Original poster: "Kurt Schraner" <k.schraner@xxxxxxxxxxx> Tesla list wrote:
Original poster: Ed Phillips <evp@xxxxxxxxxxx> Hi Dr., been there, done that, when a newbie coiler. See: http://home.datacomm.ch/k.schraner/pcb_cap.htm
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Kurt "
Did I guess from the German language part that the board
thickness was 1.55 mm? You seem to have gotten more capacitance per
plate than I did with the same material so I'm going to have to find
my original data and check it. (Written in pencil on one of the
plates I tested.) Did you ever measure the dissipation factor at
your operating frequency?
Ed
Hi Ed,your guess about the 1.55mm is right. To measure the dissipation factor at operating frequency I don't own the equipment. But at 1kHz it's about d=0.006..0.008 (Q=149..120) and at 120Hz it's d=0.003..0.003(Q=165..260), by my LCR meter. Verified the capacitance about being 1.044..1.1nF for a size of the plates of about 25.5 x 14cm copper.
Best regards, Kurt