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Use Flex as receiver ( RX )

RuiRui Member
Can I use Flex as sub receiver, and TX from other radio?


  • Bob G   W1GLVBob G W1GLV Member ✭✭
    edited June 16
    OK as long as you use a Transmit/Receive switch. You don't want to introduce RF into the receiver input stages. Sure death for the receiver.
  • RuiRui Member
    edited November 2019
    you mean MFJ-1708SDR ?
  • HCampbell  WB4IVFHCampbell WB4IVF Member ✭✭
    edited April 2019

    Yes, or an RTR-2.  Take a look at the RTR-2 User Guide.  It has many diagrams showing possible configurations:


    I have used the previous model (RTR-1A) for years with my Flex and other radios with never a problem.

  • RuiRui Member
    edited April 2019
    I live in Portugal only  can find MFJ

    How does it work? What cables and connections should I do.
    I can transmit using other radio with no problem?

    The antenna connects to the flex and than Flex to switch and to TX radio?
  • HCampbell  WB4IVFHCampbell WB4IVF Member ✭✭
    edited April 2019
    I can send you the RTR2 guide if you can't access the DXE web site.  It has detailed diagrams for many configurations and should answer all your basic questions.  It is very useful even if you go with the MFJ or another brand. My Email address is good on QRZ.
    Its all very simple, connect the switch to the antenna, to your transmitting rig's TX port, a Flex antenna port, and use either PTT or RF sense (MJF unit only) for switching (I would use PTT if you select the MFJ).  Just remember not to transmit with the radio used for RX only!

  • Chris DL5NAMChris DL5NAM Member
    edited April 3
    Mini-Curcuits   ZEDC-15-2B
  • Nick RN3KKNick RN3KK Member ✭✭
    edited November 2019
    Rui, pse send me email to [email protected] I have info for you

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