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I saw an article a little while back. The article was a comprehensive list of reference sites, articles, books and data that you should clone onto a Raspberry Pi and place in a sealed metal box, so if

The Antuino is a very capable spectrum analyser. It has a few known limitations but you can scratch build it for less than 50 dollars and a few evenings. wrote:

Sorry, the TinySA is not open source. John

Bob - It was a fun board to build.? I sent you a message. 73, Justin B. KI5GKD

i also can only see good on one eye ... a good headband loupe and some practice and i can also solder smd parts dependingh on silkscreen and pcb design they nearly float to the right position (when

Hello ! try ferrite ring on the Nextion's power supply line. And shield the back of the screen with PCB, works well.

I use an unenhanced Nextion 5inch display with its own LM7805 supply. There is a high pitched whine that I don’t hear on my other ubitx that has a 3.2 inch Nextion. Both running CEC firmware. Tried

Justin…. I would like one also. $5 +/ whatever you decide. This looks like a nice project for a solder melt. -- Bob NZ2Z

Gerard Honestly its very hard to suppress a AM sideband without circuitry to do that. Let's try something different. Turn off the AM, see if you can find a harmonic. Also try different RF to see if

hello, I finally finished repairing un 8558B Spectral Analyzer found on E..y. and HP182T Oscilloscope. Reminder of the pb’s set: HS power supply, grilled resistors on horizontal deviation PCB,

Oops, I send to the wrong email addy. Sorry about that. this was meant for Bill. - f [email protected]> wrote:

Bill, The only time I used gilbert cell (NE602) was to build the 21 MHz to 29 MHz transponder. The nearest station would be at least 500 KM away and the Yagis of the bad boys would be pointing along

One question: Which is the transmit and receive bandwidth of the sBITX? How to buy or build one? (Without the Raspberry Pi, as the need for processing I have is much higher of what the Raspberry can

Thanks a lot! Reading the names of Farhan and Phil Karn makes me shiver! Wow!! You are the ones!!! Rafael

I should add that it's a transceiver design, not just a receiver. The DSP is done by a Raspberry Pi 4. The talk first presents a modification of the uBITX, then goes on to show a new design that

The sBITX is a simple hybrid SDR; it uses a conversion to 27 MHz, a crystal filter there, and then downconversion to a near-zero IF where the signal goes into an audio ADC. Here's a link to Farhan's

Hi everybody, I'm sorry, but after many messages, I also wanna know what sBITX is. This link does not give any clue. Any link with the actual video of Farhan speech? Thanks, Rafael

See /g/BITX20/topic/82011726

I guess I have not been following as closely as I should. But what is this sBITX? When I joined this group it was for the BITX 20, 40 or the uBITX. THANKS, AL KB4RA

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