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Old 4th Feb 2016, 7:24 pm   #26
BottleMan
Tetrode
 
Join Date: Mar 2015
Location: Ashford, Kent, UK.
Posts: 93
Default Re: ♩ I'm going slightly mad... ♩ Transistor Craziness!

Quote:
Originally Posted by Radio Wrangler View Post
Designed by someone who didn't quite make the changeover from Germanium?
I'm working on a Plessey PR155 receiver that consists of modules designed by separate teams (well, it seems like it). The front end transistor is a germanium PNP, the rest are a mixture of plastic and TO-18 silicon NPNs, the power supply uses OCs, there's a 7490 divide by ten and it all works off a -15V supply rail! Sympathetic murmurings would be appreciated.

Graham
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