• on Education & Information
  • Published in issue 6/2013 on page 13
About the article

The Cat’s Whisker

(DesignSpark section)

The Cat’s Whisker
Usually when I start writing an article, for inspiration I look at what’s around on my desk. For this edition of Weird World of Components a Crystal Diode type FRIHO D.R.P. caught my eye. It is mentioned in an old Radio Bauer Katalog from 1926 [1] — we are talking old stuff here — and it is one of the main components of old crystal radio systems.
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