 |
| Identical to |
1561
= RGN2004
= 4655
= WE52
= GL4
|
| Similar
Tubes |
R561 (can normally be replaced - small diff'ce)
VG420 (can normally be replaced - small diff'ce)
VG4200 (can normally be replaced - small diff'ce)
G4120_Triotron (can normally be replaced - small diff'ce)
|
| First Series |
1928 Tube leaflet collection E.Erb Analysis by original leaflets |
| Successor Tubes |
AZ12
AZ4
AZ2
|
|
| Base |
Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
|
| Filament |
-: Direct /
If: 2 Ampere /
Vf 4 Volts /
|
| Tube prices |
1 Tube prices (visible for members
only)
|
| Literature |
Taschenbuch zum Röhren-Codex 1948/49
|
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|
| |
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Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus
|
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 |
|
Sammlung GJ
Gerd Junginger
|
|
Telefunken Werkstattbuch
Wolfgang Bauer
|
|
Valvo-Röhren-Daten 1934
Jacob Roschy
|
|
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