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amazing. Gordon KX4Z

Mark, I thought (without really confirming this) that the rpi zero is 32 bit and hence it will work much faster with single precision math hence decided on single precision fft The fftw library

I think I figured it out. The agc2() routine was only adjusting the imaginary part. I changed it to work on the real part and it works. -- 73, Mark, N8ME

I am hoping that someone could help me out and provide me with a link on where I can purchase a Baofeng microphone. I'm referring to the one that comes with the uBITX, the hand microphone that looks

https://www.qrp-labs.com/images/qdx/manual_1_19.pdf The sBitx appears to be using the same improved inductors that the QDX switched to after early problems. ?But I’m still seeing some bleed

I noticed that the stock firmware uses both the standard (double) and float FFTW3 libraries. The install instructions have you build both library versions. It looks like the float libraries are only

Thanks. You mentioned you maintain a fork of WiriingPi. I've heard that the reason Raspberry Pi dropped it from their repo's was because the original developer stopped work on the project. Do you

P.S. The frequency didn't change on the sBitx. -- 73, Mark, N8ME

Thanks for the reply.? I typed "f 7050" into the telnet client and the screenshot shows what I got. -- 73, Mark, N8ME

In the light of what Evan pointed out about the inductors series resonances in another project, consider the trace below. ? This is the transfer function from the input of the switched low pass

The commands are the labels on the controls. For instance "RIT ON" or "RIT OFF".

Try "f 7050" to change to 7050 khz. "m usb", etc.

Looking in the source code file remote.c, I see that sBitx supports a telnet server on port 8081. Using the telnet client built into Windows 10, I can connect to the server about 1 time in 3. When it

Evan, I’m also noticing those inductors!! I sure hope we get to the bottom of this.

sBITX V2 TX problems Have received a new sBitx V2. RX is OK! TX no output, no matter in which mode. PTT switches correctly! Hardware is OK, works with software V1 without problems. Faulty

Gordon, The early QDX kit builders (I was one) had to rework the first released boards of the QDX to remove four SMD 47uH chokes and replace them with through-hole inductors.? The reason given was

1.? This thread has been running since Oct 6, now 15 days.? ?Many, many sets of data have been presented, including photos of the measurement setup.? ?There were initial unforced errors due to a

I’m trying to understand the receive filtering in sBitx. I’ve been studying and experimenting with Ashar’s well commented code in the function rx_process in sBitx.c. As I understand it, the

This site’s data graph suggests that some of these diodes could work in our application. Do we just have some bad ringers? https://www.qsl.net/in3otd/electronics/PIN_diodes/1N4007.html