20 photo transistors

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20 photo transistors

Postby Harry Dalek » Sat Dec 27, 2014 5:46 pm

Theses old photo transistors are for sale on ebay i did buy one lot to experiment with ,very cheap well worth buying.

http://www.ebay.com.au/itm/SP201-PhotoT ... 3a7e9f848c
The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.
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Harry Dalek
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