Elecraft

[OT] Birds and DX

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ANDY DURBIN

[OT] Birds and DX

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.

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.

So how to keep birds of a mag loop without lowing the Q?

73,
Andy k3wyc

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Dave wo2x

Re: [OT] Birds and DX

Somehow figure out how to mount a fake owl on top?

Dave wo2x

Sent from my iPad

> On Jun 7, 2020, at 10:16 AM, Andy Durbin <[hidden email]> 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.
>
> 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.
>
> So how to keep birds of a mag loop without lowing the Q?
>
> 73,
> Andy k3wyc
>
>
>
>
>
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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ANDY DURBIN

Re: [OT] Birds and DX

"Somehow figure out how to mount a fake owl on top?"

There are several fake owls in or near the tails of aircraft at my local airport. There seems to be just as much bird excrement on these aircraft and on those with no owls.

73,
Andy, k3wyc

________________________________
From: Dave <[hidden email]>
Sent: Sunday, June 7, 2020 7:19 AM
To: Andy Durbin <[hidden email]>
Cc: [hidden email] <[hidden email]>
Subject: Re: [Elecraft] [OT] Birds and DX

Somehow figure out how to mount a fake owl on top?

Dave wo2x

Sent from my iPad

w4sc-2

Re: [OT] Birds and DX

In reply to this post by ANDY DURBIN

Get a CAT to guard the antenna

Sent from Mail for Windows 10

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Vic Rosenthal

Re: [OT] Birds and DX

In reply to this post by ANDY DURBIN

Owls don't work unless (maybe) you can mechanize it so that the wings
flap and it hoots.

I have a roof with pigeon issues, and the only thing that works is to
make the surface unattractive to them. If there is some way you could
attach spikes to the top surfaces... maybe superglue broken glass to it?
Or wrap it with fiberglass insulation, or use that plastic stuff used to
protect kids from the supports of a swing set to make it too fat for
them to want to sit on.

The only thing that works (other than birdshot) is to make the surface
unattractive.

73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
On 07/06/2020 17:15, 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.
>
> 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.
>
> So how to keep birds of a mag loop without lowing the Q?
>
> 73,
> Andy k3wyc
>
>
>
>
>
>
>
>
> ______________________________________________________________
> Elecraft mailing list
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>

AI4NS

Re: [OT] Birds and DX

In reply to this post by ANDY DURBIN

Make a cage using non-conducting mesh and pvc pipe to put over the antenna.

On Sun, Jun 7, 2020 at 09:16 Andy Durbin <[hidden email]> 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.
>
> 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.
>
> So how to keep birds of a mag loop without lowing the Q?
>
> 73,
> Andy k3wyc
>
>
>
>
>
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

NK7Z

Re: [OT] Birds and DX

In reply to this post by ANDY DURBIN

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:

Dave wo2x

Re: [OT] Birds and DX

In reply to this post by Vic Rosenthal

Victor’s idea is very good. Some kind of material to create spikes, or a surface where they cannot perch.

II think the cat would want to wander the neighborhood ;-)

Dave wo2x

Dave wo2x

Sent from my iPad

> On Jun 7, 2020, at 10:35 AM, Victor Rosenthal 4X6GP <[hidden email]> wrote:
>
> Owls don't work unless (maybe) you can mechanize it so that the wings flap and it hoots.
>
> I have a roof with pigeon issues, and the only thing that works is to make the surface unattractive to them. If there is some way you could attach spikes to the top surfaces... maybe superglue broken glass to it? Or wrap it with fiberglass insulation, or use that plastic stuff used to protect kids from the supports of a swing set to make it too fat for them to want to sit on.
>
> The only thing that works (other than birdshot) is to make the surface unattractive.
>
> 73,
> Victor, 4X6GP
> Rehovot, Israel
> Formerly K2VCO
> CWops no. 5
> http://www.qsl.net/k2vco/
>> On 07/06/2020 17:15, 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.
>> 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.
>> So how to keep birds of a mag loop without lowing the Q?
>> 73,
>> Andy k3wyc
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
> ______________________________________________________________
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> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>
> This list hosted by: http://www.qsl.net
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Elecraft mailing list

Re: [OT] Birds and DX

In reply to this post by NK7Z

Reflective sparkly tapes seem to keep birds off my boats.
Cheap to buy on Amazon. Search for “bird repellent”.
de K7IM

Sent from my iPad

> On Jun 7, 2020, at 07:48, Dave Cole <[hidden email]> wrote:
>
> 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.
>> 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.
>> So how to keep birds of a mag loop without lowing the Q?
>> 73,
>> Andy k3wyc
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
> ______________________________________________________________
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>
> This list hosted by: http://www.qsl.net
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jack frake

Re: [OT] Birds and DX

Try wire raps cut to leave about 1 inch protruding, maybe 2 or 3 inches
apart.

Wouldn't RF burn keep them away?

On Sun, Jun 7, 2020, 10:54 AM Michael K Bottles via Elecraft <
[hidden email]> wrote:

> Reflective sparkly tapes seem to keep birds off my boats.
> Cheap to buy on Amazon. Search for “bird repellent”.
> de K7IM
>
> Sent from my iPad
>
> > On Jun 7, 2020, at 07:48, Dave Cole <[hidden email]> wrote:
> >
> > 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.
> >> 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.
> >> So how to keep birds of a mag loop without lowing the Q?
> >> 73,
> >> Andy k3wyc
> >> ______________________________________________________________
> >> Elecraft mailing list
> >> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> >> Help: http://mailman.qth.net/mmfaq.htm
> >> Post: mailto:[hidden email]
> >> This list hosted by: http://www.qsl.net
> >> Please help support this email list: http://www.qsl.net/donate.html
> >> Message delivered to [hidden email]
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> > Message delivered to [hidden email]
> ______________________________________________________________
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Augie "Gus" Hansen

Re: [OT] Birds and DX

In reply to this post by ANDY DURBIN

On 6/7/2020 8:15 AM, Andy Durbin wrote:
> So how to keep birds of a mag loop without lowing the Q?

I had a similar problem with one of my early mag loop attempts about 20
years ago. If your loop is a single turn type you could arrange for the
tuning cap to be at the bottom with the coupling loop at the top. That
puts the voltage-neutral point where the birds will perch, and they will
have no effect on the tuning.

The birds don't bother my two-turn mag loop (pix on my QRZ page) at all
these days because they prefer to perch on the LPDA on the main tower.

Gus Hansen
KB0YH

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k2te

Re: [OT] Birds and DX

In reply to this post by ANDY DURBIN

Contact the Audobon Society to see if you can have a nest for a bird of
prey (falcon perhaps). Hopefully, it is one that will like crows as
well...

73 de Ed

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Mike Maloney

Re: [OT] Birds and DX

Stick some toothpicks in strip of styrofoam.
Mike AC5P
On Sunday, June 7, 2020, 11:14:11 AM CDT, [hidden email] <[hidden email]> wrote:

Contact the Audobon Society to see if you can have a nest for a bird of
prey (falcon perhaps). Hopefully, it is one that will like crows as
well...

73 de Ed

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Sponsored by https://www.newser.com/?utm_source=part&utm_medium=uol&utm_campaign=rss_taglines_more

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New Cop Killings Spark Outrage, Manslaughter Charge
http://thirdpartyoffers.juno.com/TGL3141/5edd11db8880311db60bast01vuc3
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Phil Kane-2

Re: [OT] Birds and DX

In reply to this post by Dave wo2x

On 6/7/2020 7:19 AM, Dave wrote:

>> So how to keep birds of a mag loop without lowing the Q?

> Somehow figure out how to mount a fake owl on top?

I had a "fake owl" (from the HRO catalog) mounted on the peak of the
A-frame roof over the doorway of my former "House of 13 Antennas". The
crows loved to dive-bomb and perch on it while ignoring all the other
places provided by the antennas and left us plenty of "souvenirs" as a
token of their affection..

73 de K2ASP - Phil Kane
Elecraft K2/100 s/n 5402

From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon
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Phil Kane-2

Re: [OT] Birds and DX

In reply to this post by AI4NS

On 6/7/2020 7:44 AM, Mike Short wrote:

> Make a cage using non-conducting mesh and pvc pipe to put over the antenna.

My loop is set on a covered porch. Birds don't rest on it - neither do
radio signals (big disappointment documented elsewhere in this reflector).

73 de K2ASP - Phil Kane
Elecraft K2/100 s/n 5402

From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon
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Phil Kane-2

Re: [OT] Birds and DX

In reply to this post by k2te

On 6/7/2020 9:11 AM, [hidden email] wrote:

> Contact the Audobon Society to see if you can have a nest for a bird of
> prey (falcon perhaps). Hopefully, it is one that will like crows as
> well...

If you think hams are fanatics about ham radio things like DX or
contesting, birders exhibit the same reaction about messing with their
birds. The wife of one of my ham colleagues is very much a birder and
that leads to do some interesting interaction. He put all of his
antennas on his van - and no birds perch on it.

73 de K2ASP - Phil Kane
Elecraft K2/100 s/n 5402

From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon
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Paul Evans W4/VP9KF

Re: [OT] Birds and DX

In reply to this post by ANDY DURBIN

This _always_ works, as proven in a marina on my boat (and those that
adopted it!):

Take old CD. Drill a small hole near the edge. Dangle from object or
anything nearby with thin string.

Works when every other possible bird scarer had failed. No birds. No poop.

73, Paul.
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Elecraft mailing list

Re: [OT] Birds and DX

Yup, that is a flashy sparkly thing like the ribbon I suggested. Birds don’t seem to like that.

Sent from my iPad

> On Jun 7, 2020, at 11:54, Paul Evans W4/VP9KF <[hidden email]> wrote:
>
> This _always_ works, as proven in a marina on my boat (and those that
> adopted it!):
>
> Take old CD. Drill a small hole near the edge. Dangle from object or
> anything nearby with thin string.
>
> Works when every other possible bird scarer had failed. No birds. No poop.
>
> 73, Paul.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

RICHARD Martin

Re: [OT] Birds and DX

You can purchase light weight telescoping fiberglass poles (about 25') with
a kite that looks like a bird of prey. The kite bobs, swirls and dives.
Quite an entertaining display.

They work quite well keeping the birds and squirrels away from our fruit
trees. They are also popular along Sunset Drive in Pacific Grove to deal
with the seagulls.

73s
Dick KN6AA

On Sun, Jun 7, 2020, 12:09 Michael K Bottles via Elecraft <
[hidden email]> wrote:

> Yup, that is a flashy sparkly thing like the ribbon I suggested. Birds
> don’t seem to like that.
>
> Sent from my iPad
>
> > On Jun 7, 2020, at 11:54, Paul Evans W4/VP9KF <[hidden email]> wrote:
> >
> > This _always_ works, as proven in a marina on my boat (and those that
> > adopted it!):
> >
> > Take old CD. Drill a small hole near the edge. Dangle from object or
> > anything nearby with thin string.
> >
> > Works when every other possible bird scarer had failed. No birds. No
> poop.
> >
> > 73, Paul.
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> > Message delivered to [hidden email]
> ______________________________________________________________
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Lyn WØLEN

Re: [OT] Birds and DX

I saw this on Shark Tank. They are EXTREMELY sharp!

73
Lyn, W0LEN

https://allsharktankproducts.com/shark-tank-products-home/critter-pricker-raccoon-deterrent/#:~:text=Critter%20Prickers%20are%20strips%20of,of%20roughly%20three%20square%20feet.

-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On Behalf Of RICHARD Martin
Sent: Sunday, June 07, 2020 5:02 PM
To: Michael K Bottles
Cc: [hidden email]
Subject: Re: [Elecraft] [OT] Birds and DX

You can purchase light weight telescoping fiberglass poles (about 25') with
a kite that looks like a bird of prey. The kite bobs, swirls and dives.
Quite an entertaining display.

They work quite well keeping the birds and squirrels away from our fruit
trees. They are also popular along Sunset Drive in Pacific Grove to deal
with the seagulls.

73s
Dick KN6AA

On Sun, Jun 7, 2020, 12:09 Michael K Bottles via Elecraft <
[hidden email]> wrote:

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