开云体育

That's what I am looking for too. Did you come up with a solution for this? And are your code changes public somewhere? Thx

That explains something I noticed with my code. The audio sounded fuller. That’s due to the filter skirt difference. -- 73, Mark, N8ME

Mark, I just remembered. The 40 mhz crystal filter is sharp on the upper sideband and shallow on the lower sideband. Using it as an upper sudeband filter will make the opposite sideband

Well, I hacked in the code to change the Local Oscillator (clock 1) between 40,035,000 (current default) for USB modes and 39,987,000 for LSB modes. Seems to work.? I still need to adjust the

Ah, Harry Nyquist ... I remember as an engineering student at North Dakota State University learning that Nyquist was a graduate of the University of North Dakota just up the road in Grand Forks.

I am thinking of doing it. I hadn't seen the comment in the code. I just thought I'd ask if there was some compelling reason not to try. Why spend a lot of time on something that you had already

I commented about this in the source code too, it can be done. I didn't do it. You want to give it a shot? - f

Ashar, Thanks for the reply. I think I'm finally starting to understand this. Related to this, I see that the sideband inversion for LSB is done in the DSP software. Was any consideration given to

I have the Sbitx V2 #108 for sale. Purchased at Hamvention. $325 w/o a Pi, $375 with the Pi installed. Plus split shipping. Also comes with 3D printed legs/stand and the HDMI plate that allows easy

Carl, That's because it boots into the RasPi OS. It has the sbitx info in the 2nd partition which is not readable by Windows. Put it in the Pi and boot up the radio. Hank W6IR

I finally got a new RPI installed and installed the RPI iOS. The link that HF signals gave me for the sbitx_iimage.rar extracts to be identical to the rpi iOS can you provide me a link to a valid

Mark, The bandwidth is limited by our crystal filter. I couldn't make it wider than 25 KHz. If, instead, we had used phasing method, we could have achieved a full 96 KHz spectrum display. I discarded

The sample rate appears to be 96 kHz, but the bandwidth is only 24 kHz. Shouldn't it be 48 kHz, half the sampling rate? Is this due to the overlap-discard processing? -- 73, Mark, N8ME

Impressive that the harmonics are NOT a problem.? ?I don't remember ever being much worried by them on my DE, either. I've seen those low low frequency spurious signals a lot.? ? I think changing

Gordon, Here are two spectra for 80 and 10 meters.? 10 seems to be the worst, with both lower-than-set frequency spurs and a higher 3rd harmonic: Based on the latest measurement, I may have a

Kind of old-school.? No rotary encoders or si5351s here.? Just L and C for the VFO.? https://soldersmoke.blogspot.com/2023/10/dial-scale-linearity-spreading-out.html 73? Bill N2CQR

I would like to get a project enclosure and have a cable out the back for the microphone cable on the radio. Have 2 jacks, one for the electrict microphone and the other for PTT. It would be nice to

You can certainly use an amplified CB mic. I’ve done that with Heathkit vacuum tube transmitters successfully. However, it’s probably considerably cheaper to just use the element that I found

Aaron beat me to it. A Mic with a preamp or I had co sidered just building a simple amplifier circuit with an adjustable gain pot and wiring it between the mic input and the circuit board. Either of

Rose, I’ve never tried the side tone for voice. I don’t know anything about that If I crank the mic gain up as high as you were saying, I’ll have terrible distortion. With the stock Mike