John Larkin wrote:
On Sun, 05 Sep 2010 08:57:03 -0700, Fred Abse
wrote:

On Sat, 04 Sep 2010 07:56:51 +0100, Eeyore wrote:

Do please especially explain the relevance of the letter Q to indicate a
transistor or U for an IC.
No sillier than "L" for inductance, or "Z" for impedance, or "Y" for
admittance, or "B" for susceptance, or "G" for conductance.


I've actually seen schematics that used CHO for inductor, RLY for
relay, LED for LED, POT or RV for a variable resistor, BR for a
rectifier, CON for a connector. Audio, of course. Schematics that use
such designators are invariably amateur crap circuits in their own
right. They generally use the dreadful "4K7" thing too.

John

Not happy with posting it once ?