Thanks so far.? I have cleaned and verified that the Attenuation switch is clean and working as it should.? Further research inside the equipment and the internet I find that the RF board in my FT101Z is not the one detailed in the handbook which came with the equipment.? The handbook has circuit etc for RF Board PB1960A while the installed board is PB2154.? I have searched the internet to find the circuit diagram for PB2154 without success.? Without this I am to a great extent working blind.? If anyone has a circuit for 'my' board I would appreciate a copy ( the workshop manual I have found refers to 'my' board but has no circuit)? Also any further ideas of where the fault may be would be appreciated.? Thanks again.? Alistair GM4ENF
Alistair GM4ENF