 |
| Identical to |
UM35
|
| Similar
Tubes |
UM11 (other base)
UM305 (Multiple differences or of other kind)
|
| First Series |
1952 Tube leaflet collection E.Erb Analysis by original leaflets |
| First Source
(s) |
May.1952 : Telefunken-Röhrenmitteilungen
|
| Predecessor Tubes |
UM11
|
|
| Base |
Octal (Int.Octal, IO) K8A, USA 1935
|
| Was used by |
Radio/TV-reception etc. |
| Filament |
-: Indirect /
-: Series, AC/DC /
|
| Tube prices |
3 Tube prices (visible for members
only)
|
|
|
| |
|
| |
Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus
|
|
|
|
Ratheiser Röhrenhandbuch 1955
Gerhard Heigl
|
|
RTT Schwandt
Günther Stabe
|
|
Funkschau Röhrendokumente
Michael Schlör
|
|
|
