Amps
[Top] [All Lists]

[AMPS] Pi-Net math

To: <amps@contesting.com>
Subject: [AMPS] Pi-Net math
From: wc6w@juno.com (Radio WC6W)
Date: Wed, 04 Aug 1999 10:31:20 EDT

On Wed, 4 Aug 1999 04:39:07 -0700 Rich Measures <measures@vc.net> writes:

>?   RL = 2000 ohms.  R out equals 50-ohms.  Freq = 7.00MHz.  Q = 10  
>Therefore, C1 = 2000 ohms/10 = 200 ohms.  From calculation, C1 = 114pF, 
>C2 = 562pF, L = 5.06uH.   Since C1 is effectively in series with C2, 
>C-net = 94.8pF.  The resonant freq. of 5.06uH in parallel with 94.8pF is

>7.266MHz.  
>
>-  cheers, Tom
>

Hi Rich,
   You didn't detail the formulas you used for L & C2 but, from your C1
calculation, I note that you are using the classic "time-dishonored"
approximation which is close enough for amateur work (as long as the Q is
reasonably high) though, certainly not mathematically precise to support
the argument du jour.  :-)

73,
   Marv  WC6W







*

___________________________________________________________________
Get the Internet just the way you want it.
Free software, free e-mail, and free Internet access for a month!
Try Juno Web: http://dl.www.juno.com/dynoget/tagj.

--
FAQ on WWW:               http://www.contesting.com/ampfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm


<Prev in Thread] Current Thread [Next in Thread>