Antique radios, Old Time Radios
247A
|
Country:
United States of America (USA)
|
|
| Identical to |
247A
|
| Similar
Tubes |
Other class quality (otherwise equal):
244A
|
| First Source
(s) |
1929 : Saga of the Vacuum Tube, Tyne
|
| Base |
UY-Base, 5 Pins (USA, April 1927)
|
| Filament |
Vf 2 Volts / If 1.6 Ampere / Indirect / Specified voltage AC/DC |
| Description |
Early type had solid anode, later type used a mesh anode and ST14 bulb. Higher mu version of 244A; mu 15, 0.52 to 1.2mS. Base without locating pin.
|
| Information source |
Babani, International Radio Tube Encyclopaedia W.E.Greybar catalog 1933
- - Manufacturers Literature
Tube Lore (I)
|
|
247A: KoBi
Konrad Birkner † 12.08.2014
More ...
|
Just Qvigstad
|
247A: KoBi
Konrad Birkner † 12.08.2014
More ...
|
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2
Collection of
|
|
|
|
You reach this tube or valve page from a search
after clicking the "tubes" tab or by clicking a tube
on a radio model page. You will find thousands
of tubes or valves with interesting links. You
even can look up radio models with a certain tube
line up.
[rmxtube-en]
| Data Compliance |
More Information |
|
|
|
