Radio is a Flex 6300. I have come into possession of a Microwave Modules 144/28 MHz transporter. This particular transverter has to IF ports, Input and Output. I can assume that I will need to construct a relay box to connect to the single XVTR port?
Are you sure that it requires separate IF TX/RX connections as I have a MM 144/28 transverter and although it has RX/TX ports, using the RX port is optional and it will also work with a single TX/RX connection on the TX port?
I'll run down the ports on it, from left to right. 144 MHz output, 144 MHZ input, Power/TR, If output, IF input. Microwave modules made some slightly different versions, and I think but am not sure they just changed the names on the ports. Mine looks like this unit : http://www.elecraft.com/TechNotes/K2&MMT144.pdf
Which a fellow used to interface with a K2. There shouldn't be a need for the 10 db attenuator, but with the single XVTR output on the Flex, it seemed a relay box to go to the appropriate IF connector would be in order.