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Builder Nordmende
Model Fidelio 58
Year April, 26 1957
Bands LW - SW - MW - FM - Phono
Tubes ECC85 - ECH81 - EF85 - EM84 - EABC80 - EL84
Tuning Supereterodyne with M.F.  469Khz and 10.7Mhz
Power 110-220 Vac
Size 64x40x25
Power audio tube Penthode EL84
Magic eye EM84

 
Close view of the wood cabinet before its restoration. It was not necessary a great work, the cabinet was in a quite good conditions, this due to the age of this radio too. (1957)
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Click on the picture to enlarge it
Here you can see the internal of the radio the day just arrived in my... garage. On the bottom of the chassis , over a ground metallic shield I found its original schematic diagram.. A nice surprise!

A detailed view of the manufacturing date stamp, inside the wood cabinet. For curious people the april, 26 1957 was a friday :)
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Here you can see the receiver while reassembling, after the cabinet restoration. Note one of the two big speakers and marked with a yellow circle the 3D tweeter. Infact in this receiver there is a bakelite horn (see the top picture) wich expand the produced sound and seems like a 3D effect. In the Grungid 3D KLANG there is a similar circuit too.



Detailed rear picture of the chassis until remove from the cabinet. The circuitry is a quite complex but all the wirings (point-to-poin) are exellent. note that in this receiver all the electronic regulations are possibile WITHOUT any necessity to remove the chassis, this because on the bottom of the cabinet there is a hole to use for this purpose.



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Click on the picture to enlarge it


Front view of the radio, you can see the complexity of this receiver, the red circles are the tone control knob, the green one the internal ferrite aerial indicator. On the top infact you can see the interna ferrite antenna which can be rotate to improve the signal strenght.



Internal bottom view of this radio, very... dense :) Inside the yellow circle you can see the rectifier I change becuse its original was broken. Very smart the idea to put all the AF trims and coils accessible from the bottom of the cabinet.



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Detailed and elnarged view of the nice mechanism used to switch the tuning indicator on the tuning scale while passing from AM to FM. This permits to keep the tuning scale completly separated, with two indicators.
Enlarged view of the original broken seleninum rectifier (the red one) and the new one, made with a classic diodes GRAETZ bridge just mounted on a little multi-holes board. The original one looks ok but only without any load. When apply the tubes load the voltage drop until... 30 volts!
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Click on the picture to enlarge it		 In this radio exist an internal ferrite antenna too, wich is possible to move from a knob on the front panel. With this movement is possibile to adjust better the tuning of local and distance stations. Don't forget that this radio was a top class receiver across the '50.

Detailed view of the TEST POINT PLATE, placed on the rear of the chassis, a smart idea very useful. From these TP infact is possibile to check pratically all the receiver, from its anodic voltage to the AGC, the MF discriminator and so on.



Very close and enlarged view of the magic eye, an EM84 type. With this tuning indicator is possibile to make a fine tuning of the stations, both on AM that in FM.
The receiver when the restoration has finished, now it looks new and sounds better! Note the buttons over the tuning scale used as audio equalyzer. The sound of this radio is really great, warm, with a great equalization, due to the two elliptic loudspeakers and the 3D tweeter.

 

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