My TX antenna is 60ft from my vertical WF and my horizontal WF is at the top of my TX antenna. I am using a Folded Unipole configuration, it is a skirt with 3 wires forming a cage. The skirt detune the tower during RX and help the TX with a huge broad band.
In your case, just open the T disconnecting it from the coaxial cable using a fast vacuum relay. This will to the same as my UNIPOLE. Just keep the T floating during RX. 73 JC N4IS _________________ Topband Reflector Archives - http://www.contesting.com/_topband