[ARC5] Strange problem with racked transmitters

[J Mcvey via ARC5]

Both transmitters work well, but one seemed to draw too much current (not due  a resonance problem). Upon further investigation , I discovered that the "deselected" transmitter 1625's were conducting somehow while it's supposed to be inert. I proved this by leaving the offending transmitter docked with the finals removed. the problem went away. Tried a new set of 1625s but they also conducted while in standby. The select relay is OK ( both contacts open in standby). The other transmitter does not do this. There isn't much there to go wrong, other than what I have already explored.

Any suggestions?