce)
PB4_5pin (can normally be replaced - small diff'ce)
415QD_4pin (other base)
415PT_4pin (other base)
415PP_4pin (other base)
410PT (other base)
4GBF (can normally be replaced - small diff'ce)
B443_4pin (other base)
L43 (can normally be replaced - small diff'ce)
B443S (can normally be replaced - small diff'ce)
L43m (can normally be replaced - small diff'ce)
|
| First Series |
Sep.1927 Tube leaflet collection E.Erb Analysis by original leaflets |
| Successor Tubes |
1929
C443
RES164
PP430
|
|
| Base |
Europe 5-Pin (O5A, B5) (Codex=Foo)
|
| Was used by |
Radio/TV-reception etc. |
| Filament |
-: Direct /
-: Battery = /
If: 0.15 Ampere /
Vf 4 Volts /
|
| Description |
Output pentode, on market Sept. 1927
Equivalent types: RES174d (Telefunken),
L415D (Valvo), PP415 (Tungsram)
Successors: B443S, L416D, RES164
The B443 is the first produced output pentode of the world, introduced
by Philips in September 1927. It's amplification and its power output was much higher as with an output triode of equal size. The B443 has established the replacement of output triodes by multiple-grid output tubes. The equivalent
Telefunken type RES174d appeared in 1931.
[Jacob Roschÿ, 2003-Jan-14]
Text in other
languages (may
differ)
|
| Tube prices |
2 Tube prices (visible for members
only)
|
| Literature |
Taschenbuch zum Röhren-Codex 1948/49
|
|
