> Seems a little less-likely to be the problem, given(?) as well that you have
> fairly consistent (is deterministic overstating it?) behaviour.
Yeah. We've gotten to the point now where enough layered problems have been
cleared away that the remaining behavior is quite deterministic.
> If you wanted to test it by experiment, without having to remove the
> installed Rs, you could test-clip another R in parallel with the 38.4K,
> probably something around 200K, to shorten the 555 period.
Yes; and I think a quick solder tack for that would even be easier to manage
than clips in there. Will give that a go this weekend.
cheers,
--FritzM.
