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Hi Joe Hmm, been several months since last comment, time fly's! I would highly recommend checking out Charlie Morris SDR projects, he has some great YouTube tutorials too. My efforts are built from this project...

Hi Derek The unit is only tidy on the outside :) using the ILI9341 3.5" with adafruit lib, has lots of nice fonts to choose. The serial interface does generate RFI though. Interest is mainly your audioSDR functions. My first coding attempt with PJRC audio library was a simple DC IF SSB demod...

Hi Derek I have your audioSDR running with good SSB reception. I compare to the RSP1A. AM is not so good, odd 1kHz noise on top of signal. Now looking at signal strength and panadaptor next. Any code examples would be very helpful. My sw skills are basic, with good libraries to use, coding...

Now have some audio! not sure what fixed. Added SDR.init() and toggled SDR.setMute(false). Is getAGClookup(int); the correct function to read AGC level? Rob

Hi again! Have loaded the audioSDR code, pretty sure all the functions are setup correctly but no audio output, not even noise. I used BareBonesWSPR.ino as starting point. I'm happy hardware (teensy3.6 with audio PCB) is good as can load my SSB demod code and all fine. Need to debug. Are there...

Hi audiomath! I used the adafruit library for controlling Si5351, will see how this controls the PLL and dividers. Thanks, very useful info.

Hi A nicely presented audioSDR project, I'll begin implementing and try. I presume this is still using the weaver method? My current setup is the basic phasing type which is ok but needs more work to reduce unwanted noise and not happy with it's image-reject. I read softrock front-end is being...

I found this website and author very helpful.. https://zl2ctm.blogspot.com/2018/03/homebrew-ssb-sdr-rig.html?showComment=1556616799738#c5682027447334353041 I've used the very basic code from this site to demod SSB using teensy3.6 and it works fine. Rob

Hi I have a teensy3.6 working with.. https://www.buydisplay.com/download/manual/ER-TFT032-3.1_Datasheet.pdf and using the ili9341_t3 TFT library. It's very good but cannot find much details on how best to implement the TFT commands. For instance, when printing text and wanting to overwrite...

Hi Frank DD4WH I would like to make use of your AM_demod header. Is it a simple matter of adding the .h .cpp files for compiling and adding the audioconnection code with a switched output path for the AM-demod block? Hope you have time to reply, Rob

This link is very helpful... https://www.youtube.com/watch?v=bsVA_N6a9pY (Homebrew SDR Receiver Part 4 - Notes on Si5351, LCD, Rotary Encoder and Filter Design) Time to buy some Teensy hardware and start tinkering!

Hi DerekR The 74c74 does a clean job too and so cheap, but well thought out. What's 80m though? More interesting is your "SDR-in-a-block" comments. For people like myself who go as far as writing code using existing library's for various items like TFT's, encoders, i2c and so on, this could be...

Ah, thanks for the link. A lot of comments there. General opinion is that the device is good for SW receivers. It's true that the PLL's are slow to lock, so this should reflect when tuning, but I'm not reading evidence of this. Best way would be to buy one and try for myself. Cheers

Hi Frank I am assuming the Si5351 behaves similar to softrock Rx (Si570) which i have played with and found tune stepping to be somewhat clunky, time to settle. These are dual PLL's with up to 10ms settling. DDS will have very fast settling, good phase noise but yes there's some spurious but...

Hello! Have spent some time reading about this SDR project with the plan to build a shortwave radio. As an RF engineer, all is fine up to the iq feed into the ADC. I would use the AD9850 series DDS for the main LO, much faster and cleaner than the type suggested. When considering the SDR demod...