Use Flex as receiver ( RX )

Rui

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

Bob G W1GLV

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.

Rui

you mean MFJ-1708SDR ?

HCampbell WB4IVF

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

https://www.dxengineering.com/parts/dxe-rtr-2/documentation

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

Howard

Rui

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 WB4IVF

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!

Howard

Chris DL5NAM

Mini-Curcuits   ZEDC-15-2B

Nick RN3KK

Rui, pse send me email to rn3kk.nick@gmai.com I have info for you