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  1. EA5GU

    President Grant PC-406 -USB Problems

    FYI Hi guys. I found in the network the scheme of the station, it is a Cobra 2000 gtl, the motherboard is the same. This is something else. TNX
  2. EA5GU

    President Grant PC-406 -USB Problems

    Thank you very much for answering. This radio has 5 pins in the microphone, uses the PLL MB8719. I'm going to review the electrolytic capacitors. I'll tell you. Thank you 73
  3. EA5GU

    The radio in pure state

    The radio in pure state
    • EA5GU
    • Profile post
  4. EA5GU

    President Grant PC-406 -USB Problems

    Thank you for your quick answer. It receives well in USB and LSB, but the modulation does not go well, only noise in both modes, in FM and AM TX and perfect RX, it is as if the modulator in SSB does not work well but I do not know how to adjust it. Thank you
  5. EA5GU

    President Grant PC-406 -USB Problems

    Hi guys, thanks for giving me access. I need to adjust an old president grant, which on USB does not work, only noise, but I can not find the service manual of this radio. You can tell me how to adjust the SSB well so that it comes out fine. Thank you Paco EA5GU
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