The c sdk is a difficult to use. I am waiting for the Arduino support to arrive before starting to port. This will be a game changer.

Linear amplification with FETs is limited by the Rds, the resistance between the drain and the source when the MOSFET is turned on. To illustrate, lets imagine that the Rds is 2 ohms. Now, give 12v on

Howard, The tone spacing does not change the maths at all. Whether the tones are 100 khz apart or 1 khz apart, the IMD3 will still move up or down 3 times faster than the tones. Using tones that are 1

Howard, The idea of a stable, low-cost boot for QRP radios is long over due. I hope you or someone else does step in to fill this gap. I have been experimenting with different kinds of amplifier devic

Mark, The ubitx code is very dense. It does so many things crammed into a barely 2000 bytes of RAM that we couldn't afford add any libraries with code that we wouldn't use. Instead, we have hand optim

the circuit that you posted in the original post is from the transformer used on the PCB. it is a crazy wire-up because the transformer is mounted on a 6 pin DIP base. This is done so that the women w

Owen, the udp is a stateless protocol. However, the state and reliability can be built on top of it. The WSJT-X UDP protocol (with my cursorily reading of the headers) has this in-built. The duplicate

Thanks all, the NetworkMessage.hpp gave all the details. Now, off to c compiler...

I think it is a two way protocol. Do you think we can reply to a callsign?

I am trying to write a front end that can work on our ILI9341 display

Thanks, Evan

I am looking for any description of the udp protocol used by wsjt-x. Any idea what it can do?

The fonts used in the ubitx were optimised for poor sight. I used dark mode and the font was tweaked to be large with thick stems. I was a font developer 2 decades ago so I know a bit about this. I do

These days I use two irons: The temperature controlled Soldron for regular work and an ancient 50 watter for connectors and making chassis of copper clad pieces

They have released visual studio. This cpu has built-in support for debugging, something that was sorley missing in teensy and arduino boards. this means that you can place a break-point. it is really

Does the radio tune around? If yes, the Nano is fine. Did you, by mistake, fiddle with the contrast pot? Just try turning that up and down. The display is a standrd 16x2 LCD display. Ebay is full of t

VU2AAP, Amar, too uses a ubitx on QO100

All the connectors of v5 are retained exactly the same in v6. You only have to desolder the volume pot

Can someone port the agc and cw filter code from guido's usdx to ubitx? That would be interesting! Jerry, i will restore the wireup.

The new boards don't need any wireup. However, the circuit DOES show the pull-ups needed. - f