[Lowfer] Small loop calculator

[Paul Daulton]

In the Editors and Engineers Handbook there was an antenna called the Dual
 Discontinuity Ring Radiator. It had two loops separated by a few feet,
bottom loop was closed top loop broken at feed point. Top loop fed with
 matching stub. Makes a compact loop for 80m I never calculated one for
505khz. Both loops are horizontal which makes the ant vertically
 polorized( polarization is perpindicular to the plane of the loop). If
 anyone is interested I will try to find that handbook.
Are you installing the  loop in the horizontal plane?
It will be neat to have a station on in AK to listen for.
PAUL DAULTON 
k5wms at aristotle.net 
Beacon WMS qrss 30/slow 187.492 khz 24/7 
EM34wu 
Jacksonville, AR USA
-----Original Message-----
From: Laurence BY3A-KL1X China <hellozerohellozero at hotmail.com>
Sent: Fri, 5 Jun 2009 22:38:50 -0800
To: <lowfer at mailman.qth.net> 
Subject: [Lowfer] Small loop calculator
 
 
 
 
 
If been trying to calculate what sort of Voltages and impedances Im going
 to be faced with on my LF/MF loop in Alaska at 505-510kHz compared to
 137khz and been fiddling with the values of  
 
length diameter, capacitor values and voltages...  
 
 
 
http://www.66pacific.com/calculators/small_tx_loop_calc.aspx  
 
 
 
Im not sure given the real world of heights, ground permitivity, true
 conductor/skin whether it holds thru but plumbing in the figures for past
 oprations, in order of values it appears to give rationale figures. In
 all cases it tells me to keep the length less that 0,25Y...  
 
 
 
Other good educational reading and the politicking of when a small becomes
 intermediate or large, and some good telling graphs on the links below.  
 
 
 
http://personal.ee.surrey.ac.uk/Personal/D.Jefferies/loop.html and  
 
http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=15200  
 
 
 
 
 
Anyone have any novel methods of feeding say a 470ft circumference loop at
 505khz down to coax in the end welcomed....  
 
 
 
Laurence WE2XPQ as of next week...  
 
BP51 Wasilla AK  
 
 
 
Presently OM89UA China.  
 
 
 
_________________________________________________________________  
Windows Live™ SkyDrive™: Get 25 GB of free online storage.  
http://windowslive.com/online/skydrive?ocid=TXT_TAGLM_WL_SD_25GB_062009  
______________________________________________________________  
Lowfer mailing list  
Home: http://mailman.qth.net/mailman/listinfo/lowfer  
Help: http://mailman.qth.net/mmfaq.htm  
Post: mailto:Lowfer at mailman.qth.net  
 
This list hosted by: http://www.qsl.net  
Please help support this email list: http://www.qsl.net/donate.html