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Country:
United States of America (USA)
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Brand:
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Common type USA tube/semicond.
Genalex, BGE (brand), British General Electric Co. Pty Ltd.; Sydney, NSW.
Osram (tubes/valves) - see British General Electrics; Sydney
Philips Australia
Canadian Marconi Co. Ltd. (CMC, Esterline), Marconi's Wireless; Montreal, QC
Airline, Super-Airline, Wards (tubes) - see also Montgomery Ward; Chicago, IL
Brunswick-Balke-Collender Co.
Concert Master Mfg. Co. (brand) - see also Continental Corp.; Chicago, IL and Newark NJ
Duro / El Duro (tubes)
Lafayette Radio & TV Corp; New York (NY)
National Union Radio Corp.; Orange (NJ)
Norelco, North American Philips Co. Inc.; Dobbs Ferry and New York, NY
Perryman Electric Co., Inc.; North Bergen, NJ
Songbird (brand)
Sylvania (Hygrade, GTE, Nilco); Emporium (PA)
Triad Television & Mfg. Co.; Pawtucket, RI
Wizard (tube brand); (where ?)
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| Tube type: |
Vacuum Pentode Power/Output |
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| Identical to |
47
= P2
= 247
= PZ
= UY-47_Japan
= UY-247_Japan
= A247
= VT-47
= PH247
= Z-47
= UY247B
= UY247
= CV1772
= VT47_USA
= F247
= 38047
= G-47
= 247S
= EY647
= NY-247
= 447
= UY-247
= T-47
= RX247
= c-47
= NU-47
= UY647
= TS247
= ER247
= KR47
= Y-247
= PPX2470
= CL-47
= PA247
= RYB247
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| Similar
Tubes |
Other shape (e.g. bulb type):
248
; M47
Normally replaceable-slightly different:
47B
; 47E
; 47M
; FX247
; RES347
Other class quality (otherwise equal):
1610_RCA
Different connections:
UX47A
Other base and data slightly different:
47MG
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| First year |
1931
Radios von gestern, 2. Auflage
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| First Source
(s) |
Jun.1931 : -- Collector info (Sammler)
Jun.1931 : 70 Years of Radiotubes and V.
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| Predecessor Tubes |
PZ
|
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Successor Tubes
|
1932
2A5
42
47MG
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| Base |
UY-Base, 5 Pins (USA, April 1927) (Codex=Hy)
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| Filament |
Vf 2.5 Volts / If 1.75 Ampere / Direct / Specified voltage AC/DC |
| Tube prices |
3 Tube prices (visible for members
only)
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| Information source |
Essential Characteristics, GE 1973
Taschenbuch zum Röhren-Codex 1948/49
|
47: Courtesy Bureau Belper (De Muiderkring, Bussum)
Anonymous 10 Collector
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47: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
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Just Qvigstad
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47: Sylvania Technical Manual
Peter Hoddow
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2484
Collection of
Collection of a member from USA Collection of a member from FIN Collection of a member from D Collection of a member from D |
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Variants
47 with dome bulb
|
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47 with Indirect heating 2,5V 1,5A. The cathode ist connected on pin 5 and the grid 1 and grid 3 are connected to pin 3.
Perhaps based on a 2A5 with UY5 socket and 47 designation.
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Metal coated cylindrical glass version. Complete name: M47. The letter "M" appears only on the boxes and enclosed paperwork, not on the tubes.
Please klick here: M47
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