Steve & ALL. A little tentec enclosure houses my push to talk PTT switch for my Omni & Herc/Titan. IT HAS A TT LOGO with a RED LED for the red dot !!! Drilled out the orange and inserted the led. It's my transmit indicator. I wanted something to glow red on transmit. Bill Steve Ellington wrote: >I've got the TX-100 transmitter. The dot in the center of the TT symbol has >a BULB.