If you don't have MIL-STD-806, Timely Templates are still sold.
This link shows those templates with the size relationships:

http://www.timelytemplates.com/f_electric/Telectric.htm


Gary

-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Gary
Ferrari
Sent: Friday, July 21, 2006 10:08 AM
To: [log in to unmask]
Subject: Re: [DC] Schematic symbols

If you have an old MIL-STD-806, it should show the size relationships
between the various symbols.



Matthew Lamkin wrote:
> Looking at BS3939 part 1/EN60617/IEC617 it says something along the lines
of
>
> The symbols in this standard have been drawn to a size convenient for
comprehension etc about matching sizes.
>
> Basically they should be of adequate size for someone to be able to read
them clearly.
>
> Now if you have the slightest possibility of someone who is optically
challenged looking at them
> then it's obvious to make them "big".
> I couldn't see a std disagreeing with that as there could be disability
discrimination against it - lol.
>
> Matthew.
> -----Original Message-----
> From: DesignerCouncil [mailto:[log in to unmask]]On Behalf Of
> Donald Kyle
> Sent: Friday, July 21, 2006 1:41 PM
> To: [log in to unmask]
> Subject: [DC] Schematic symbols
>
>
> Good morning,
> does anyone know of a Mil spec, ANSI or IEEE standard that describes
> the size of schematic symbols, spacing of symbols, text and so on?
>
> Thanks
>
>
> Donald Kyle C.I.D.+
>
>
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