





©
2008 www.valve-radio.co.uk
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C.
& J. Arrigoni & Co. Ltd
The "Mic-Met" Crystal Detector

A
cats whisker and crystal detector in a glass enclosure with nickel plated
brass fittings. The position of the cats whisker can be altered by turning
the small threaded screw which in turn moves the whisker closer or further
away from the crystal. Both the crystal and the whisker can be removed
from the glass enclosure by unscrewing the larger threaded knurled fittings
either end. The advert, bottom right, is taken from "The Wireless
Constructor" dated December 1924. The advert states the selling price
was 6 shillings if ordered direct from the manufacturer.
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