Original poster: Bert Hickman <bert.hickman@xxxxxxxxxx>
Tesla list wrote:
Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>
Hi All,
I tried my experiment and found something very odd!!
I was running small streamers (~8 inches) here in the basement off a
sharp tip on the terminal.
The 1, 2, 3... pulse thing did not seem too interesting. After about 5
to 10 pulse the streamers seem to reach a maximum level. After that they
just last longer but their length does not increase....
But one thing that certainly did get my attention was this.
After about 400 BPS and certainly from 600 - 1000 BPS the streamer length
"cyclically" goes from a small brushy discharge to a long single streamer
as a function of BPS. Sort of like this:
500BPS = short sparks
550BPS = long single arc
600 BPS = short sparks
700 BPS = long single arc
.
.
.
Sounds like you might be getting an interaction with the line frequency
due to bus sagging/recovery versus line phase. If the rail voltage is
sagging and partially recovering due to periodic recharging from the
incoming 60 Hz line, you may see an aliasing effect that shows up every
half cycle of line voltage. If this was occurring, you'd expect to get
smaller sparks when the bus voltage sags significantly without getting
recharged by the next rising line voltage haversine. By increasing the
break rate by another 30 BPS or so, you' then "catch" the next rising AC
input haversine, the rail voltage recovery then provides a growing output
RF voltage envelope towards the end of the pulse train (and thus longer
streamers). Amazing that you are seeing such a large effect. though - look
at your rail voltages versus burst phasing...
-- Bert --
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