grundig: 4085 3D; Grundig Majestic, EL84

ID: 252333
? grundig: 4085 3D; Grundig Majestic, EL84 
21.Apr.11 06:26
22

Omer Suleimanagich (USA)
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Omer Suleimanagich

Upon restoring this radio, I discovered that there was hardly any tone coming out of the speakers, when I placed the Soviet equivalent of the EL84, a 6P14P tube/valve.

Turning the radio off immediately, and then turning it on again, using a Telefunken EL84 tube, I was able to get satisfactory tone from the radio again!

Naturally, I thought something was defective with the 6P14P tube, but to my astonishment it tested excellent on my tube tester.  I then assumed that this tube might have the same issues a 7189 tube would have for this radio, but the pinout and specs are virtually identical for 6P14P and EL84.

I then proceeded to look at my various schematics for this radio, and discovered that the 47K resistor that is supposed to be connected to pin 2, was connected instead to pin 1 on my radio.  With amazement, I proceeded to see where the same 47K resitor was soldered to on my parts radio (same exact Grundig radio for export), and it is soldered on pin 1, instead of where it is supposed to be soldered, on pin 2!

My question is, was this intended by the manufacturer, or is it an assembly line error? 

 

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Connections are wrong? 
21.Apr.11 10:50
22 from 3360

Hans M. Knoll (D)
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Hans M. Knoll

  

 

My answer  was not sufficient and did not find any acceptance.

 sorry knoll

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