Re: why aren't electronics schematics trade secrets?

[Rich Grise]

On Thu, 02 Dec 2004 22:20:34 -0500, Barry Margolin wrote:

> In article <Xns95B3F395E45C786336@130.133.1.4>,
>  Roger Johansson <no-email@home.se> wrote:
> 
>> Dan Jacobson <jidanni@jidanni.org> wrote:
>> 
>> > Just curious why electronics schematics aren't closely guarded trade
>> > secrets. Is it because the hard part is making the parts, not
>> > stringing them together?
>> 
>> At least 97% of the production use very common circuit solutions,
>> usually copied directly from from the application notes from the
>> manufacturer.
> 
> Anyone remember the days before VLSI took over (60's and 70's), when the
> manual for just about every electronic device included a wiring diagram? I
> remember seeing this in televisions, transistor radios, and even some
> early calculators.

I remember forty or so years ago, we got a stereo and the schematic was
actually pasted on the inside of the cabinet, right alongside the tube
chart. The only tube types I remember seeing are 12AX7. ;-)

Cheers!
Rich