 |
| Identical to |
UCH21 = UCH71
|
| Similar
Tubes |
Other base: UCH4; UCH5
|
| First Series |
Jan.1941 Tube leaflet collection E.Erb Analysis by original leaflets (P11) |
| First Source
(s) |
Jan.1941 : Philips-Archiv
|
| Predecessor Tubes |
UCH4
CCH2
CK3
|
| Successor Tubes |
1948
UCH42
UCH81
UCH41
|
|
| Base |
Loctal-8, B8G (Sylvania, 1938) (Codex=Vao)
|
| Filament |
Vf 20 Volts / If: 0.1 Ampere / -: Indirect / -: Series, AC/DC / |
| Tube prices |
3 Tube prices (visible for members
only)
|
| Literature |
Taschenbuch zum Röhren-Codex 1948/49
|
|
|
| |
|
| |
Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus
|
|
 |
|
Own collection
Eduard Abfalterer
|
| Variants |
|
RTT Schwandt
Günther Stabe
|
|
RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
|
|
 |