http://wiki.pa2dk.nl/ 2026-06-24T20:20:39+00:00 http://wiki.pa2dk.nl/ http://wiki.pa2dk.nl/lib/exe/fetch.php?media=wiki:dokuwiki.svg text/html 2024-01-24T21:24:16+00:00 Anonymous (anonymous@undisclosed.example.com) http://wiki.pa2dk.nl/doku.php?id=diversity_with_2x_kenwood_ts590sg&rev=1706131456&do=diff Diversity RX with 2x Kenwood TS590SG 2 Kenwood TS590SG tranceivers can be connected together and one can function as subreceiver. This is very useful when using a separate RX antenna. Firmware 1.04 minimum required. See manual page 60 - 61 of the TRX to see how to connect two of them. text/html 2023-11-30T22:26:05+00:00 Anonymous (anonymous@undisclosed.example.com) http://wiki.pa2dk.nl/doku.php?id=gpsdo&rev=1701383165&do=diff GPSDO Veron A32 GPSDO project Atmega 328P Burn the bootloader and upload the firmware using an USBasp programmer. Burn bootloader Download breadboard-1-6-x.zip from ArduinoToBreadboard Create a folder named hardware in the Arduino sketchbook folder and extract the breadboard folder into it. Make sure USBasp is using driver text/html 2024-02-17T19:50:39+00:00 Anonymous (anonymous@undisclosed.example.com) http://wiki.pa2dk.nl/doku.php?id=lifepo4_battery_packs&rev=1708199439&do=diff LiFePO4 battery packs Building some battery packs for /P activities. After a year of usage I concluded my 20ah Lead-acid battery is not fit for the purpose of power source for hamradio portable operations. Links EVE C40 40135 20ah Charger Power poles Balancer cables 4S 30cm Battery alarm Insulation paper 4s2p battery bracket for 40135 cells Powerpole assembly Box text/html 2023-11-19T20:16:01+00:00 Anonymous (anonymous@undisclosed.example.com) http://wiki.pa2dk.nl/doku.php?id=remote_antenna_switch&rev=1700424961&do=diff Remote antenna switch Building a remote antenna switch using ESP32. Idea comes from seeing this picture. I'm using REW15 relays because they are affordable and easy to work with. More info about these relays. Links Client software Server software DXLog plugin text/html 2023-11-26T14:31:06+00:00 Anonymous (anonymous@undisclosed.example.com) http://wiki.pa2dk.nl/doku.php?id=rotor_control&rev=1701009066&do=diff Rotor Control <https://github.com/dh1tw/remoteRotator> text/html 2024-05-25T21:45:43+00:00 Anonymous (anonymous@undisclosed.example.com) http://wiki.pa2dk.nl/doku.php?id=start&rev=1716673543&do=diff Completed * Random wire antenna * Diversity RX with 2x Kenwood TS590SG (Prototype) * LiFePO4 battery packs In Progress On Hold * GPSDO (On Hold) * Remote antenna switch (On Hold) * Rotor Control (On Hold) * Symmetrical L tuner (On Hold) Ideas * Hacksaw blade sideswiper * Linked Dipole * APRS Weather station Notes * QRSS notes * DXLog notes * QMX notes Tube receiver restauration * NSF 234A * B5X42A/03 * <https://www.jukebox-revival.eu/nl/producten/conden… text/html 2023-11-28T20:59:21+00:00 Anonymous (anonymous@undisclosed.example.com) http://wiki.pa2dk.nl/doku.php?id=symmetrical_l_tuner&rev=1701205161&do=diff Symmetrical L tuner Stepper motor control with DRV8825 <https://www.pololu.com/product/2133> <https://www.makerguides.com/drv8825-stepper-motor-driver-arduino-tutorial/> <https://www.123-3d.nl/123-3D-Stepstick-DRV8825-stappenmotordriver-i96-t39127.html>