@PA9X profile picture
🅿️🅰️9️⃣❌ @PA9X

J-P. Amateur radio experiments, hamradio, propagation, antennas, noise victim, hobby scientist, NL13951, VERON. JO21hs.

Joined September 2010
  • Tweets 6,717
  • Following 1,758
  • Followers 2,568
1,354 Photos and videos
🅿️🅰️9️⃣❌ retweeted
Alexey DXman@RA4SD
Jun 9
Just found my RX antenna featured in an AI-generated brochure. The AI gave it four guy ropes and made the loops perfectly round. Looks like it's already started redesigning my hardware. 😄 I suppose that's a sign of popularity!
2
2
36
1,155
These SNR figures are putting the setup here in the top 20 KiwiSDR and WEB-888 receivers worldwide. And the setup is not optimal yet. That is way beyond my expectations. #hamradio
1
8
364
I recently moved from an urban to a rural QTH. The expectations concerning manmade noise are high. This is how it turned out. #hamradio pa9x.com/hf-reception-urban-…

HF reception comparison: Urban Noise vs. Rural Silence - PA9X

Discover how much quieter HF reception can be in a rural location compared with an urban QTH, based on real webSDR observations.

pa9x.com
3
4
15
563
Jullie maken het wel heel bont @ZiggoWebcare. € 2,50 per maand extra betalen voor ESPN waar ik niet om gevraagd heb. Alsof je bij de bakker twee broden koopt en dan verplicht koeken moet afrekenen, die je nooit gaat eten.
7
18
4,945
The Wellgood v4 loop peaking over the hedge.
4
35
731
First time receiving an FT8 spot from South America with the WEB-888 webSDR and Wellgood loop. So much less nighttime noise at the new QTH. #hamradio
1
2
8
303
With the recent move to the new QTH, the noise floor on my webSDR dropped significantly. I am actually hearing things I haven't heard for a very very long time. First screenshot = old QTH (urban) Second screenshot = new QTH (rural) #hamradio
4
2
72
2,781
Anyone used an automatic tuner like LDG, MFJ or MAT as a remote tuner at the antenna itself?
17
2
26
1,932
I own a CG-3000 but looking for an ATU that can handle 500W PEP.
3
4
291
At some time antennas on the roof were widely accepted. Nowadays our ham antennas are the neighbour's reason for slow wifi, bad 5G and HOA nightmares. I once had a neighbour thinking I was spying for the government... #hamradio
21
11
104
3,430
New QTH next month. Idea for the new antenne setup: Double Zepp 2x ±14m legs in inverted V with center 14m up a mast. Feed it through a CG-3000 remote auto tuner, 1:1 balun and 14m 450 Ohm ladder line. Should cover 80 meters up to 10 meters and possibly 6 meters. #hamradio
5
1
43
1,579
🅿️🅰️9️⃣❌ retweeted
𝗣𝗘𝟭𝗥𝗗𝗣@PE1RDP
Mar 25
Your phone can be a useful tool to check fuses. #hamradio #hamr #AmateurRadio #electronic #DIY #repair #troubleshooting #fuse #phone #tool
0:10
1
1
23
1,081
🅿️🅰️9️⃣❌ retweeted
Julian OH8STN
@OH8STN
Mar 20
The most important Icom IC-7300 MK2 off-grid feature is its low receive current, sometimes as low as 0.68A. Efficiency matters on battery & solar, especially for stations like my Winlink RMS Gateway that spends most of its time listening. #oh8stn #hamradio #icomic7300mk2
0:51
6
23
227
14,617
30 years ago. Those were good times.
1
1
38
636
Ferrite toroids are not elastic. They won't bounce back when dropped on a concrete floor. They will actually become double letter C. The C's in concrete...
5
1
38
1,570
De afdeling Nieuwe Waterweg van @VERON_Nederland organiseert dinsdagavond 3 maart haar jaarlijkse verkoping. Deze keer is er een mooi aanbod aan apparatuur, onderdelen en gereedschappen o.a. uit nalatenschappen. Meer informatie: a59.veron.nl/verkoping-dinsd…

Verkoping dinsdag 3 maart 2026 - VERON A59 - Nieuwe Waterweg

De jaarlijkse voorjaarsverkoping staat weer op de agenda. Ook dit jaar kunnen we weer spreken van een mooi aanbod. Antennes, transceivers, voedingen, kabels, baluns, pluggen, componenten en gereeds...

a59.veron.nl
1
1
264
🅿️🅰️9️⃣❌ retweeted
VERON@VERON_Nederland
Feb 17
Het volgende RF-webinar wordt verzorgd door Hans DC1EHG/PA0EHG op zondag 22 februari 2026 om 15:00 uur met een bijzonder interessante presentatie over ‘Radar in de luchtvaart’. Alle details lees je op veron.nl/nieuws/rf-seminar-l… #RadioIsMagie #BeleefHetMetDeVERON #Radar
1
5
236
Preparations ongoing at PI4VNW for PACC contest. Give us a call! #hamradio
1
10
386
🅿️🅰️9️⃣❌ retweeted
VERON@VERON_Nederland
Feb 10
Kom naar 46e Friese Radio Markt, dé ontmoetingsplek voor radiozendamateurs, elektronicaliefhebbers en techniekfans, op zaterdag 30 mei 2026 van 9 tot 15 uur in Zalencentrum De Buorskip aan de Vlaslaan 26 in Beetsterzwaag veron.nl/nieuws/de-46e-fries… #RadioIsMagie #BeleefHetMetDeVERON
2
3
252
Some Cobweb antennas have a 1:4 balun transforms impedance and blocks common mode currents. You can recognize those baluns as built on two separate ferrite toroids. My AWK Cobweb only has a single toroid 1:4 transformer built on a single toroid. To work properly... (1/2)
1
5
53
1,631
I added a home made common mode choke (left in the picture). (2/2) based on a FT240-61 toroid with 12 bisectional turns of PTFE insulated wire. #hamradio
1
8
282
Load more