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Søren Kjærsgaard

@oz1lqo@techhub.social
  • Open on techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo@techhub.social (above mentioned rules applies there as well)

648 Followers
61 Following
33 Posts
Joined November 19, 2022

Posts

Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · Jun 03, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social

#hamradio /P trip with friends, and 🐴 (also friends ☺️). My LNR did amazingly well, so I had to check the power output when I got back - 1.7W 🤩
#cwops #portableops #qrp

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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · May 28, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @bbeaker@toot.community
@bbeaker@toot.community @Ea5iyl@mastodon.radio I actually had a 8086 based PC, I replaced it with a V30 and added a 8087. Took me safely through university ☺️☺️
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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · May 28, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social

Those who know, knows ☺️☺️

#electronics #vintagecomputers

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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · May 20, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social

Happy world #metrologday I’m celebrating by making noise measurements on a range of voltage references I’ve had powered for more than a year ☺️🥳 worldmetrologyday.org

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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · May 16, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social

I tested the R-532 sensitivity, found a ‘vacant’ channel. Vacant, as in no spurs or external disturbances. It shows 236nV for 10dB S+N/N at 30% modulation depth, that’s REALLY good for a 1984 unit 😳

But it coincides well with the last couple days on-air tests, it’s as sensitive as my other receivers.

This is a keeper! 🥰🤩

#rfengineer #aviationgeek #testandmeasurement #hamradio

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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · May 14, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social

Look what came my way!! The legendary R-532 Airband receiver, all discrete, no MCU. And it works flawlessly!
Needed a cleanup and a backup battery replacement (luckily no leaks!) but at just EUR 20, this was a total nobrainer. It was manufactured between 1984 and 1987, so they’re really hard to find these days.
Can’t believe my luck here 🤷🏼‍♂️🤯

#hamradio #airbands #aviationgeek #rfengineer

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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · May 11, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @oz1lqo@techhub.social
@marsik@witter.cz @g7vkq@mastodon.radio BTW., this is how the now disabled 50kW transmitter looked, I visited it some years ago.
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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · May 11, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @marsik@witter.cz
@marsik@witter.cz @g7vkq@mastodon.radio true about the single point of fail, although if you rule out a direct enemy strike, where everything would change, it was actually quite stable throughout its many years of service. I totally agree with the regional argument though, the FM towers are much better for that purpose, and it’s my impression that exactly this has been planned for by our municipalities 🙂
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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · May 10, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @g7vkq@mastodon.radio
@g7vkq@mastodon.radio At least it seems we get to keep FM, now that they’re promoting it for distress information 🤷🏼‍♂️☺️
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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · May 10, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @g7vkq@mastodon.radio
@g7vkq@mastodon.radio a couple of years back, the Danish service at 243kHz shut down. It was only 50kW, but the quality was pristine all over the country 🙂 In the meantime, we’ve all been told to go prepper style and buy small emergency radio receivers - this single transmitter would’ve covered the entire country from a single location 🤷🏼‍♂️🤦🏼‍♂️😢
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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · May 10, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @gmoretti@mastodon.social
@gmoretti@mastodon.social and yes, I matched the transistors from a larger batch ☺️
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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · May 10, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @gmoretti@mastodon.social
@gmoretti@mastodon.social Yah, it’s a super simple setup, based on an Elektor article from early 2000’s… I don’t know how the frequency response is, but wanted to try it out, just for the vintage part and just to see how 12 vindings on a 30cm embroidery hoop would perform. It certainly works - it’s almost magical ☺️🙏🏼
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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · May 10, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social

Loop antennas are almost unreal… 🤷🏼‍♂️😂 It seems almost divine that 12 turns on an embroidery hoop and a simple amplifier would let me receive BBC Radio4 on 198kHz hours after sunrise - so much more appropriate to listen to the ‘Sunday Worship’ broadcast 🙏🏼☺️

I’ve always enjoyed listening to 198kHz from my car - it makes me kinda sad they’re planning to discontinue their LW transmissions 😢 LW crosses borders, it works with a simple setup, independent of an internet connection.

Tonight, when the bands open after sunset, I’ll experiment more 🙂🙂

#hamradio #swl #rfengineer

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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · May 09, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @zl2tod@mastodon.online
@zl2tod@mastodon.online as it turns out, a local distributor actually had NOS 🤷🏼‍♂️🤩
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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · May 09, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social

Next step in my vintage SWL loop #antenna, the amplifier. The design is really simple and I’m using vintage BF494 and BF451 transistors 👴🏻☺️
#hamradio #swl #rfengineer

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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · May 05, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social

The all time classic 555 timer turns 55y this year, originally released by Signetics in 1971.

Lets celebrate by building a classic 555 circuit: the astable multivibrator 🥳🙂

#electronics #electronicsengineering #rfengineer #hamradio

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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · May 01, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @dennis_melhede@holos.melhede.net
@dennis_melhede@holos.melhede.net A connector saver does nothing but replicate the original connector into something much cheaper, and easier to replace if damaged. They’re typically used on devices where a connector damage would be catastrophic and/or horribly difficult and expensive to repair. On spectrum analyzers where the connector is plugged/unplugged all the time, it’s not uncommon to use high-quality DC blocks as connector savers. Albeit expensive, they’re much, much, cheaper than the instrument and they provide an extra safety against damage from DC (where one, single, capacitor inside the instrument is your only guard against a horrible day at the office 😂)
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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · May 01, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social

Connector savers are something you might want to use with your precious gear - in this case, for my R-8600 receiver ☺️☺️ #rfengineering #rfengineer #hamradio #SIGINT

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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · Apr 30, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @ftg@mastodon.radio
@ftg@mastodon.radio Yah, occasionally you bump into them, as I did now ☺️
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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · Apr 29, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social

Found a cheap batch of the BLK-89-S+ DC Block from #minicircuits - wondered if they were usable at near-VLF frequencies (they’re specified from 100kHz-8Ghz).
They turned out quite acceptable 👍🏼🙂🙂
I don’t need that many, at all 😂, but it was a bargain and I’ll likely sell some of them once I’m done with the tests.
Amazing you can make an almost flat frequency response that wide 😳 They’re NOS from 2013, but they don’t seem to age, shelf life is ‘eternal’ on these devices ☺️

#hamradio #rfengineer #vlf

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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · Apr 26, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social

Inspired by a 26y old article, I’m building a small loop, which with a suitable amplifier, might turn into a decent shortwave/BC antenna ☺️
#hamradio #rfengineering #rfengineer #shortwavelistening

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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · Apr 15, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @hennichodernich@radiosocial.de
@hennichodernich@radiosocial.de I was told that it was new in the sense that ‘the N-Conn had never been used before’… I trust this, the person had no reason so say otherwise 🙂
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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · Apr 14, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @DD3AH@social.darc.de
@DD3AH@social.darc.de Wasn’t my radio, so I don’t know the history behind it, but generally I use connector savers on my most precious gear ☺️
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oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · Apr 14, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @kr1st@mastodon.radio
@kr1st@mastodon.radio not my radio but yes, that was my first reaction as well (PL insertion). I have N ‘connector savers’ on some of my radios and more precious instruments. Just in case ☺️
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oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · Apr 14, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @IU1KGS@mastodon.radio
@IU1KGS@mastodon.radio Actual reason is unknown, it didn’t come out of my radio, but yes, that was my first reaction as well 🙂
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oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · Apr 14, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social

Well that’s not supposed to happen 🤷🏼‍♂️😂

Came from a brand new radio - I guess their quality control failed, - or caused it 🙂

#hamradio #tfengineer #rfengineering

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oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · Apr 10, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @FediFollows@social.growyourown.services
@FediFollows @hamradio @meshtastic @ARISS_Intl @gnuradio @dlarc @openrtx Thanks! I’m trying to build a small technical community around my many experiments - so far with great success, I always get a positive response and feedback to my posts ☺️
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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · Apr 03, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @dj3ei@mastodon.radio
@dj3ei@mastodon.radio @kf7ccc@mastodon.radio I did exactly that before I shot the video. It’s gravity 🙂
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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · Apr 02, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @kf7ccc@mastodon.radio
@kf7ccc@mastodon.radio those were the days 🥰 That was (likely) due the the earths magnetic field, and not a gravitational pull of the electron beam ☺️
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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · Apr 01, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @Quantensalat@scicomm.xyz
@Quantensalat@scicomm.xyz might wery well be… 😂
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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · Apr 01, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social

Did you know that crystal oscillators are orientation dependent? Well they are 😎

Albeit in the milliHz range for a 10MHz OCXO, the frequency change is completely measurable when you rotate the unit and change the crystals reference to earths gravity 🙂🙂

#rfengineering #hamradio #testandmeasurement

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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · Mar 11, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social
Replying to @sev@bonn.social
@sev@bonn.social you’re welcome, it was harder than I thought (although in principle quite simple), because it’s so sensitive to external noise 🙂 But it shows that you can actually prove at home, that light has particle behavior - I find that really cool 😎🤩
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Open post
oz1lqo
Søren Kjærsgaard @oz1lqo@techhub.social · Mar 11, 2026
Søren Kjærsgaard
@oz1lqo@techhub.social

I work with RF and Antennas. Passionate about hamradio, radio systems and electronics. I also really like orienteering and jogs in the local woods🙂 Stoic 👍🏼
This account is mainly focused on the above and (very) little else. 
Throw politics, conspiracies and hateful stuff at me and I’ll block you. There will be no warning, no explanation, no coming back. 
Want to see all the fun things I do in my lab? 😎 Check my IG, @oz1lqo (above mentioned rules applies there as well)

techhub.social

Driving a LED at sub-nA currents, allows me to measure single photons, thereby proving that light acts like small energy bunches 👌🏼😎😎

See my previous video if you want to know more about the setup and the PMT (Photo Multiplier Tube)

#stem #physics #testandmeasurement #quantumphysics

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