Hi all,

As discussed a few times in #drakelist on IRC over the past few days,
I have a TR-4 ("B" era) with a circuit hanging off the PTO that I
don't really grok.  I've put up a web page with some photos and a
discussion of the circuit as I understand it here:

    http://kb8ojh.net/misc/TR-4-PTO/

I've heard two plausible theories for what this circuit is, but both
theories have holes (admitted by their authors).  It's always possible
that the circuit was built wrong, or that I have captured it wrong,
and one of these theories is still correct.  I'll leave those theories
out for just now, to avoid tainting anyone's creative process.

I'm curious to hear what others think it may be.

Ethan

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