Re: 100% positive offset

Plain DC will clump the blood but I highly doubt pulsed DC will or else many of the existing treatments would have caused problems long ago. In any case I have Beck style zappers that are also 10 hertz and 40 hertz, so the add-on full wave rectifier will still keep the hertz within Clark's recommended range (10 hertz being the minimum).
But do remember the Consolidated Annotated Frequency List will list hertz all the way down to 0.2 hertz. As long as the current is pulsed there should be no problem or else many of the frequency lists are dangerous. But this would have been known by now, since they have been used for any years. Many people would have had problems over the years when using the low frequencies. I definitely heard of problems using plain DC though.
Plain DC will clump the blood. Many of the smallest capillaries barely allow a single blood cell to travel through them.