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Symfoni-3D EF41 and EM85

Symfoni-3D ; Radionette; Oslo (ID = 241993) Radio Symfoni-3D ; Radionette; Oslo (ID = 241995) Radio
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Symfoni-3D ; Radionette; Oslo (ID = 241993) Radio
Radionette; Oslo: Symfoni-3D [Radio] ID = 241993 682x470
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For model Symfoni-3D EF41 and EM85, Radionette; Oslo
 
Country:  Norway
Manufacturer / Brand:  Radionette; Oslo
Year: 1956 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 7: ECC85 EF86 ECH81 EF41 EM85 EABC80 EL84
Semiconductors (the count is only for transistors) Tr.Gl.=Metal-rectif.
Main principle Superheterodyne (common); ZF/IF 455 kHz
Wave bands Broadcast, (BC) Long Wave (LW), 2 x SW and FM or UHF.
Details
Power type and voltage Alternating Current supply (AC) / 110-230 Volt
Loudspeaker 2 Loudspeakers
Power out
from Radiomuseum.org Model: Symfoni-3D [EF41 and EM85] - Radionette; Oslo
Material Wooden case
Shape Tablemodel with Push Buttons.
Dimensions (WHD) 670 x 370 x 240 mm / 26.4 x 14.6 x 9.4 inch
Notes

See also Radionette Symfonie-3D with EF89 and EM81 instead of EF41 and EM85.

Price in first year of sale 790.00 NKr.

Model page created by Ernst Rykkje. See "Data change" for further contributors.



All listed radios etc. from Radionette; Oslo
Here you find 134 models, 124 with images and 45 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




 


Forum contributions about this model
Radionette; Oslo: Symfoni-3D
Threads: 1 | Posts: 6
Hits: 508     Replies: 5
radionette: How do I know which tube is bad?
Christer Wærnes
24.Feb.19
  1

Hello

So I restaured this radio a while back and it has been working fine until this yesterday. When I turn it on, there's alot of crackles and pops in the speakers. It's like it takes a while for it to pick up the sound and  get going. The magic eye also seems to correlate with the problem, it doesn't turn on/close until the cracks and pops goes away and there's reception. It's working ok but these noises comes and goes. It's more of a problem right when I power the radio on. I am pretty sure this is a bad tube, but there's six tubes in this radio and I don't have a tube tester. I'm thinking maybe it's the preamp tube (EF86), but that's just a guess.

If someone has any ideas it would be much appriciated, Chris

Rolf Beckers
26.Feb.19
  2

Dear Christer,

Many other reasons could be the source of your problem. If tubes are the reason, I would first try to change the EL 84 and then the EABC 80. Again many other components could make such trouble.

Regrds,

Rolf Beckers

Christer Wærnes
26.Feb.19
  3

Thank you for your reply Rolf.

I am now pretty sure as you are suggesting, that the EABC80 tube needs to be replaced. When I tap this tube there's a microfonic noise in the speakers, the EL84 is new. Also there is no problem using the radio to listen via the phono input. I ordered a replacement tube and I am confident this will solve the problem.

Thanks again! Christer

Uwe Roose
27.Feb.19
  4

Dear Christer,
if one of the tubes realy causes the problem and, as you wrote there is no cracking when you switsch the radio on after choosing the phono input, the triode system of the EABC80 seems to be o.k.
Than chose MW before switching your radio on. If the cracking does show up again, the cracking is caused in the FM path, for instance in the ECC85, EF86 or EF89 and - less orbable -  in the diodes of the EABC80, but the ECH81 can be excludet.
An other check might be: Remove the ECC85. After switch on you should hear only noise but no cracking if the ECC85 is the culprit.
Good success.
Ragards Uwe

Christer Wærnes
27.Feb.19
  5

Thanks for the reply Uwe

The crackling- and pop noises are gone now and the radio works only with the phono input. When I have my PC plugged in with music, there's music on all bands- FM, SW, MW, LW. But it sounds better on "G", which is the right one for phono. Another thing I should mention is that I replaced the 0.004uF capacitors with 0.0033uF. Maybe that's too much difference in value? It's hard to find .004. Also, the voltage in my appartment is sitting at approximately 236V and that's a little bit over the radio's 230V.

Maybe the different value capacitors from the originals and the voltage in my place being higher is causing problems?

Regards, Christer

Daniel Consales
28.Feb.19
  6

Hello Christer,

if you can hear the computer sound on all bands your computer is most likely connected to the tape output instead of the input. If that is not the case, there has to be a short somewhere.

 

P.S.: the usual value to replace 4nF (0,004µF) is 3,9nF which is easily available.

 
Radionette; Oslo: Symfoni-3D
End of forum contributions about this model

  
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