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Fixed crystal detector |
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Closed nickel plated
metal housing with screw connection and built-in crystal
and whisker. The whisker can be fixed permanently on a
sensitive point on the crystal. Brownie introduced this
system in 1925. Could be used in a Brownie crystal
receiver or a a crystal receiver of another brand. |
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The original price was 3
shillings. |
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Data |
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Dimensions (l x d): |
5.7 x 1.2 cm |
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Made in: |
1925 |
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Purchased in: |
2013 |
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On the right, an advertertisement in Popular
Wireless, April 9, 1925 |
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| Brownie
advertisement with a number of accessoires (including
the "Note
Magnifier" and the "Permatector") in the
official Calalogue of The National Radio Exhibition, New
Olympia Hall, London, September 4th-18th, 1926 |
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