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Build a Magnetic Loop?

BenMara

W9WDX Amateur Radio Club Member
Jan 16, 2013
113
15
28
SC swamplands
Recently watched this vid. Now im thinking about adding a magnetic loop to my antenna arsenal (farm).


What do yall think?

Current antennas are Hexbeam (20-10m), (OMTA) Offset Multiband Trapless Antenna (vertical 40-10m) and 80m wire fed with window line (50' above ground at feedpoint).
 
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2RT307

Sr. Member
Nov 22, 2011
2,325
791
223
Texas
I'm with sp5it. :) I've heard they are great for receiving, especially on 160 where things are so noisy all the time. My coolest antenna I made recently was a tape measure yagi for 2 meters. Ha!

Let us know how you make out. :)

73,
Brett
 
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BJ radionut

Supporting Member and 6m addict
May 9, 2008
4,073
4,602
373
35 miles East of Indianapolis
Yep Commercial Grade vacuum variable...Jennings/Comet/Russian equivalent is about your only options at that power level...100w PEP+ requires pretty high voltage like 5K VDC or possible more depending on construction.
Then mounting and tuning are other hurdles.
GL
All the Best
Gary
 
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BJ radionut

Supporting Member and 6m addict
May 9, 2008
4,073
4,602
373
35 miles East of Indianapolis
Boy Vac Variable Capacitors are $$. Found this one from Palstar C600
http://www.palstar.com/en/capacitors/

Those are "Air" variables
These are Vacuum
http://www.mgs4u.com/RF-Microwave/vacuum-variable-capacitors-500.htm

https://www.rfparts.com/capacitors/capacitors-vacuumvari/vacummvariable-201to500pf.html

http://www.ur4ll.net/MLA.jpg http://www.ur4ll.net/#caps3
750var.jpg

15-750pF 5KV 35A max dia. 108mm, max len. 200mm (incl shaft)
(measured capacity is 10-780pF)
All the Best
Gary
 

BenMara

W9WDX Amateur Radio Club Member
Jan 16, 2013
113
15
28
SC swamplands
If i like the 160/80 mag loop performance, Ill most likely build one for 40/20. Can never have too many antennas on the farm.
 

MicroWave

Survivalist
Mar 9, 2018
57
25
18
Building a loop antenna yourself is always an option, but with most commercial antennas there is always something that doesn't fit exactly. Either they are too narrow, or they don't exactly cover the frequency ranges that you need, or there is no cable remote control, or there is a cable remote control, but the antenna is the ultimate junk, or they are not suitable for higher output power etc. It's really frustrating sometimes! (n)
 

jon666

Sr. Member
Jan 24, 2006
1,601
799
123
i have a mfj mag loop antenna. works great i got it on a rotor to turn to catch dx. of course it is not cheap around 500 bucks
 

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