[Radio Wrangler]

Regarding the multiple traces... do a bit of reading-up on synchronising and triggering oscilloscope timebases.

The Miller Transitron style circuit you've shown can be synchronised to an extent, but it is naturally a free-running circuit. It got consigned to the dustbin when triggered timebase designs came along. The triggered timebase was invented by Howard Vollum. He offered the patent to Bill Hewlett and Dave Packard. But they were too busy with government contracts for microwave stuff, so they advised him to set up his own business, and they helped him. He called hs business 'Tektronix' and the rest is history.

What you need id for the timbase run to be started sychronised to the same point on repetitive incoming waveform. If this doesn't work, you get each redrawing of the trance not lining up on top of the last one.

David