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Folkemottager Nett2

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Folkemottager ; Radionette; Oslo (ID = 1314154) Radio
Radionette; Oslo: Folkemottager [Radio] ID = 1314154 900x573
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For model Folkemottager Nett2, Radionette; Oslo
 
País:  Noruega
Fabricante / Marca:  Radionette; Oslo
Año: 1937 ?? Categoría: Radio - o Sintonizador pasado WW2
Válvulas 3: E446 E453_6pin 506
Principio principal RFS (Radio Frecuencia Sintonizada) en general; 1 Etapas de AF
Número de circuitos sintonía 1 Circuíto(s) AM
Gama de ondas OM y OL
Especialidades
Tensión de funcionamiento Red: Corriente alterna (CA, Inglés = AC) / 230 Volt
Altavoz Altavoz electrodinámico (bobina de campo) / Ø 16 cm = 6.3 inch
Potencia de salida
de Radiomuseum.org Modelo: Folkemottager [Nett2] - Radionette; Oslo
Material Madera
Forma Sobremesa de cualquier forma, detalles no conocidos.
Ancho, altura, profundidad 430 x 250 x 205 mm / 16.9 x 9.8 x 8.1 inch
Peso neto 7.5 kg / 16 lb 8.3 oz (16.52 lb)

Modelo creado por Wolfgang Möller. Ver en "Modificar Ficha" los participantes posteriores.



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Contribuciones en el Foro acerca de este modelo
Radionette; Oslo: Folkemottager
Hilos: 1 | Mensajes: 5
Entradas: 1007     Réplicas: 4
radionette: incoherent socket on Folkemottager Nett2
Pierre De Man
02.Sep.16
  1

I just got a Folkemottager Nett2 with no tube. The output pentode is supposed to be E453-6 pin, but the corresponding socket (in the middle) looks like a P8A-8pin.

I wish to know what tube could have been used in this radio.  The cabling uses 7 of the 8 contacts of the sockets.  

Any hints would be welcome.

 

Jacob Roschy
02.Sep.16
  2

Hello Pierre,

there is no direct successor of the E453. As 7 contacts are wired, it's most likely the very common AL4 was used as substitute.
Note the grid bias voltages of E453 and AL4 are very different, so a bias re-matching might be necessary.

Best Regards, Jacob 

Pierre De Man
03.Sep.16
  3

Hello Jacob,

thank you for this information, it seems indeed a serious candidate. 

I think this socket swap has been made by the previous owner. It is fixed by means of screws (not rivets). Some capacitors seems also more recent than others. The bias could have been adapted.

Anyway I will have to draw the schematic to compare with the regular schematic and possibly confirm AL4. 

 

Regards

Pierre

Pierre De Man
04.Sep.16
  4

After checking the wiring of my radio, the cathode resistor of the output pentode is around 110 ohm which seems consistent with what is adviced for the AL4 (E453 would need 500 ohms). Jacob, I think you were right.

Pierre 

 

Jacob Roschy
04.Sep.16
  5

Hello Pierre,

the choice of P8-base substitute types for the E453 is rather small, only the types AL1, AL2, AL3 and AL4 are more or less qualified.

7 wired contacts fits only to AL3 and AL4, whereby the AL3 was only short-lived and is almost identical to the AL4.

The AL2 has a top grid cap, hence without control grid at the socket, the AL1 is directly heated, hence without cathode connection on the socket.

Regards, Jacob

 

 
Radionette; Oslo: Folkemottager
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