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variacs
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To: tesla-at-grendel.objinc-dot-com
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Subject: variacs
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From: jim.fosse-at-genie-dot-com
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Date: Sat, 20 Jan 96 04:46:00 UTC 0000
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lost the quoted text about 400Hz variacs:(
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Chip,
to quote from _High Frequency Apparatus_ Thomas Stanley Curtis
reprinted by Lindsay Publications Inc. A chapter describes how to wind you
own 3Kv 500 watt step up transformer for use off lighting mains.
Page 87 (one-half kilowatt transformer outfit) Figure 3-Data for primay
winding:
"Primary data for 110 volts 25~" (~ was used for cycles per second jim)
"463 turns #14 D.C.C 60~ 237 turns # 14 D.C.C 125~ 125 turns #14 D.C.C
for 220 volts use twice as many of #17 D.C.C"
The core is the same size for all. If we extrapolate: 400~,opps 400Hz, needs
35.6 turns based on the 60Hz turns ratio, or you 400Hz xformer could be run
on 110v * (60hz/400hz) = 16.5 volts.
jim