Radio throttles were a success Now on to keep alive

Finally after all these years I had a good radio day.

Now I must go on to new challenges. I think I’ll try and figure out this “keep alive” or whatever it is called these days. I ordered a few different types of keep alive capacitors for trying out on various situations. They come in many sizes and power levels. Now to figure out how they work and if they can be interchanged with other brands of decoders.