Agustin

Electronics, DSP, Ham Radio, DIY, Linux, 3D printing

[Agustin @lu2hes]

@danis_963 @ure_es 😂 gracias danis

[Agustin @lu2hes]

@LU1AAT La tengo y es muy buena, tiene batería interna recargable con USB-C, cubre todas las bandas hasta UHF y tiene muchísimas funciones.
La contra es que para hacer SWL no tiene mucha sensibilidad, es 100% DSP.

[Agustin @lu2hes]

@edufortes Muy bien la verdad, lo que me hizo renegar un poco es hacer andar VARA con wine. También lo trate de usar con ARDOP pero no hay nodos en la zona.

[Agustin @lu2hes]

Sending and receiving mail using winlink and my ubitx on 20m band.
I am connected to a node located in Chile almost 900km away, no internet connection needed!

[Agustin @lu2hes]

@tinchomarchetti Próximo paso jaja
El mismo sistema lo usan los barcos para comunicarse, se llama sailmail, para que lo tengas en cuenta

[Agustin @lu2hes]

@GreatScottLab I used a cheap Bluetooth module and a class D audio amplifier for the electronics.

[Agustin @lu2hes]

@GreatScottLab Nice work!
I did something similar a year ago, but in my case the radio was in bad shape, so I had to paint it and create 3D printed parts to mount everything inside.

[Agustin @lu2hes]

Great work @ryzerth !

[Agustin @lu2hes]

Tested SDR++ in my Android tablet using airspy HF discovery. Really impressed!
It runs very stable and smooth, the pen is useful to fine tune things in the interface.

[Agustin @lu2hes]

@tinchomarchetti 😅

[Agustin @lu2hes]

The expansion board (cw filter, automatic volume control and cw lock detector) is finally mounted in the ubitx. I designed and 3d printed the mount for the cabinet.

https://t.co/e8snIlcwLR

[Agustin @lu2hes]

Expansion board for ubitx ready, includes CW filter, PLL to indicate received signal is in band, and automatic volume control (using a LED and a photo resistor in parallel with the volume knob)

[Agustin @lu2hes]

CW filter and lock detector working

[Agustin @lu2hes]

Finally I have time to integrate the expansion board into the ubitx, I started adding two switches and a LED to the front panel https://t.co/azI0efzUAk

[Agustin @lu2hes]

Expansion board for ubitx ready, includes CW filter, PLL to indicate received signal is in band, and automatic volume control (using a LED and a photo resistor in parallel with the volume knob)

[Agustin @lu2hes]

@edufortes Si tal cual me fijé en pskreporter y esta casi todo en 40m pero justo tenía armado el dipolo para 10 y quería probar ja

[Agustin @lu2hes]

First steps using JS8call on 10m, not a lot of activity but enough to get familiar with the protocol

[Agustin @lu2hes]

@toybuilder I always draw the circuit first to create the layout, but there is a lot of improvisation then when soldering it. 😅

[Agustin @lu2hes]

Expansion board for ubitx ready, includes CW filter, PLL to indicate received signal is in band, and automatic volume control (using a LED and a photo resistor in parallel with the volume knob)

[Agustin @lu2hes]

Next step is the integration into the transceiver, adding some switches to the front panel to enable/disable filter and AVC.

[Agustin @lu2hes]

The work to improve ubitx CW capabilities continues, adding a PLL using LM567 to indicate if the received signal is within the filter's passband.