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JacKam_ · 17th Jul 2017, 11:46 am

After over 40 years of tinkering I asked myself why Transistors on PCBs and circuit diagrams have often prefix "Q".

"L" stands for Lentz. It is easier to read L112 than I112.

"U" for ICs is "unspecified" or "unrepairable" [Althought I always thought it is from "Uklad scalony" (Pol) == "integrated circuit" (Eng)]
But I am not sure.

Regarding Transistors, I found the picture below, is that all ?

J

17th Jul 2017, 11:46 am	#1
JacKam_ Pentode Join Date: Jul 2015 Location: Newbury, Berkshire, UK. Posts: 243	Lesson R,L,C,T,V,D but Q and U ? After over 40 years of tinkering I asked myself why Transistors on PCBs and circuit diagrams have often prefix "Q". "L" stands for Lentz. It is easier to read L112 than I112. "U" for ICs is "unspecified" or "unrepairable" [Althought I always thought it is from "Uklad scalony" (Pol) == "integrated circuit" (Eng)] But I am not sure. Regarding Transistors, I found the picture below, is that all ? J Attached Thumbnails Last edited by JacKam_; 17th Jul 2017 at 12:00 pm.