20M Loop
3 posters
Re: 20M Loop
by admin Sat Feb 02, 2019 5:33 pm
zsolt wrote:HI,
is the talking done here about 20 meter loop antenna ? really 20m in diameter in vertical position ?
20-metre (wavelength) amateur radio band = 14.000 MHz to 14.350 MHz.
BR Harry
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Re: 20M Loop
by Scheig Thu Jan 31, 2019 9:11 pm
No, this is a small antenna not even one meter in diameter.
Scheig- Posts : 3
Join date : 2019-01-29
Re: 20M Loop
by zsolt Thu Jan 31, 2019 8:33 pm
HI,
is the talking donne here about 20 meter loop antenna ? really 20m in diameter in vertical position ?
is the talking donne here about 20 meter loop antenna ? really 20m in diameter in vertical position ?
zsolt- Posts : 209
Join date : 2017-12-19
Re: 20M Loop
by admin Wed Jan 30, 2019 8:37 pm
No problem.
I have often answered questions without first reading them properly. So easily done
if you want to build it for other bands then you can indeed scale it. If you "under-cook it" and find the natural resonance is, say, 14.9MHz, then you can thread a plastic tube between the turns to stagger them and get more space between them, horisontally.
If you have any questions then do not hesitate to ask. You are always welcome
Best regards from harry - SM0VPO (and EA/SM0VPO)
I have often answered questions without first reading them properly. So easily done
if you want to build it for other bands then you can indeed scale it. If you "under-cook it" and find the natural resonance is, say, 14.9MHz, then you can thread a plastic tube between the turns to stagger them and get more space between them, horisontally.
If you have any questions then do not hesitate to ask. You are always welcome
Best regards from harry - SM0VPO (and EA/SM0VPO)
_________________
Everything in this world is either bacon, or it isn't bacon
They say that money cannot bring you happiness, but if you have it then you can always buy more bacon
admin- Admin
- Posts : 1144
Join date : 2012-11-24
Age : 73
Location : Märsta, Sweden -
Re: 20M Loop
by Scheig Tue Jan 29, 2019 3:56 pm
Sorry, just answered my own question. Forgot about the geometry. The wires are actually about 2.8 CM apart.
Scheig- Posts : 3
Join date : 2019-01-29
20M Loop
by Scheig Tue Jan 29, 2019 3:42 pm
I was very much interested in your design of your 20 m loop antenna. I want to build one myself although it needs to be a bit smaller and I'm going to build it for 15 m. The question I have, is if you found a self resonance with the wires spaced at 2.5 cm why did you then build it with the wires spaced at 4cm?
Scheig- Posts : 3
Join date : 2019-01-29
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