ON3JT

The last High Altitude Balloon this year.

Joost — Fri, 31 Dec 2021 16:12:28 +0000

I’m a member of a Facebook group called HAB-NL (HAB stands for High Altitude Ballooning). There was a post announcing the launch of a balloon in Den Haag (The Hague), …

The post The last High Altitude Balloon this year. first appeared on ON3JT.

ISS SSTV Transmissions December 2021

Joost — Fri, 31 Dec 2021 09:56:52 +0000

I was made aware of the ARISS Event below : December 21, 2021— An ARISS Slow Scan TV (SSTV) event is scheduled from the International Space Station (ISS). The event …

The post ISS SSTV Transmissions December 2021 first appeared on ON3JT.

Synology Drive Client sync problem

Joost — Sun, 15 Nov 2020 13:28:54 +0000

Now that TransIP is discontinuing their Stack product (1 TB free storage) I had to look for another tool to sync my Arduino sketches across different machines. You have Idrive …

The post Synology Drive Client sync problem first appeared on ON3JT.

Still alive

Joost — Sat, 31 Oct 2020 21:16:46 +0000

I’m still alive and doing ham radio stuff. But can’t find the time or motivation to write it all down in this blog. So a small summary so far : …

The post Still alive first appeared on ON3JT.

Reception test with radiosonde antenna

Joost — Mon, 13 Apr 2020 08:07:46 +0000

Yesterday I made the antenna a bit more weatherproof. Not quite happy with the outcome as the box didn’t fit the way I liked it. It is still a prototype, …

The post Reception test with radiosonde antenna first appeared on ON3JT.

Antenna for RadioSonde RX

Joost — Fri, 03 Apr 2020 20:15:35 +0000

Last week I built my first prototype. Since last december I started tracking radiosondes in the 400 MHz band. I use the Diamond X50 antenna on the roof, connected to …

The post Antenna for RadioSonde RX first appeared on ON3JT.

UBA Spring contest 80M

Joost — Sun, 22 Mar 2020 09:04:29 +0000

I had a qso yesterday with ON5RZ/P, not really portable but bicycle mobile. He mentioned the contest. After downloading SD and a crash course later I was ready. I participated …

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First test with RTL-SDR v3 stick

Joost — Sat, 11 Jan 2020 07:28:53 +0000

Ordered this stick on december 28th ont he RTL-SDR website and it arrived yesterday. This is my 4th dongle 🙂 I bought earlier a very cheap DVB-T dongle (black) that …

The post First test with RTL-SDR v3 stick first appeared on ON3JT.

Conditions on VHF

Joost — Mon, 30 Dec 2019 06:27:58 +0000

It started with this newsitem on Hamnieuws.nl (in Dutch) : https://hamnieuws.nl/afstandsrecord-op-432-mhz-alweer-verbroken/ Seems that there were conditions on VHF and UHF. I didn’t have any all mode transceivers for V/UHF nor …

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SAQ reception Christmas 2019

Joost — Tue, 24 Dec 2019 08:47:58 +0000

I was convinced that my ZS6BKW antenna connected to the soundcard input was good enough to receive SAQ on 17,2 kHz. When tuning started around 8:30 local time I noticed …

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