Today, I checked v50.2 and v66.4 after putting my T41's back together. Both versions have a 33-45MHz oscillation at the higher bands. Ihave pretty low isolation PA Out to PA In at those frequencies on the12-6 meter bands. I am thinking that I must have a hardware issuesince I am not getting the isolation numbers that Oliver posted. I'mgoing to set this aside for a while.dave, n3dsLinks:------[1] /g/SoftwareControlledHamRadio/message/33281[2] /mt/111852470/243852[3] /g/SoftwareControlledHamRadio/post[4] /g/SoftwareControlledHamRadio/editsub/243852[5]/g/SoftwareControlledHamRadio/leave/10484476/243852/1943518115/xyzzy