| Country: |
Worldwide |
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Brand: |
Common type Worldwide |
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Tube type: |
Pentagrid-Converter (Heptode) Frequency converter Controlling (mu) |
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Tube ID = 428
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 |
| Identical to |
1R5
= DK91
= 1a1p
= VT-171
= X17
= 1A2_1R5
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| Similar
Tubes |
1R5T (Heater different)
1H33 (Heater different)
VT-171A (other base)
1R5_Loktal (other base)
400A_WE (Heater different)
400B_WE (Heater different)
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| First Series |
1940 Tube leaflet collection E.Erb Analysis by original leaflets |
| Predecessor Tubes |
1A7G
1LA6
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|
| Base |
Miniatur-7-Pin-Base B7G, USA 1940
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| Was used by |
Radio/TV-reception etc. |
| Filament |
-: Direct / -: Battery = / If: 0.05 Ampere / Vf 1.4 Volts /
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| Description |
Typ Va=90, Ia=1.6mA, gc=0.3. (Ferranti Literature)
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| Tube prices |
0 Tube prices (visible for members
only)
|
| Literature |
Essential Characteristics, GE 1973 Taschenbuch zum Röhren-Codex 1948/49 - - Manufacturers Literature
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Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Karel De Reus
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Röhrensammlung Wolfgang Bauer
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Telefunken Werkstattbuch Wolfgang Bauer
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Brimar Manual No. 7 Daniel Consales
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