mho conductance

[cornytheclown]

When is the unit of the mho used in practical applications ??? I know
what a mho is but I have never seen any real world references to it
being used in electronics.

I recently saw some sort of tester at a flea market that had an
indicator light and a rotary switch which had different ranges for
different ranges of mhos. The device had an inch diameter inch deep
"socket" with two round contacts in the bottom. The owner/seller could
offer no explanation....I would have bought it and took it apart but
never got back to that particular table .

 

[Active8]

On 13 Nov 2004 17:18:57 -0800, cornytheclown wrote:

When is the unit of the mho used in practical applications ??? I know
what a mho is but I have never seen any real world references to it
being used in electronics.

I forget what all uses it has, but 2 come to mind.

1. the transconductance of a transistor.

2. When a circuit is convieniently drawn/analysed as a collection of
components in parallel (like a parallel equivalent circuit or one
that really is that way) it's easier to add admittances rather than
calculating parallel impedances. Admittance is real conductance in
parallel with imaginary (reactive) susceptance. So you add the
parallel conductances and invert to get equiv series resistance...
stuff like that.
<snip>
--
Best Regards,
Mike

 

[Barney]

"cornytheclown" <cornytheclown@hotmail.com> wrote in message
news:8e8f59d4.0411131718.4ae9b611@posting.google.com...

When is the unit of the mho used in practical applications ??? I know
what a mho is but I have never seen any real world references to it
being used in electronics.

I recently saw some sort of tester at a flea market that had an
indicator light and a rotary switch which had different ranges for
different ranges of mhos. The device had an inch diameter inch deep
"socket" with two round contacts in the bottom. The owner/seller could
offer no explanation....I would have bought it and took it apart but
never got back to that particular table .

It was the unit of conductance (in my day - which a little while ago!), and
I think it is now called a 'Siemens'.