MX-P50M amplifier with UBITX

Discussion in 'Radio Circuits, Repair & Performance' started by KI7AJA, Jul 22, 2020.

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  1. KI7AJA

    KI7AJA Ham Member QRZ Page

    So I just received a MX-P50M amplifier in the mail to amp up my uBITX, however when I plugged it in the Tx on the amplifier was not working. I figured out last night that this was due to the fact that I had not plugged in ACC connector for amplifier. I had thought that the cable was only for the FT817. I figured out that there needs to be some sort of voltage on there to switch it to Tx mode. The problem is that the uBITX doesn’t have a built in ACC connector to tell the amp when to switch to Tx. I want to be able to do this manually and I figured if I just hooked it up to my bench power supply I could just feed it 13.8v and it would switch over. I really don’t want to fry the amp though so I decided I would come here to see if someone could help me out with this. The link to the amplifier schematic is here if anybody needs it.
  2. N8DAH

    N8DAH Ham Member QRZ Page

  3. KI7AJA

    KI7AJA Ham Member QRZ Page

    Thanks! It works great now!

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