Yes I get it. 6 volts is not enough. 22 volts works. For the FCC pin I am o Lynn maestri g about 3 volts. That does seem right.
I switched out the 4 AA batteries with a 12 volt sealed battery used in depth finders and other electronics.
I guess I am not getting it. If 6 volts doesnt light up the board how does putting diodes in series help? Foesnt it drop the voltage even more?