Menu

I have question about R L Mathematics

Search this Thread

Prev

Previous Post

Next Post

Next

#10

Report Post

Old

January 28th 14, 09:21 PM posted to rec.radio.amateur.antenna,sci.electronics.basics

amdx[_3_]

amdx[_3_] is offline

external usenet poster

First recorded activity by RadioBanter: Aug 2013

Posts: 154

Default

I have question about R L Mathematics

On 1/28/2014 1:32 PM, wrote:
In rec.radio.amateur.antenna amdx wrote:
I have beads* on a coax and want to know the R and the L.
I have measured the R at 3.85MHz, It is 3,350 ohms.
I have also measured the phase shift, voltage leading
by 17ns. The period of 3.85Mhz is 260ns.

I want to calculate the impedance of the reactance.

Can anyone solve this for me?
I would like to see the math, because I want to measure again
at 7.5MHz.

My first step was to find the phase angle, 23.5*.
Do we agree there?

Thanks, Mikek

* it is actually a bit more than beads. Years ago, we were sent a box of
ferrite potcores, the cores arrived broken. I slide 42 broke halves onto
a piece of RG59, and now I'm measuring it.

The real resistance should not change with frequency so just measure it
with an ohmmeter.

I'm not sure, it might change with frequency, this is a ferrite around a
wire, so the ohm meter won't work. It's loss in the ferrites.

Total impedance is the square root of the sum of the squares of resistance
and reactance.

The phase angle will tell you if the reactance is inductive or capacitive.

Yup, Eli the Ice man.
Mikek

Reply With Quote

Reply With Quote

Thread Tools	Search this Thread
Show Printable Version	Search this Thread: Advanced Search
Display Modes
Switch to Linear Mode Switch to Hybrid Mode Threaded Mode

Posting Rules
Smilies are On [IMG] code is On HTML code is Off Trackbacks are On Pingbacks are On Refbacks are On

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Differential Equations of Applied Mathematics. Download free several	Takis	Scanner	0	November 30th 07 10:44 AM
Good morning or good evening depending upon your location. I want to ask you the most important question of your life. Your joy or sorrow for all eternity depends upon your answer. The question is: Are you saved? It is not a question of how good	[email protected]	Antenna	0	April 25th 05 03:43 AM
Mathematics and A Theory of Babel (cont)	a.r.e. Gallery	General	0	December 23rd 03 04:38 AM
Mathematics and the Theory of Babel	Eugene	General	3	November 9th 03 05:17 PM
Mathematics and the Theory of Babel	Eugene	General	0	October 20th 03 07:10 PM

All times are GMT +1. The time now is 05:21 AM.

About Us

"It's about Radio"

Contact Us RadioBanter forum home Privacy Statement

Copyright © 2017