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Up/Downconverter issues

Hi all,

I am having some issues with my up and downconverter. What I'm trying to do is to receive a 125 kHz signal, upconvert it to 433.125 MHz, transmit it, receive that signal, and downconvert it back to 125 kHz. I have 2 circuits which are shown in the attached images. I have verified that the mixers are working properly but there's something wrong going on and I can't seem to know what it is. Somewhere along the way the signal either isn't being transmitted or received properly. I would like to get some pointers and also to see if there is something wrong with the design of the circuit that I have missed.

Thank you

Upconverter Schematic

Downconverter Schematic (U2 is an LT6202)