[QRZ] The Development of the Directional AM Broadcast Antenna
 

Antennas, Feedlines, Towers & Rotors

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The Development of the Directional AM Broadcast Antenna

Posted: 04 Apr 2020 06:24 AM PDT
https://forums.qrz.com/index.php?thr...ntenna.699579/



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Wire Antennas Like Radio Works made (did)?? anybody else?

Posted: 04 Apr 2020 06:12 AM PDT
https://forums.qrz.com/index.php?thr...y-else.699615/



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Using what I have for 20m

Posted: 04 Apr 2020 05:11 AM PDT
https://forums.qrz.com/index.php?thr...or-20m.699582/



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RFI into neighbors speakers

Posted: 04 Apr 2020 04:05 AM PDT
https://forums.qrz.com/index.php?thr...eakers.699599/



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Rotator CDE... Identification ?

Posted: 04 Apr 2020 03:12 AM PDT
https://forums.qrz.com/index.php?thr...cation.699655/



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Looking for vertical HF antennas to submit to HOA

Posted: 03 Apr 2020 11:42 PM PDT
https://forums.qrz.com/index.php?thr...to-hoa.694711/



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Coax ninjas on VF

Posted: 03 Apr 2020 11:03 PM PDT
https://forums.qrz.com/index.php?thr...-on-vf.699621/



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Ideas for this QTH

Posted: 03 Apr 2020 08:53 PM PDT
https://forums.qrz.com/index.php?thr...is-qth.699628/



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Collinear antenna made of coax and end fed

Posted: 03 Apr 2020 08:26 PM PDT
https://forums.qrz.com/index.php?thr...nd-fed.698890/



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EFHW QSO Maps

Posted: 03 Apr 2020 07:43 PM PDT
https://forums.qrz.com/index.php?thr...o-maps.699479/



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Wind Load Equation.....390 constant?

Posted: 03 Apr 2020 06:12 PM PDT
https://forums.qrz.com/index.php?thr...nstant.699505/

[QRZ] The Development of the Directional AM Broadcast Antenna
 

On 4/4/2020 8:32 AM, QRZ.com via rec.radio.amateur.moderated Admin wrote:

Antennas, Feedlines, Towers & Rotors

///////////////////////////////////////////
The Development of the Directional AM Broadcast Antenna

Posted: 04 Apr 2020 06:24 AM PDT
https://forums.qrz.com/index.php?thr...ntenna.699579/




///////////////////////////////////////////
Wire Antennas Like Radio Works made (did)?? anybody else?

Posted: 04 Apr 2020 06:12 AM PDT
https://forums.qrz.com/index.php?thr...y-else.699615/




///////////////////////////////////////////
Using what I have for 20m

Posted: 04 Apr 2020 05:11 AM PDT
https://forums.qrz.com/index.php?thr...or-20m.699582/



///////////////////////////////////////////
RFI into neighbors speakers

Posted: 04 Apr 2020 04:05 AM PDT
https://forums.qrz.com/index.php?thr...eakers.699599/




///////////////////////////////////////////
Rotator CDE... Identification ?

Posted: 04 Apr 2020 03:12 AM PDT
https://forums.qrz.com/index.php?thr...cation.699655/



///////////////////////////////////////////
Looking for vertical HF antennas to submit to HOA

Posted: 03 Apr 2020 11:42 PM PDT
https://forums.qrz.com/index.php?thr...to-hoa.694711/




///////////////////////////////////////////
Coax ninjas on VF

Posted: 03 Apr 2020 11:03 PM PDT
https://forums.qrz.com/index.php?thr...-on-vf.699621/



///////////////////////////////////////////
Ideas for this QTH

Posted: 03 Apr 2020 08:53 PM PDT
https://forums.qrz.com/index.php?thr...is-qth.699628/



///////////////////////////////////////////
Collinear antenna made of coax and end fed

Posted: 03 Apr 2020 08:26 PM PDT
https://forums.qrz.com/index.php?thr...nd-fed.698890/




///////////////////////////////////////////
EFHW QSO Maps

Posted: 03 Apr 2020 07:43 PM PDT
https://forums.qrz.com/index.php?thr...o-maps.699479/



///////////////////////////////////////////
Wind Load Equation.....390 constant?

Posted: 03 Apr 2020 06:12 PM PDT
https://forums.qrz.com/index.php?thr...nstant.699505/




Directional antennas are not foolproof! I was briefly chief engineer for
a small town AM station in Ohio, when I needed a job between college and
grad school and happened to have a 1st class commercial license which
was needed. We had a couple of verticals fed through a phaser: Our
license required us not to send any RF northward. So it was embarrassing
when we got a QSL card from Ontario! One of my jobs was to measure the
current at the base of each tower once per day, and those were right on,
but we had no way to test the phase relationships.

In posting this I am hoping there is some statute of limitations for an
offense back in the early 1960's...