[Lowfer] MHz and mHz
Ed Phillips
[email protected]
Wed, 09 Jan 2002 16:50:54 -0800
Don Davis wrote:
>
> Hi Ed:
>
> Was just "funning" you there.
You better be careful when you make fun of a man's "religion". Hi.
> Yes, your explanation makes a lot of sense.
> I also have a problem with Metrics-for-metrics sake. Having gone through
> years and years of technical electronics and training and then getting an EE
> degree, I had the unhappy task of unlearning "electron" flow and replacing
> it with "conventional" current flow. It's no wonder techs and EEs don't get
> along - hi. Also took a lot of classical physics using the Sears series of
> books - had problems and text in both metric / English /SI etc. Got fairly
> good working problems in any units and then translating back to something I
> undersatnd. There was a big push in the 70s and 80s in the US to go 100%
> metric, and at one time all gov't contracts had to be in metric only, then
> they allowed metric/English, now only some divisions of NASA and a couple
> other obscure agencies require anything to be specified in metric. Present
> trend seems to be "...we just want the sytem / part / etc. to work, and you
> figure out how to do the drawings and documentation..." Fortunately,
> everything I have to produce is in good old inches and pounds.
>
> 73s
>
> Don Davis AD6PB
There are other manifestations of unit madness. When I started out in
EE school at University of Missouri in 1942 we had teachers using every
imaginable system of magnetic units, and it turns out there are quite a
few. CGS, MKS, MKS rationalized, english, etc. As a result I have
terrible problems designing magnetic circuits now. I have a couple of
very old books I refer to which get me started, and there are a number
of conversion tables available.
Ed