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From: liz@poppyrecords.invalid.invalid (Liz Tuddenham)
Newsgroups: sci.electronics.design
Subject: Re: LT Spice looks
Date: Thu, 14 Nov 2024 17:01:08 +0000
Organization: Poppy Records
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john larkin <JL@gct.com> wrote:

> On Thu, 14 Nov 2024 15:30:32 +0000, liz@poppyrecords.invalid.invalid
> (Liz Tuddenham) wrote:
> 
> >john larkin <JL@gct.com> wrote:
> >
> >> On Thu, 14 Nov 2024 08:54:02 +0000, liz@poppyrecords.invalid.invalid
> >> (Liz Tuddenham) wrote:
> >> 
> >> >Edward Rawde <invalid@invalid.invalid> wrote:
> >> >
> >> >[...]
> >> >> 
> >> >> If the netlist and PCB layout is correct then why waste time on
> >> >> making the schematic look like you want it, only to be told by
> >> >> someone else that they would have drawn it completely differently?
> >> >
> >> >If you were a service engineer with the customer breathing down your
> >> >neck, which diagram would you prefer, 'A' or 'B' ?
> >> >
> >> >http://www.poppyrecords.co.uk/other/CircuitDiagrams.gif
> >> 
> >> They are both wrong.
> >
> >Do you mean they wouldn't work or do you mean they aren't drawn to some
> >arbitrary standard?
> 
> Won't work. The batteries are backwards.

It depends which battery convention you use, there doesn't seem to be a
standard which is universally accepted. 

As a footnote, some transistors have enough gain int the reverse
direction to make the circuit function, after a fashion, from either
polarity.  When I worked as a tester on a production line, we were
puzzled by the audio stages of some of the receivers working below spec.
Everything seemed all right except the high frequency response was below
the test limits.  Eventually I tracked it down to one of the transistors
being put in backwards by the girls making the boards.


-- 
~ Liz Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk