Clive,
Thanks, I'll sure do it. The formulas we use are always printed in texts
in metric measurement. I use inch but have converted everything. The book
would show them in metric but the conversion also. I have bought several
books (15-20 now) from present to years back (1919 I think) on transformers
and magnetics researching the topic. Read everyone of them, and that was a
chore in itself. It was supprising on how much some left out. In reality, there
was only 1-2 good ones out of the bunch. It's kind of like this was a craft
they wanted to keep everyone blind to for some reason. There's a lot of
mis-information on the net too. One website I'll mention called "Roll Your Own
Transformers", was way off when they were talking about sizing a core. They
didn't discuss any options in selecting the core material or the actual math
you had to use to get there, and the turns per volt. The way I took it, they
were guesstimating it. I'm not knocking them but saying I dont think the author
had access to the correct materials. You also have to watch in the real old
texts back in the 1900's-1930 that there was "aging" of the iron in
transformers which now no longer exsists due to the advances in steel and iron.
All the alloys weren't developed then either. The thing is, the really old
books told more formula wise than anything new like it was a lost art or s
omething. The most they mentioned was the basic formula of NP = NS for the
turns ratio. They never said how to figure turns per volt and determine the
core size, just very basic elementary stuff. The one I'm wanting to do is a
tell-all type with examples. I actually started it last week but I've felt
under the weather from a fall I had here at home. I stove myself up pretty good
and am taking Percocets to live with it now. Maybe next week I can start on it
again. It will most likely be a while before it's done but I'll sure put you
down for a copy.
Best,
Will
>*********** REPLY SEPARATOR ***********
>
>On 3/6/05 at 4:21 PM CLIVE COLLINS wrote:
>Good day Will,
>Regarding the book that you propose, mark me down for a copy please as and
>when.
>
>Regarding the ARRL and FCC, we have a similar state of affairs over here
>in that costs are now stupid and the only people who get anything out of
>the RSGB are those who (a) are newcomers and dont know about the history
>of the outfit and (b) those who can afford the membership fee and dont
>expect to get anything out of it.
>I gave up my membership a long while back as the slant was towards
>children and then CB types who had no interest in the technical side of
>the hobby.
>Understand me please, I have nothing against children being encouraged to
>join in the hobby but there is a limit to the lower level ofintelligence
>that you can offer a society to and the RSGB went far below it. It became
>just a publication that was read for the advertisements and any technical
>articles were lost in jargon and mindless rubbish.
>This faces now an argument as to why I see this happening. Either I am
>becoming too advanced in years to be patient with the newcomer (I dont
>think so, I was one m,yself not so long ago) or standards have shifted and
>generally the world does not cater for the older engineer any more.
>I should have retired about five years back but instead, I started another
>business and I have never been so busy so I must be doing something right.
>I think that these days the attitude of the retailers has a loit to do
>with the demise of the in-depth interest in the hobby. "Just bring wads
>of cash or a cheque book and we will supply you with a transceiver that
>will do all the work for you "
>If it causes TVI then it will shut down and write a letter of apology to
>the neighbour and the controlling authority and send your licence back for
>stamping as a nuisance to the community !
>
>It is all a case of money these days and no one who has the background of
>a "poor amateur" gets a look in. One law for the rich, one for the poor.
>
>Thanks for letting ME sound off.
>Kindest regards and all good wishes from the UK
>
>Clive GW3WEQ
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