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

HF, VHF & UHF
Joined September 2010
Photo by 🅿️🅰️9️⃣❌ (@PA9X)Photo by 🅿️🅰️9️⃣❌ (@PA9X)Photo by 🅿️🅰️9️⃣❌ (@PA9X)Photo by 🅿️🅰️9️⃣❌ (@PA9X)Photo by 🅿️🅰️9️⃣❌ (@PA9X)Photo by 🅿️🅰️9️⃣❌ (@PA9X)Photo by 🅿️🅰️9️⃣❌ (@PA9X)Photo by 🅿️🅰️9️⃣❌ (@PA9X)Photo by 🅿️🅰️9️⃣❌ (@PA9X)Photo by 🅿️🅰️9️⃣❌ (@PA9X)
🅿️🅰️9️⃣❌ retweeted
Heard this the last two nights (last night drifting about quite a bit) on 850 khz. I think it's Peru but not sure if Pachamama or Corporacion Famicarr. If anyone can help? Any thoughts on the musical style / talk welcome.
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Op 2 maart is er in Vlaardingen weer een verkoping met o.a. mooie apparatuur uit een nalatenschap. Een deel ervan kan direct gekocht worden of op geboden worden, of je slaat je slag op de veilingavond. Meer info op de website van VERON Nieuwe Waterweg. a59.veron.nl/verkoping-dinsd…
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🅿️🅰️9️⃣❌ retweeted
For a driver, it’s just an ordinary number. For a MWDXer, it’s a completely different story… 😎📻 648 AM = Radio Caroline! #MWDX #RadioCaroline #648AM #MediumWave #DXing
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XYL now also content with the retractable Geroh mast.
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I added a feature to my weblog, that extracts SNR measurements from the PI4VNW webSDR every hour. Clearly the SNR fluctuates when D-layer absorption appears and disappears. #hamradio pa9x.com/websdr-snr-measurem…
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I deployed it to feed a 2x 14m inverted V doublet through about 10m 300 Ohm open line. Because this is a asymmetric tuner, I inserted a 1:1 tuner balun built on two stacked FT240-43 toroids. #hamradio
In search for a QRO remote tuner I ordered this model. Hooked it up yesterday. First impression is good. Soon more... #hamradio
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In search for a QRO remote tuner I ordered this model. Hooked it up yesterday. First impression is good. Soon more... #hamradio
I guess MFJ left a void when production of the MFF-994BRT QRO remote tuner ceased. DX-World Electronics now offers a 1200W remote tuner that can be controlled via web interface. #hamradio dxworld-e.com/product-page/h…
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Any suggestions for a bias tee injector max 1 amp at 12V and 200W RF?
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I guess MFJ left a void when production of the MFF-994BRT QRO remote tuner ceased. DX-World Electronics now offers a 1200W remote tuner that can be controlled via web interface. #hamradio dxworld-e.com/product-page/h…
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I downloaded the FT8AT app for my Android phone and connected my FTDX10 with the USB port. Setup took 15 seconds and I went live. Great for portable use. ft8af.app/ #hamradio
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mAT has a new 1500W remote auto tuner: mAT-1500R. I assume it's their 1500 ProII tuner put into a weatherproof box. Anyone like to share their experience with that 1500 ProII tuner? #hamradio mat-tuner.com/mAT-1500R.php
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🅿️🅰️9️⃣❌ retweeted
Het is weer die tijd dat de Perseïden zich laten zien, de meteorenzwerm die elk jaar langs de aarde scheert. De meteorenzwerm Perseïden bereikt op 12 augustus 2026 wellicht zijn maximum. Samen met de zonsverduistering. veron.nl/nieuws/het-is-weer-… #RadioIsMagie #BeleefHetMetDeVERON
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More testing shows SWR not in the red on 80m, 17m, 12m and a part of 10m. The doublet's dimensions are close to a ZS6BKW, showing more or less similar results.
Running the 2x 14m doublet for some tests. By luck, it's resonant on 20 meters with a decent SWR. No tuner needed so no losses. #hamradio
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Running the 2x 14m doublet for some tests. By luck, it's resonant on 20 meters with a decent SWR. No tuner needed so no losses. #hamradio
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Night out with my son. #metal
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Got the 9m Geroh retractable mast mounted onto a 60mm steel pipe, anchored into 200kg 1m deel concrete. On top of the mast a 1.5m fiberglass section which holds the feed point of a 2x 14m leg doublet. Fed with 10.5m 300 Ohm open line and a CG-3000 remote tuner. #hamradio
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Recorded this remarkable local QRM at a friend's urban QTH. Not a specific pattern. It comes and goes throughout the day and is strongest on 80m. Anyone recognize this? Recorded in SSB. #hamradio #qrm pa9x.com/audio/qrm-80m-band-…
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The 9m retractable Geroh mast from surplus-elektronik.de arrived yesterday. Next up is digging a hole, pouring a concrete base with 2" inch steel pipe and assembling a tilt mechanism. #hamradio
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