Hello. Just got new belts for my National mono boombox.
I realised that cassette works very loud like it should, and radio has lower sound lets say 50% less then tape. So problem is not in audio amplifier stage in my amateur opinion. I tested all caps and problem isnt in them. Where do you think i should look and what might be the problem? Can you point to the components or part that might be bad and you think needs further testing on this diagram. As i have learnt there is RF amplifier after which comes audio amplifier so the problem might be in RF amp. If you could point me to that part of circuit so i can test it if you agree that there might be an issue. Here is photo and diagram. Thanks everyone for helping me fix this beautiful boombox and keep them alive.
I realised that cassette works very loud like it should, and radio has lower sound lets say 50% less then tape. So problem is not in audio amplifier stage in my amateur opinion. I tested all caps and problem isnt in them. Where do you think i should look and what might be the problem? Can you point to the components or part that might be bad and you think needs further testing on this diagram. As i have learnt there is RF amplifier after which comes audio amplifier so the problem might be in RF amp. If you could point me to that part of circuit so i can test it if you agree that there might be an issue. Here is photo and diagram. Thanks everyone for helping me fix this beautiful boombox and keep them alive.
