
Home  Forums  Rules  Articles  diyAudio Store  Gallery  Wiki  Blogs  Register  Donations  FAQ  Calendar  Search  Today's Posts  Mark Forums Read  Search 
Everything Else Anything related to audio / video / electronics etc) BUT remember we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools...... 

Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving 

Thread Tools  Search this Thread 
26th May 2005, 12:12 PM  #1 
diyAudio Member
Join Date: Sep 2001
Location: Pickering, Canada

Anyone major in maths? please correct this
See my calculation here:
L=2.91mH C=68.2pF + 180pF=248.2pF L=2.91mH=0.0291H C=248.2pF=0.0000000002482F Rs=sqrt(L/C) Rs=sqrt(0.0291/0.0000000002482) Rs=sqrt(117244157.937147461) Rs=10827.9341 Cs=[2*pi*sqrt(LC)]/Rs Cs=[2*(22/7)*sqrt(0.0291*0.0000000002482)]/10827.9341 Cs=0.000000000156010404798 If 10^9 = n Then Cs=1.56nF So I get Rs=10k8 Cs=1.56nF Sorry that I have only O level maths and that was grade B I got many many many years ago!!
__________________
The Butcher 
26th May 2005, 12:31 PM  #2  
diyAudio Member

Re: Anyone major in maths? please correct this
Quote:
btw, a scientific calculator makes life a lot easier  and the Texas Instruments version can even talk to your DVM. (I am embarrassed to say that I use an HP41 which is over 20 years old.) four decades ago when I took physics and calculus we had to do this stuff with a book of logarithms and a slide rule. jack 

26th May 2005, 12:42 PM  #3  
diyAudio Member
Join Date: Aug 2004
Location: Behind you

Re: Re: Anyone major in maths? please correct this
Quote:
I have a notsoold TI86 myself, although I never use it anymore, instead preferring to use 'Virtual TI' (a TI calc emulator for Windows), since it is far faster than any real calculator.
__________________
https://mrevil.asvachin.eu/ 

26th May 2005, 08:36 PM  #4  
frugalphile(tm)
diyAudio Moderator

Re: Re: Anyone major in maths? please correct this
Quote:
My HP is virtual these days (althou i have a rarely used HP (maybe 15 years old) somewhere in the lab  needs fresh batteries) dave
__________________
community sites tlinespeakers.org, frugalhorn.com, frugalphile.com ........ commercial site planet10HiFi p10hifi forum here at diyA 

26th May 2005, 09:08 PM  #5 
diyAudio Member

I told my kids I had to get an RPN calculator as my mom is Polish. I used to program little magnetic tapes  worked out the tractrix horn formula in RPN.

26th May 2005, 09:29 PM  #6  
frugalphile(tm)
diyAudio Moderator

Quote:
dave
__________________
community sites tlinespeakers.org, frugalhorn.com, frugalphile.com ........ commercial site planet10HiFi p10hifi forum here at diyA 

27th May 2005, 10:44 AM  #7 
diyAudio Member
Join Date: Feb 2005
Location: nr LongHope, Glos. UK

RPN
I am an RPN addict and simply cannot use anything else than an RPN. And I use my trusty HP32SII because it's awake INSTANTLY when I need it; I do not have to PLEASE WAIT for anything to get it's act together.
__________________
At Spes Infracta __________________ 
27th May 2005, 12:47 PM  #8  
diyAudio Member

Re: Re: Re: Anyone major in maths? please correct this
Quote:
I can beat that. 1978 Casio fx451 scientific calculator with Solar Cell  27 years of calculation with zero batteries  and I have two of them! Jan Didden
__________________
Whether we like to think of it this way or not, an audio engineer shares the professional goal of a magician  Richard Heyser Linear Audio Vol 12 is out! Check out my Autoranger and SilentSwitcher 

Thread Tools  Search this Thread 


Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Maths ....???  Bluto  MultiWay  31  4th March 2008 06:28 PM 
maths  Notagenius  The Lounge  0  12th October 2007 08:42 AM 
Maths help :(  shudster  MultiWay  7  28th January 2006 08:36 PM 
T/S + Maths = Help!!!  Higo  MultiWay  3  28th August 2003 12:44 AM 
New To Site?  Need Help? 