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Voice Activated Squelch
From time to time I use to set the dial of my HF radio to some frequencies where voice QSO’s are expected - like local nets or WWF/SOTA/POTA.The noise is annoying for me and my family. One solution is...
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Last post on Blogger - Moving to Substack
Well...There are some years from my first blog post and Blogger was good untill it became too complicated to post photos and videos.Being a brave ham, I decided to move my public activities on...
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Lab599 TX-500MP
Finally, finally, she/he/it arrived while I am still in Wien (OE1)!It was a little adventure but now I am in the select circle of Lab599 TX-500 MP owners!I have it for just a few days but, man, oh,...
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Xiegu G90 squawk at high volume
On the G90 Groups is an interesting discussion about an audio feedback (squawk) at high volume.The subject is now locked but I think it will be a good added value to point to the source and the...
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Baofeng DM-32 Desktop Charger YPT-C21A
Baofeng DM-32 desktop "charger" isn't a proper charger but a desktop stand with a charging indicator.The charging circuit is built into the battery and powered by a 5V/1A power supply.Inside the...
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RF Ammeter to trim antennas
I started playing with End Fed Half Wave antennas this summer.While I found some interesting facts about high impedance Un-Un transformers used on this type of antennas I felt the need to proper tune...
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Baofeng DM-32 Desktop Charger YPT-C21A
Baofeng DM-32 desktop "charger" isn't a proper charger but a desktop stand with a charging indicator.The charging circuit is built into the battery and powered by a 5V/1A power supply.Inside the...
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"My SD card is not detected by the Marauder"
When using Marauder, an SD card it's a must.Unfortunately, the smallest SDcards i have are no less than 64GB so, according to the author, it will not work. Not so fast, mate!See? Where there is a...
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A GNSS Disciplined CTCSS, DCS and DTMF generator based on ESP32
Let me present a project to both show off and because it might be useful to others, a GNSS disciplined CTCSSDCS and DTMF generator. Why? How?This is the "bottom of the well" (from "out of the frying...
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Debugging ESP32 Timer Interrupts: A Tale of API Compatibility
The Silent Signal Generator Have you ever spent hours debugging code that should work but doesn't? Recently, I faced this exact challenge with an ESP32-based signal generator project. The symptoms...
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ESP32 Repeater Controller for Ham Repeaters
ESP32 REPEATER CONTROLLER MANUALUser Manual for Firmware Revision: R_1.0KEY FEATURESWiFi Connectivity: Access Point or Client mode for remote administration via Web browserDual Signal Detection: RSSI...
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Transmițătorul DSB „El Silbo” - AA1TJ
Michael Rainey, cunoscut sub indicativul AA1TJ, este un cunoscut operator radioamator american, inginer și pasionat de homebrew minimalist. Este celebru în comunitatea radioamatorilor pentru...
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Arduino Based Repeater Controller
A request from a fellow ham made me revisit an old project, and Arduino based repeater controller.This lead to an iterative process to upgrade it from a simple Carrier Detect repeater to a more...
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Project "Router" - 1
First is first...constintuartPins[4][2] = { {3, 1}, // PC: RX=GPIO3, TX=GPIO1 (default Serial) {16, 17}, // U_1: RX=GPIO 16, TX=GPIO 17 {18, 19}, // U_2: RX=GPIO 18, TX=GPIO19 {23, 5} // U_3:...
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ICOM IC-703+ de vanzare / For Sale
Primul meu ICOM IC-703+ este de vanzare!Dupa un eveniment distructiv accidental (o supravoltare datorita functionarii defectuoase a unei surse de laborator), m-am incumetat inainte de Craciunul lui...
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Xiegu G90 - O defectiune tipica
Micul transceiver Xiegu G90 este unul foarte indragit de radioamatorii carora le place sa iasa in natura. Forma sa compacta, cei 20 de W in toate benzile HF, antena-tunerul incorporat si plaja de...
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433 MHz LoRa SAW Bandpass Filter
The LoRa network that a team of radio amateurs in Bucharest is testing is - for various reasons - deployed in the 433 MHz ISM band.A check of the radio spectrum showed that in this band there is a...
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LoRa APRS with Meshtastic DevBoard
After I played a little with my Meshtastic Development Board I previously made (and write about) I decided it will be nice to give it a try into LoRa APRS.This raise some issues about how different...
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Heltec V3 versus LilyGo LoRa T V2 comparision table
These are two LoRa development boards and both are good for Meshtastic networks. LilyGo:Heltec T3 V2: Key TakeawaysHeltec V3 is a better choice if you need better power efficiency and are working on...
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Meshtastic ESP_32 DevBoard
Everyone know MESHTASTIC!It is the promise of a new communication meaning over long distances and without any infrastructure needed.Somethink preppers love!This communication system has two important...
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