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KF5JRV > TECT 15.12.16 14:36l 5 Lines 620 Bytes #999 (0) @ WW
BID : 7020_KF5JRV
Read: DK3UZ GUEST DF7EAV OE7FMI
Subj: Weston Electrical Instrument Co
Path: DB0FHN<OE2XZR<DB0PM<OE5XBL<F1OYP<IZ3LSV<IK6ZDE<VE2PKT<XE1FH<N9PMO<
NS2B<KF5JRV
Sent: 161215/1215Z 7020@KF5JRV.#NWAR.AR.USA.NA BPQ6.0.13
The Weston Electrical Instrument Company was founded in 1888 and immediately started selling a moving-coil DC millivoltmeter of Weston's design. Weston meters immediately became the world standard for accuracy, a status they held for much of the 20th century. Weston DC ammeters were available by 1894. Weston's AC meters were perfected and ready for production by 1891. By 1893 Weston had developed and was using the alloy Manganin for the series resistance coils in voltmeters, which has essentially zero temperature coefficient for resistance. This allowed greater precision.
73 Scott KF5JRV
KF5JRV.#NWAR.AR.USA.NA
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