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grundig: Radio works FM/UKW but not on AM/MW

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Forum » Radios and other type of sets (Physics) etc. » MODELS DISPLAYED » grundig: Radio works FM/UKW but not on AM/MW
           
Omer Suleimanagich
Omer Suleimanagich
 
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15.Apr.17 02:37

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Radio only is working on FM mode. My question is, I understand that zener diodes and sometimes varistors are used, is this a zener diode issue?

Also, I would like to replace ALL the zener diodes in this radio, but I don know what values

Michael Watterson
 
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15.Apr.17 11:30

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Why replace zener diodes? They are rarely ever faulty in battery equipment.

If it works on any SW band, then suspect a connection to the ferrite stick loop aerial.

See first is AM IF working.

Omer Suleimanagich
Omer Suleimanagich
 
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16.Apr.17 00:28

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This unit is battery and ac  Grundig, during the sixties had many different models that needed zener diodes replaced in their transistor units (from my own experiance)

  
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