I am Trying to make a training tool that lights up when a radio is transmitting a few inches away from the antenna. The circuit works great on my bread board, but as soon as I transfer it to a pref board it does not work. I have tested the circuit and I have good connections at all points. I used my Precision Variable DC Power Supply to apply 1.8V and it lights up just fine across the circuit. Any advice now to make this work? basic skill level here, but lots of resources available. Thank you.