Original poster: "S&JY" <youngsters@xxxxxxxxxxxxxxx>
Gerry,
Like you say, the series connected primaries force the secondaries to stay
about 180 degrees out of phase with each other and at the same frequency.
Once the secondaries have discharged and are ringing down, they probably do
exhibit relative phase shift, although there is still some fairly strong
electrostatic coupling between the two top loads until the voltage dies off.
But so what if their phase wanders during the last part of their ring-down.
The next "bang" from the primary jolts them back into the proper phase to
unleash connecting leaders again.
--Steve Y.