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KF7PSM > TECH 29.12.18 16:33l 14 Lines 492 Bytes #999 (0) @ WW
BID : 16579_KE0GB
Read: DK3UZ DF7EAV GUEST DL9YCC DK3HG OE7FMI
Subj: Color Of Motor Windings and Transformers
Path: DB0FHN<DB0PM<OE2XZR<OE5XBL<F1OYP<ON0AR<SV1CMG<SR1BSZ<IV3SCP<IZ3LSV<
IW8PGT<LU4ECL<CT2KCK<KE0GB
Sent: 181229/1522Z 16579@KE0GB.#SECO.CO.USA.NOAM LinBPQ6.0.17
I was reading om G8MNY's bulletin about his hammer drill charger and
was interested in that he said that by painting the transformer windings
black with a felt pen it increased the heat dissipation by 10%. I found
this interesting information online:
https://www.usbr.gov/power/data/fist/fist3_7/vol3-7.pdf
PAINTING OF TRANSFORMERS AND
CIRCUIT BREAKERS
They paper reports studies with different colors and paints. Very very
interesting, maybe I can get my 20A power supply to push 22!
73
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