Archive for the 'hamradio' category

This is what we heard on 11th July in Budapest:

As I couldn’t find any information on the web about the heat generated by the new Wouxun KG-UV8D in cross-band repeater mode, I thought I’ll share the information with my precious readers. :) So, if you use both bands in the low output power (0.5W) mode, the radio gets very hot in about 10 minutes […]

Github I started using Github in the past few months for hosting my hobby projects. Here’s the list of my current repos: nweather-wordpress-plugin: WordPress plugin which shows graphs from data uploaded by nweather-upload. nbackup: A simple backup script which uses rsync or rdiff-backup over SSH to back up directories. ntimelapse: Scripts for processing webcam and […]

There was a planned contact with the ISS during the morning hours which could be heard from across Europe. I recorded in this video what I heard from Budapest.

Renewed PSU

Finally I’ve finished my old PSU’s renewal. I added overvoltage protection and a slim fan which is switched on by bimetal thermostats on the heatsinks when the temperature reaches 45°C. I bought both the slim fan and the thermostats on eBay. The overvoltage protection is a very simple circuit: when the voltage is above a […]

I’ve finished the shiny new webpage of our radio club:

Last weekend we installed Ubiquity AirGrid M5s to the Gerecse tower and my QTH in Tata to create a 5Ghz Wifi link between them. It was quite difficult to put the stuff up on the tower because the wind was blowing crazy. Link works reliably and fast, the average is around 120MBps, I can copy […]

Nagoya BA-6200

I bought this antenna on eBay about a week ago and installed it on the mast on the roof at my girlfriend’s place. Price and quality is quite good, looks like the exact Chinese copy of the Diamond X200, but I had to use some silicon paste on the connections to ensure no water could […]

I’ve finished the new ham DSP tutorial section about SSTV modulation and demodulation. Here’s a video which shows my decoder compared to MMSSTV:

I already wrote about lowpass filtering using FFT in one of my ham DSP tutorial articles. The simple brickwall filtering method described there is not applicable in some cases because it introduces ringing in the resulting filtered sound. After some research, I made an article about designing and implementing a proper FIR filter which uses […]

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I'm Nonoo. This is my blog about music, sounds, filmmaking, amateur radio, computers, programming, electronics and other things I'm obsessed with. ... »


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