Like a fool, I agreed to convert someone's scribble into a nice 
schematic drawing.  

How difficult could it be to conjour up some valve diagrams for my CAD 
program? A couple of Pentodes, Heptodes, Dual Pentodes, Diodes, 
Triodes later, I then realised , oops, some of these dual parts share 
a grid, others don't, some have a dual cathode, others don't, one is a 
diode with pentode, another is a pentode with dual diode.

 I think it probably took F.W. Cam, less time to draw a complete 
magazine's worth in 1920, than it has me drawign parts for a 21st 
century schematic program.

If I'm ever able to pay the exorbitant price a certain IUM cad 
manufacturer charges, I'll expect it to have a complete set of valve 
parts included, then it'd be worth the money!

Colin

(F W Cam invented Practical Wireless magazine before it was PW)
http://cgi.ebay.co.uk/Vintage-Practical-Wireless-Magazine-January-1947
_W0QQitemZ290242631158QQihZ019QQcategoryZ934QQcmdZViewItem
--
cdb,  on 12/07/2008



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