Re: gEDA-user: C++ HDL

[John Doty <jpd@xxxxxxxxx>]

On May 15, 2009, at 5:13 PM, Dan McMahill wrote:

> John Doty wrote:
>>>> So will the 6L6, but few engineers ever have reason to design with
>>>> one.
>>>>
>>> However, those who do make oodles of money. Audio freaks seem to  
>>> have
>>> pockets of infinite depths.
>>
>> Sure, but so what? There's no need to train the average EE to do this
>> work.
>
> this thread has degenerated a bunch, but.... I would argue that the
> average EE *should* be able to design with a 6L6.  Actually, maybe
> something like a 12AX7 (triode) would be better.  Why do I say such a
> crazy thing?  Because if a school has done a decent job with its
> undergrad program than you should be able to go to an engineer with no
> experience using vacuum tubes, hand him/her the appendix from Gray and
> Searle that does a basic derivation of a triode operation, hand him/ 
> her
> a datasheet and a schematic and they should be able to right away
> analyze the circuit and tell you what it is and the basics of its
> performance.  A small signal model is a small signal model.  If you've
> drawn a load line the exact device at hand shouldn't matter.  If you
> understand the idea, the specifics are just that.  Details.  Minutia
> that can be relegated to a cheat sheet (brain swap space).

Yep. You have to teach them to learn, not the specifics of every  
technology.

>
> That's the difference between a principles based program and an
> applications/memorization based program.

Back when I was on the staff at MIT, I used to supervise  
undergraduate research projects and theses in both EECS and physics.  
One of my students went to work for Tektronix after graduation. He'd  
worked with CCD's in my lab, and Tek hired him to develop CCD's as  
targets in extremely fast CRT scopes. However, he was a quick study  
and within a few months had become an expert on electron optics and  
extremely broadband deflection structures. Much trickier than load  
lines...

John Doty              Noqsi Aerospace, Ltd.
http://www.noqsi.com/
jpd@xxxxxxxxx




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