¿ªÔÆÌåÓý

That¡¯s a nice project¡­ but the schematic does not follow the board (R1 is on the opposite side of that ¡°made up¡± cap). Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ

Hello, Having some time I drew this probe. Length 3.5 cms. Your opinions It's inspired of Elektor cdt

LM2 should be shunted, otherwise you still have some kind of low pass filter at the input -- HBTE Files section: /g/HBTE/files Erik, PD0EK

Hello, Here where is LM2 on the bottom . To shunt or not ? See? Post #846 cdt

Re, other thing Do you think we can protect the input like on this vid¨¦o? Episode 22: simple DIY "RF input protector" - YouTube ( https://www.youtube.com/watch?v=umHGKbaBOu4 ) it's a Simple schematic

Hello, A little question: When I look at this documentation and the modification to be done on the SI4432 modules, I wonder if a short circuit is missing? It's wroten "tinysa can work above 150

Hello, It may not be necessary to change the ESP card and modify the pcb. There are videos that explain how to put an antenna on an ESP board that does not have an antenna connector. To be tested

The Teensy 4.1 would really be better for a spectrum analyzer, being you have the ability to use a variety of ADC options including the built in analog to digital converter (think analog devices

With JLPCB 4 layers were and are the same price as two.? 5 off 100mm x 100mm come to ?9.45 including postage (not sure if this includes tax). I think it might be worthwhile having JLPCB source and

dAVE? Good view for connections. I looked quickly and took the example of 3.3v Bad luck, the other legs aren¡¯t in the same place. It does not matter I will keep the current mounting in a plastic

Interesting find!? I had not seen the devkitC before, and nice that it is available with/without external antenna connection. Unfortunately it highlights one of the problems with the ESP32 in that

hello, After a little research, I see that if I want to use an antenna outside the box, I need an ESP with a small plug. something like that (4€) and an antenna (0.5€) it's will work? Carte De

Dave, Right now I¡¯m stuck at least two weeks for my tests. Indeed the thread on one of the modules SI4432 broke and wanting to re-knit smd came with it because everything is very small. So iI

Dave, Little time this day to devote to the analyzer. I was able to check another point, *the reference generator.* *It works very well with the different choices (1,2,4,10,15,30 mhz). a constant

I had to remind myself how this works before responding! The mode allows you to see the bandpass response of the SAW filters. Connect the reference signal to the SA input J14, and set a frequency of

Dave, Ha! There is progress. So I reloaded version _15 *Good new:The LOW sweep works on the SMA J14 socket, by injecting a signal I do have a peak.* The High sweep also works, I¡¯ll use it less. It

Hello, Results of tests Version _11? and version _15 see pictures Version _11? ?---> Only Sweep low Version _15? ----> Sweep low and High !!!! Conclusion: I think my sweep high must works because

Dave, Just at this time i was looking version 11 and 15 *I find version _11 is not for 4*SI4432* There is no variable *RF_Switch* in the program _11? --->>present in version _15 I have look

When you load in the code for _15 do you also upload the data files associated with that version to the ESP32?? There were some changes to the web pages and the way the data is transferred via

Sorry for point 1, it's the view *WEB* cdt