[Elecraft] [OT] Birds and DX
Dave Cole
dave at nk7z.net
Sun Jun 7 10:47:33 EDT 2020
Add upward pointing non-metallic pins along the top half of the loop.
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources
On 6/7/20 7:15 AM, Andy Durbin wrote:
> I use a home brew mag loop on 30 m band and work into Asia most mornings with it. The loop tunes to a near perfect match (1.00:1 SWR) but becomes instantly detuned when a dove perches on top of it. SWR jumps instantly to > 3.0:1 and trips my High SWR monitor. The birds look stupid but they are smart enough not to straddle the loop opening. I imagine full loop voltage between their legs would de-tune them a bit but they just perch one side or the other.
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> Damn dove nearly cost me a QSO with JD1 this morning and that was new DX for 30 m. I tail ended with FT8, he came back, I started to send my report, High SWR trip, run to back door to chase the dove away, and got back before JD1 had given up on me.
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> So how to keep birds of a mag loop without lowing the Q?
>
> 73,
> Andy k3wyc
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