I purchased a mk3 up and down converter to work with a FT857 transceiver and home brew PA.
All set for 432 LO.
Reception is great and accurate.
Transmit works wel but is always 500 kHz above the RX frequency to my surprise.
Very inconvenient !
Dxpatrol responds that this normal and caused by the satellite transponder.
That is true but the 500 kHz can easily be corrected by a small change in LO frequency I would say. 1967.5 instead of 1968 MHz
I wonder how others work Q100 simplex with these devices