for me all math formulas are impossible to follow for the most part.
----- Original Message -----
From: "Mike Cozzolino" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, January 17, 2012 12:38 PM
Subject: Re: requesting help with math question
> hi scott, the 159 is a constant, just like pi. its just part of the
> formula. but it is always 159. i have seen other formulas that do
> the same thing but some are very confusing and are way to hard to
> work with. c u 73 mike w6quv
>
>
>
> At 02:59 AM 1/17/2012, you wrote:
>>Mike,
>>
>>I see how this works, but one question is where does the 159 come from? =
>>Just curious and hey if it works that is fine by me. Any other tips? =
>>grin
>>Like I said, math is my weakness and something I have always wanted to =
>>understand. I used to be afraid of math which seems pretty silly, but I =
>>really find the subject fascinating now and wish I had the same attitude =
>>when I was younger. I'm not really sure where I went wrong in my study =
>>of math and why I never learn to appreciate the value of subjects like =
>>algebra. Probably just did not have the right teachers when I was young =
>>and impressionable. grin
>>
>>73
>>Scott/N3BYY
>>On Jan 17, 2012, at 12:20 AM, Mike Cozzolino wrote:
>>
>> > hello scott, i tried to follow your formula, but the way you wrote
>> > it=20=
>>
>> > i couldn't follow it. anyway scott, why don't you use the formula
>> > >>=20=
>>
>> > f=3D159 over the square root of l times c <<. first you multiply the =
>>l=20
>> > times c and then you get the square root of that answer. then you=20
>> > take the 159 and devide that by your answer. the answer i got
>> > using=20=
>>
>> > the values you gave, 50 microhenries and 200 pico farads was 1.59.
>> > i=20=
>>
>> > left the values at their original values picos and=20
>> > microhenries. thats the formula i always use for resonance of a=20
>> > tuned circuit. 73 bl c u mike w6quv
>> >=20
>> >=20
>> >=20
>> > At 07:06 AM 1/16/2012, you wrote:
>> >> All,
>> >>=20
>> >> Ok, I'm studying away here and trying to master the material for the =
>>=3D
>> >> Extra class exam. I have to admit that my math skills are not the =
>>best, =3D
>> >> but in my defense I have not done such fun stuff when in school and
>> >> =3D=
>>
>> >> certainly never took much algebra. So, I'm admitting my mathematical
>> >> =
>>=3D
>> >> ignorance here and asking for a little mercy. grin
>> >> I want to understand how best to work out these problems because =3D
>> >> remembering the answers is probably almost as much work. grin
>> >> So, here is the question and this is dealing with resonance.
>> >> The forumla f sub r =3D3D r squared times l squared.
>> >> So, f is the resonant frequency and I got that and that is what I =
>>need =3D
>> >> to solve for.
>> >> So, r is 50 micro henrys and l is 200 pico farads.
>> >> I understand that I need to convert micro henrys to henrys and pico
>> >> =3D=
>>
>> >> farads to farads. I gather multiplying 50 times 10 to minus 6 gets =
>>the =3D
>> >> job done and doing this on a calculator would be 50 times 10 (press =
>>the =3D
>> >> x y button) -6.
>> >> You would do the same for converting pico farads to farads.
>> >> However, at this point I'm not quite sure how to work out the rest =
>>and =3D
>> >> of course entering this into a scientific calculator is really =
>>important =3D
>> >> and would make the process a bit easier.
>> >> I realize the end result will be an answer that is in megahertz. If
>> >> =3D=
>>
>> >> anyone could help with this I would really appreciate it. The =
>>electrical =3D
>> >> theory portion of the exam is going to be the difficult part for me. =
>>=3D
>> >> RUles etc. no problem, but this stuff which I'm sure is going to be a
>> >> =
>>=3D
>> >> big part of the exam is going to be the make or break for me.
>> >>=20
>> >> thanks,
>> >> 73
>> >> Scott/N3BYY=3D
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