----- Original Message ----- From: "gordon white" <gewhite at crosslink.net> >I have seen a number of "T" cable fittings for the AN/ARC-5 > Apparently can control one receiver from two locations I think Gordon is likely right. In the SCR-183, GF/RU and ATB/ARB, such was used to allow both the pilot and radio op to tune the one receiver. 73 D.S.