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I would like to get the boards for constructing a sBITX, too. -Paul? K9MV

A Pico Pi is a big step up in capability from the current ATMEGA328. IMHO the uSDX is more of an exploration of what can be done that any sort of product like the uBITX or QCX. Guido, PE1NNZ,

Hi there, I'll buy a PCB Board, $5.00 plus whatever shipping will be.. Let me know, Paypal OK 73 Ron? W4RWU

I thought hard about current consumption. "We are no longer in Kansas". The modern LiPo battery with 3400 mA hours is cheap. At 14.4 volt battery will run sbitx for 5 hours. You can switch off the

So, Here are the figures : 1. Raspberry Pi4, with 4.3 inch waveshare screen (800 x 480 pixels, veru readable, like a smartphone), running sbitx = 540 mA. With wsjtx, 650 mA. 2. Rpi 4, with 7 inch

Mornin' Ken: Yep, and I get that if you're hiking 10 miles up a vertical cliff to a place where you have to carry in your own antenna mast to get the EFHW off the ground. That's their "thing" and

Jack, You should go spend some time on the FT-817/818 mail list - they obsess down to the smallest detail for saving power, to the point where it is considered "wasteful" to use a particular antenna

I get the "green" emphasis, but part of me wonders "why" when it comes to a transceiver. Yes, I do understand SOTA, POTA, IOTA, and the other OTA's and I indeed hope to be a part of that this summer,

The capabilities and included functions of an RPi PICO are so drastically reduced compared to an RPi 3 or 4 that there is almost no comparison. That said, for its original design, an RPi at the heart

There is an effort to port the code to a Pico Pi which has dual cores and much better capabilities, but is still a controller and much less power hungry than other Pi

Raspberry Pi power consumption figures: https://www.raspberrypi.org/documentation/hardware/raspberrypi/power/README.md RPi 4 consumes about 600 ma, or about 3 watts at 5 volts Raspberry Pi Official

Hello Richard, You are correct in the assumption that it is not needed for the Nextion display implementation, nor anything else on the ?BITX. I would check that you have not connected the power

Arv, Thanks so much for the links. I've been improving my vacuum plumbing and have been able to into the high single digit micron range. May try electrically heating and evaporating titanium wire to

I too would be interested in actual performance data, most importantly the efficiency data.? Efficient portable SSB operation was the original goal of the ?SDX, gaining the Class E power efficiency

Hello to list: I have a uBitx3 running CEC firmware and the Nextion 3.5 display. I have noted that the contrast potentiometer on the Raduino gets VERY hot. I see from the schematic that it should be

When someone finishes the usdx build, I would like them to measure the opposite sideband and the audio distortion. I am curious how well it works. - f justin.bowser@...>

Robert, I have the boards and have completed one and it works nicely!? If you still want one, or two let me know.? I have not hooked up a mic and transmitted yet but the receiver works great.?

Actually, it looks like Mouser beat me to it. They now have a system where you can upload a spreadsheet... - Jerry

WWV audio tones are at known audio frequencies. Multiple applications can very accurately measure the audio frequencies, such as freely available FLDGI Tune in WWV and adjust the dial until the audio

One catch is that the economies of scale of buying SMD parts can be huge. It's sometimes cheaper to buy 10 parts than to buy 2, and sometimes cheaper to buy 100 parts than to buy 20. The unit price