corpus.blog
41554 blogs · [ { "id": "01a087bb-b3f4-710b-ad85-74e8dd388f56", "title": "FT8 without a PC: using FT8AF and an Android smartphone", "url": "https://www.pa9x.com/ft8-without-a-pc-using-ft8af-and-an-android-smartphone/", "published_at": "2026-08-21T08:07:09+00:00" }, { "id": "01a087bb-b3f4-710b-ad85-74e8dd8424f2", "title": "HF Reception: Urban vs. Rural", "url": "https://www.pa9x.com/hf-reception-urban-vs-rural/", "published_at": "2026-06-01T07:51:30+00:00" }, { "id": "01a087bb-b3f4-710b-ad85-74e8de54c254", "title": "Endfed Antennas, QRM, and How to Improve Your Reception", "url": "https://www.pa9x.com/endfed-antennas-qrm-and-how-to-improve-your-reception/", "published_at": "2025-08-27T08:53:48+00:00" }, { "id": "01a087bb-b3f4-710b-ad85-74e8de89b370", "title": "Boost Your End Fed Antenna with Proper Counterpoise", "url": "https://www.pa9x.com/boost-your-end-fed-antenna-with-proper-counterpoise/", "published_at": "2025-05-03T12:44:12+00:00" }, { "id": "01a087bb-b3f4-710b-ad85-74e8deb2876c", "title": "How to replace the noisy fan on the WEB-888", "url": "https://www.pa9x.com/how-to-replace-the-noisy-fan-on-the-web-888/", "published_at": "2025-02-17T19:26:27+00:00" }, { "id": "01a087bb-b3f4-710b-ad85-74e8df91e239", "title": "How to get started with a remote antenne tuner", "url": "https://www.pa9x.com/how-to-get-started-with-a-remote-antenne-tuner/", "published_at": "2024-12-29T14:10:18+00:00" }, { "id": "01a087bb-b3f4-710b-ad85-74e8df97a103", "title": "How to read an ionogram", "url": "https://www.pa9x.com/how-to-read-an-ionogram/", "published_at": "2024-11-09T14:42:09+00:00" }, { "id": "01a087bb-b3f5-71b8-9477-a8fee34db0e1", "title": "Which coaxial cable should I choose?", "url": "https://www.pa9x.com/which-coaxial-cable-should-i-choose/", "published_at": "2024-11-03T12:32:07+00:00" }, { "id": "01a087bb-b3f5-71b8-9477-a8fee3c28a31", "title": "Review of the RM Italy BLA 350 Plus Amplifier", "url": "https://www.pa9x.com/review-of-the-rm-italy-bla-350-plus-amplifier/", "published_at": "2024-10-24T19:24:15+00:00" }, { "id": "01a087bb-b3f5-71b8-9477-a8fee4656f0e", "title": "Reception comparison: vertical vs. horizontal loop", "url": "https://www.pa9x.com/reception-comparison-vertical-vs-horizontal-loop/", "published_at": "2024-05-25T12:45:27+00:00" }, { "id": "01a0bdcb-2221-72ef-9f07-45909b5fe588", "title": "Tips for ham radio antennas in an attic", "url": "https://www.pa9x.com/tips-ham-radio-antennas-attic/", "published_at": "2024-03-18T20:01:29+00:00" }, { "id": "01a0bdcb-2221-72ef-9f07-45909b9826e2", "title": "Replacing the 1:1 balun for a better performing Cobweb antenna", "url": "https://www.pa9x.com/replacing-the-11-balun-for-a-better-performing-cobweb-antenna/", "published_at": "2024-03-09T14:47:41+00:00" }, { "id": "01a0bdcb-2221-72ef-9f07-45909bce9b93", "title": "Chosing ham radio equipment as a newbie", "url": "https://www.pa9x.com/chosing-ham-radio-equipment-as-a-newbie/", "published_at": "2023-12-30T12:46:12+00:00" }, { "id": "01a0bdcb-2221-72ef-9f07-45909c31863b", "title": "Understanding PEP power and duty cycle in amateur radio", "url": "https://www.pa9x.com/pep-power-and-duty-cycle-in-amateur-radio/", "published_at": "2023-12-01T14:40:47+00:00" }, { "id": "01a0bdcb-2221-72ef-9f07-45909cd662f2", "title": "Using AI to eliminate noise in a radio signal", "url": "https://www.pa9x.com/using-ai-to-strip-a-radio-signal-from-qrm/", "published_at": "2023-10-29T14:31:49+00:00" }, { "id": "01a0bdcb-2221-72ef-9f07-45909d56ff7e", "title": "Why does an antenna require a counterpoise?", "url": "https://www.pa9x.com/why-does-an-antenna-require-a-counterpoise/", "published_at": "2023-10-08T11:27:34+00:00" }, { "id": "01a0bdcb-2221-72ef-9f07-45909d821cbc", "title": "Review of the 7-band AWK Cobweb antenna", "url": "https://www.pa9x.com/review-of-the-7-band-awk-cobweb-antenna/", "published_at": "2023-09-22T11:11:29+00:00" }, { "id": "01a0bdcb-2221-72ef-9f07-45909e70555f", "title": "Why does an antenna need a 1:1 balun?", "url": "https://www.pa9x.com/why-does-an-antenna-need-a-1-to-1-balun/", "published_at": "2023-06-02T15:04:35+00:00" }, { "id": "01a0bdcb-2221-72ef-9f07-45909e9a0f1d", "title": "How to prevent RFI caused by EndFed, vertical and dipole antennas ", "url": "https://www.pa9x.com/how-to-prevent-rfi-caused-by-endfed-vertical-and-dipole-antennas/", "published_at": "2023-04-30T20:23:15+00:00" }, { "id": "01a0bdcb-2221-72ef-9f07-45909f5d6175", "title": "The Cobweb vs Rybakov vertical antenna part 1", "url": "https://www.pa9x.com/the-cobweb-vs-rybakov-vertical-part-1/", "published_at": "2023-04-22T14:14:24+00:00" }, { "id": "01a0bdd1-b77a-7239-be70-62fa17231ff7", "title": "Getting rid of QRM with diversity receive mode", "url": "https://www.pa9x.com/get-rid-of-qrm-with-diversity-mode/", "published_at": "2023-04-18T19:48:56+00:00" }, { "id": "01a0bdd1-b77a-7239-be70-62fa1784885a", "title": "The difference between a balun, unun, common mode choke, line isolator and impedance transformer", "url": "https://www.pa9x.com/the-difference-between-a-balun-unun-common-mode-choke-line-isolator-and-impedance-transformer/", "published_at": "2023-03-29T19:23:05+00:00" }, { "id": "01a0bdd1-b77a-7239-be70-62fa17c346f8", "title": "The surprisingly well performing Rybakov HF vertical", "url": "https://www.pa9x.com/the-surprisingly-well-performing-rybakov-hf-vertical/", "published_at": "2023-03-12T14:32:32+00:00" }, { "id": "01a0bdd1-b77a-7239-be70-62fa17d84b5c", "title": "Cobweb antenna pros and cons", "url": "https://www.pa9x.com/cobweb-antenna-pros-and-cons/", "published_at": "2023-02-05T12:20:01+00:00" }, { "id": "01a0bdd1-b77a-7239-be70-62fa187fb44f", "title": "Multiband Cobweb(b) vs Classic Halo; final verdict", "url": "https://www.pa9x.com/multiband-cobwebb-vs-classic-halo-final-verdict/", "published_at": "2023-02-01T20:07:49+00:00" }, { "id": "01a0bdd1-b77a-7239-be70-62fa19489b3f", "title": "Tips on how to operate and finetune a QRM Eliminator", "url": "https://www.pa9x.com/tips-on-how-to-operate-and-finetune-a-qrm-eliminator/", "published_at": "2021-09-05T10:55:23+00:00" }, { "id": "01a0bdd1-b77a-7239-be70-62fa198cae38", "title": "The Hula Hoop Halo; a simple DIY antenna for 6 meter band DX", "url": "https://www.pa9x.com/the-hula-hoop-halo-a-simple-diy-antenna-for-6-meter-band-dx/", "published_at": "2021-05-29T13:09:54+00:00" }, { "id": "01a0bdd1-b77a-7239-be70-62fa1a552eae", "title": "A different approach to tuning the Cobwebb antenna", "url": "https://www.pa9x.com/tuning-the-cobwebb-antenna-with-a-different-approach/", "published_at": "2021-05-10T17:52:55+00:00" }, { "id": "01a0bdd1-b77a-7239-be70-62fa1b245d40", "title": "How to build a limited space 10 and 20 meter band Square Halo DX antenna", "url": "https://www.pa9x.com/how-to-build-10-and-20-meter-band-square-halo-antenna/", "published_at": "2021-02-24T19:35:55+00:00" }, { "id": "01a0bdd1-b77a-7239-be70-62fa1b8fb5a9", "title": "How to setup a webSDR as your secundary receiver", "url": "https://www.pa9x.com/how-to-setup-a-websdr-as-your-secundary-receiver/", "published_at": "2020-06-28T10:37:15+00:00" }, { "id": "01a0bdd5-6dd7-7174-a2bf-72515a9f579c", "title": "How the replacement of solar panel micro inverters lead to 50 dB less QRM", "url": "https://www.pa9x.com/how-the-replacement-of-solar-panel-micro-inverters-lead-to-50-db-less-qrm/", "published_at": "2020-06-21T18:17:00+00:00" }, { "id": "01a0bdd5-6dd7-7174-a2bf-72515b90412f", "title": "Is your antenna making noise? Use a rope!", "url": "https://www.pa9x.com/is-your-antenna-making-noise-use-a-rope/", "published_at": "2020-04-08T07:49:44+00:00" }, { "id": "01a0bdd5-6dd7-7174-a2bf-72515c39b8ca", "title": "Boost your QRM eliminator performance with an active antenna", "url": "https://www.pa9x.com/boost-your-qrm-eliminator-performance-with-an-active-antenna/", "published_at": "2020-02-09T15:23:29+00:00" }, { "id": "01a0bdd5-6dd7-7174-a2bf-72515c6bc83e", "title": "Review of the QRM Eliminator X-phase", "url": "https://www.pa9x.com/review-of-the-qrm-eliminator-x-phase/", "published_at": "2019-04-06T14:27:28+00:00" }, { "id": "01a0bdd5-6dd7-7174-a2bf-72515cf30db3", "title": "When the noise came banging in", "url": "https://www.pa9x.com/when-the-noise-came-banging-in/", "published_at": "2019-04-02T17:59:48+00:00" }, { "id": "01a0bdd5-6dd7-7174-a2bf-72515dde2a64", "title": "How to setup a panadapter for the Kenwood TS-480", "url": "https://www.pa9x.com/how-to-setup-a-panadapter-for-the-kenwood-ts-480/", "published_at": "2018-06-24T11:53:06+00:00" }, { "id": "01a0bdd5-6dd7-7174-a2bf-72515e061a1a", "title": "Upgrading the vertical for the lower HF bands", "url": "https://www.pa9x.com/upgrading-the-vertical-for-the-lower-hf-bands/", "published_at": "2018-01-07T18:55:35+00:00" }, { "id": "01a0bdd5-6dd7-7174-a2bf-72515e4e13a5", "title": "CG-3000 remote auto tuner on HF vertical review", "url": "https://www.pa9x.com/cg-3000-remote-auto-tuner-on-hf-vertical-review/", "published_at": "2015-02-20T13:25:32+00:00" }, { "id": "01a0bdd5-6dd7-7174-a2bf-72515ee47065", "title": "New PA9X QSL card", "url": "https://www.pa9x.com/new-pa9x-qsl-card/", "published_at": "2014-11-02T13:04:54+00:00" }, { "id": "01a0bdd5-6dd7-7174-a2bf-72515ef6c1dd", "title": "How to run an NCDXF IARU Beacon Monitoring station", "url": "https://www.pa9x.com/how-run-ncdxf-iaru-beacon-monitoring-station/", "published_at": "2014-07-01T21:29:36+00:00" }, { "id": "01a0bdd8-aea0-7381-820c-ffd3f7386906", "title": "Why WiFi repeaters do not guarantee fast internet", "url": "https://www.pa9x.com/wifi-repeaters-guarantee-fast-internet/", "published_at": "2014-06-21T16:23:26+00:00" }, { "id": "01a0bdd8-aea0-7381-820c-ffd3f80e4a4a", "title": "Solutions to improve your Wifi range", "url": "https://www.pa9x.com/solutions-to-improve-your-wifi-range/", "published_at": "2014-05-03T14:57:56+00:00" }, { "id": "01a0bdd8-aea0-7381-820c-ffd3f8439d90", "title": "LED lights, a sustainable radio disaster", "url": "https://www.pa9x.com/led-lights-sustainable-radio-disaster/", "published_at": "2013-09-30T14:29:54+00:00" }, { "id": "01a0bdd8-aea0-7381-820c-ffd3f8d1e3b5", "title": "The liquid HF vertical for 10m to 40m", "url": "https://www.pa9x.com/the-liquid-hf-vertical-for-10m-to-40m/", "published_at": "2013-09-06T19:04:37+00:00" }, { "id": "01a0bdd8-aea0-7381-820c-ffd3f8f5792e", "title": "Better DX hunting with a 14 US Dollar SDR receiver", "url": "https://www.pa9x.com/better-dx-hunting-with-a-14-dollar-sdr-receiver/", "published_at": "2013-05-10T14:57:48+00:00" }, { "id": "01a0bdd8-aea0-7381-820c-ffd3f9550f4d", "title": "Long path propagation or short path propagation on HF?", "url": "https://www.pa9x.com/long-path-or-short-path-propagation/", "published_at": "2012-12-15T11:36:58+00:00" }, { "id": "01a0bdd8-aea0-7381-820c-ffd3f9beac72", "title": "Has Solar Cycle 24 finished?", "url": "https://www.pa9x.com/has-solar-cycle-24-finished/", "published_at": "2012-04-11T19:56:10+00:00" }, { "id": "01a0bdd8-aea0-7381-820c-ffd3fa548615", "title": "Nice propagation to test the Moxon antenna", "url": "https://www.pa9x.com/nice-propagation-to-test-the-moxon-antenna/", "published_at": "2011-11-10T17:27:45+00:00" }, { "id": "01a0bdd8-aea0-7381-820c-ffd3fb309996", "title": "Let’s start testing the 10m Moxon antenna, or not…", "url": "https://www.pa9x.com/lets-start-testing-the-10m-moxon-antenna-or-not/", "published_at": "2011-10-19T18:34:03+00:00" }, { "id": "01a0bdd8-aea0-7381-820c-ffd3fb582fac", "title": "Finally some good old propagation", "url": "https://www.pa9x.com/finally-some-good-old-propagation/", "published_at": "2011-10-12T20:14:09+00:00" }, { "id": "01a0bddc-c445-72ff-a269-658e066896a8", "title": "Moxon up and running, first impressions", "url": "https://www.pa9x.com/moxon-up-and-running/", "published_at": "2011-09-10T18:04:56+00:00" }, { "id": "01a0bddc-c445-72ff-a269-658e06d13fd1", "title": "Working on the homemade 10m Moxon", "url": "https://www.pa9x.com/working-on-the-10m-moxon/", "published_at": "2011-08-09T14:02:07+00:00" } ] posts Claim your blog
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pa9x.com

pa9x.com

2026

FT8 without a PC: using FT8AF and an Android smartphoneoriginal ↗
21 Aug 2026
HF Reception: Urban vs. Ruraloriginal ↗
1 Jun 2026

2025

Endfed Antennas, QRM, and How to Improve Your Receptionoriginal ↗
27 Aug 2025
Boost Your End Fed Antenna with Proper Counterpoiseoriginal ↗
3 May 2025
How to replace the noisy fan on the WEB-888original ↗
17 Feb 2025

2024

How to get started with a remote antenne tuneroriginal ↗
29 Dec 2024
How to read an ionogramoriginal ↗
9 Nov 2024
Which coaxial cable should I choose?original ↗
3 Nov 2024
Review of the RM Italy BLA 350 Plus Amplifieroriginal ↗
24 Oct 2024
Reception comparison: vertical vs. horizontal looporiginal ↗
25 May 2024
Tips for ham radio antennas in an atticoriginal ↗
18 Mar 2024
Replacing the 1:1 balun for a better performing Cobweb antennaoriginal ↗
9 Mar 2024

2023

Chosing ham radio equipment as a newbieoriginal ↗
30 Dec 2023
Understanding PEP power and duty cycle in amateur radiooriginal ↗
1 Dec 2023
Using AI to eliminate noise in a radio signaloriginal ↗
29 Oct 2023
Why does an antenna require a counterpoise?original ↗
8 Oct 2023
Review of the 7-band AWK Cobweb antennaoriginal ↗
22 Sept 2023
Why does an antenna need a 1:1 balun?original ↗
2 Jun 2023
How to prevent RFI caused by EndFed, vertical and dipole antennas original ↗
30 Apr 2023
The Cobweb vs Rybakov vertical antenna part 1original ↗
22 Apr 2023
Getting rid of QRM with diversity receive modeoriginal ↗
18 Apr 2023
The difference between a balun, unun, common mode choke, line isolator and impedance transformeroriginal ↗
29 Mar 2023
The surprisingly well performing Rybakov HF verticaloriginal ↗
12 Mar 2023
Cobweb antenna pros and consoriginal ↗
5 Feb 2023
Multiband Cobweb(b) vs Classic Halo; final verdictoriginal ↗
1 Feb 2023

2021

Tips on how to operate and finetune a QRM Eliminatororiginal ↗
5 Sept 2021
The Hula Hoop Halo; a simple DIY antenna for 6 meter band DXoriginal ↗
29 May 2021
A different approach to tuning the Cobwebb antennaoriginal ↗
10 May 2021
How to build a limited space 10 and 20 meter band Square Halo DX antennaoriginal ↗
24 Feb 2021

2020

How to setup a webSDR as your secundary receiveroriginal ↗
28 Jun 2020
How the replacement of solar panel micro inverters lead to 50 dB less QRMoriginal ↗
21 Jun 2020
Is your antenna making noise? Use a rope!original ↗
8 Apr 2020
Boost your QRM eliminator performance with an active antennaoriginal ↗
9 Feb 2020

2019

Review of the QRM Eliminator X-phaseoriginal ↗
6 Apr 2019
When the noise came banging inoriginal ↗
2 Apr 2019

2018

How to setup a panadapter for the Kenwood TS-480original ↗
24 Jun 2018
Upgrading the vertical for the lower HF bandsoriginal ↗
7 Jan 2018

2015

CG-3000 remote auto tuner on HF vertical revieworiginal ↗
20 Feb 2015

2014

New PA9X QSL cardoriginal ↗
2 Nov 2014
How to run an NCDXF IARU Beacon Monitoring stationoriginal ↗
1 Jul 2014
Why WiFi repeaters do not guarantee fast internetoriginal ↗
21 Jun 2014
Solutions to improve your Wifi rangeoriginal ↗
3 May 2014

2013

LED lights, a sustainable radio disasteroriginal ↗
30 Sept 2013
The liquid HF vertical for 10m to 40moriginal ↗
6 Sept 2013
Better DX hunting with a 14 US Dollar SDR receiveroriginal ↗
10 May 2013

2012

Long path propagation or short path propagation on HF?original ↗
15 Dec 2012
Has Solar Cycle 24 finished?original ↗
11 Apr 2012

2011

Nice propagation to test the Moxon antennaoriginal ↗
10 Nov 2011
Let’s start testing the 10m Moxon antenna, or not…original ↗
19 Oct 2011
Finally some good old propagationoriginal ↗
12 Oct 2011
Moxon up and running, first impressionsoriginal ↗
10 Sept 2011
Working on the homemade 10m Moxonoriginal ↗
9 Aug 2011