[ICOM] 706mk2 with ah2 tuner?

[asharki at adelphia.net]

hi to the group,
have a 706mk2 and a ah2 tuner and would like to know if these two are compatible. manual on 706 says to use ah3 or ah4. the tuner plug on the back of the 706 matches the tuner but been told better not do it. called ICOM and the tech support could not answer!! i think someone on this reflector addressed this question but didn't go into details. any info? no schematic for the radio so don't know what data is on the connector to match it to the tuner. the tuner and control head came with a ic735. thanks
tony-wb2dtw