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Welcome to egimoto.com

A modest techology blog

Electronics & RF

by @OE3TEC · 8 hours ago
Warning: Since this article got so many views, I have to inform you that modifying your radio to transmit with higher power or out of the CB-band is illegal if you are not a ham. In addition: Warranty void Info: This article is regularly updated with new
by @OE3TEC · 26th Oct 20
Analog SSTV is still very popular on many ham bands and on CB. One way is to use mobile apps for receiving and transmitting pictures but this “acoustic coupling” between the radio and the encoder / decoder can reduce the image quality. Therefore, using an
by @OE3TEC · 22nd Oct 20
When googling “packet radio soundcardmodem” you normally find solutions, which use Paxon with FlexNet. Unfortunately, FlexNet is very old and difficult to run on Windows 10. Due to this situation I searched for alternatives and found Dire Wolf. This sound
by @OE3TEC · 14th Oct 20
On this beautiful sunny day Alex informed me that the start of a new M20 sonde is planned and the landing site should be near my QTH. So, I immediately got ready by loding all my direction-finding equipment in addition to my radiosonde tools into my car b

Software Dev

by @PreyMa · a day ago
You read the title correctly in this article I write about, how I implemented a naive dynamic memory allocator and some other facilities of the C standard library in Scratch of all languages. And no I didn’t use any JavaScript scripting to add custom func
by @PreyMa · 9 days ago
Yes, I’m fully aware that I’m entering cursed lands. But still, I wanted to share this experience with the world, that is the result of a grumpy rant on garbage collected languages. The Scratch programming language is designed for beginners of young age
by @PreyMa · 22 days ago
Yesterday's test at my university covered codes as one of its topics. As an example, EAN13 codes or barcodes as they are commonly known respectively were brought up. While preparing for the test we practiced verifying them and calculating missing digits.
by @PreyMa · 14th Oct 20
In the latest episode of our endeavor to create a Brainfuck meta-compiler we got a first working version and learned about some interesting behaviors of the v8 JIT optimizer. When leaving off, I mentioned that there are still many opportunities left to im

Blog

by @OE3TEC · 17 days ago
changpuak.ch: Antenna and filter calculators classeradio.com: Class E AM Transmitter Descriptions, Circuits, Etc. VK1SV: Class-E for beginners dmitrynizh.com: Create Spice Models for tubes b-kainka.de: Electronic projects funknetzplanung.com: RF-Cal
by @OE3TEC · 19 days ago
On Halloween we hold our second activity day for this month. We planned to do some SSTV and Packet radio in addition to talking but unfortunately the car of OM Nebi broke. Therefore, only two stations (AT3TEC, AT3BO1) were available on PR plus Nebi rode a
by @OE3TEC · a month ago
Saturday was a perfect day for going on air on CB from my local breaker hill called Sauberg (JN88AM). It was a calm, sunny and warm fall day, so I put up my big 9m antenna (Gain Master replica) which allowed me to hear every station that joined our group.
by @OE3TEC · 23rd Jul 20
Sebastian, Matthias and I decided to stop at the shortwave station in Moosbrunn, Lower Austria while driving to Graz. In recent years, this station became well known for transmitting Radio DARC with a power of 100kW on Sundays. We only took some photos of