KD8CEC Amateur Radio

NeuroSDR user manual (3) — Sub VFO, satellite, digital voice, Smart Record, web remote Advanced workflows. The Sub VFO / multi-FT8 story assumes hardware with enough instantaneous bandwidth. Author: KD8CEC . 1. Sub VFOs on wide hardware (founding goal) A Sub VFO is an independent virtual receiver inside the RF capture window. On an RSP (or other wide source), you can: Listen to shortwave or CW on MAIN Run FT8 plugins on SUB1 / SUB2 / SUB3 at 14.074, 7.074, 7.040 MHz, … See decoded callsigns on the main waterfall when MAIN WF overlay is enabled If a Sub VFO leaves the capture, the UI shows OUT OF RANGE — raise sample rate / recenter, or accept that the decoder pauses. YouTube: RSP1 bandwidth + Sub VFOs + multi FT8 — full episode YouTube: Create Sub VFOs — 02:42 YouTube: Background FT8 while listening — 03:34 YouTube: OUT OF RANGE — 04:54 YouTube: 7.040 JA FT8 on Sub VFO — 11:38 Virtual Kiwi/WebSDR audio bandwidth is much narrower than a multi-MS/s RSP...

NeuroSDR user manual (2) — NeuroCaption and AF plugins Plugins attach to demodulated audio (or IQ) from your receiver. They are most powerful on local hardware with a stable sample stream; they also work on Virtual Kiwi/WebSDR when you use that secondary path. Author: KD8CEC . 1. Mental model SET → AF Plugins → add a row → choose type → assign VFO ( main or a Sub VFO) → APPLY. Each SCENE owns its plugin instance list. Decoder UIs appear as tabs on the right (FT8, CW, Caption, …). YouTube: AF plugins & captions intro — 03:36 2. NeuroCaption engines Engine Use when Notes ONNX / Sherpa Whisper (Tiny/Base/Small) Offline PC Download INT8 model files; Base/Small cost more CPU than Tiny Groq API Fast cloud STT API key in Caption SETUP Self-hosted Whisper Your GPU box Host/port in Caption SETUP YouTube: ONNX local — 04:07 YouTube: Translation (MyMemory) — 05:20 YouTube: Groq — 09:12 YouTube: Self-hosted Whisper — 12:16 YouTube: Tiny/Base/Small choi...

NeuroSDR user manual (1) — Main window and everyday RX Everyday operation with a local SDR (or a remote source if that is all you have). Author: KD8CEC . Main window — RX CONTROL, AF plugin tabs, RF spectrum/waterfall. YouTube: Device selection & display — 00:11 YouTube: Tuning shortcuts — 00:40 1. Choose SOURCE, then RX START In SOURCE , pick your hardware (SDRplay, RTL-SDR, HackRF, Airspy, …). Virtual Kiwi/WebSDR/OpenWebRX only if you are using the secondary Internet path. Press RX START . The button becomes RX STOP while running. Watch RF/AF meters and the status line for drops / underruns on hardware. 2. RX CONTROL Frequency digits — Click a digit, wheel to change that decade; or enter a frequency and commit. RF GAIN — Hardware gain where the source supports it. SET — NeuroSDR SETUP (Plugin / Audio / AF Plugins / IQ Plugins / General / RF / Performance). SCENE — SAVE / NEW / DEL named layouts (plugins + Sub VFOs + view travel with the scene). M...

NeuroSDR — Download and install for real SDR hardware This guide is for people who download a release and run NeuroSDR on Windows with a dongle or RSP. Author: KD8CEC . Repo install text (English + KO/JA/ZH): INSTALL.md . 1. Get the software Open GitHub Releases (not the green Code zip on the repo home page). Download the newest Windows x64 asset (example: NeuroSDR-v0.2-win-x64.zip ). Extract everything to a writable folder (e.g. C:\NeuroSDR ). Run NeuroSDR.exe . Old Zadig builds break RTL-SDR on modern Windows. Always use the latest Zadig when you need WinUSB. 2. What the zip already contains NeuroSDR.exe and supporting runtime files for that package Bundled native helpers for common USB SDRs (RTL-SDR, HackRF, Airspy, …) under paths such as native\ Built-in AF / IQ plugins You normally do not download extra librtlsdr DLLs for those sticks beyond the release folder. 3. Main hardware path (this is the product) Hardware SOURCE name (typical) What you inst...

NeuroSDR — What it is (hardware SDR first, AI where it helps) Hello. This is KD8CEC . NeuroSDR is a Windows software-defined radio receiver . The primary job is simple to state and hard to do well: take IQ from a real SDR, show a usable spectrum/waterfall, demodulate cleanly, and keep decoding plugins running while you still listen. I publish release zips so most people never compile anything: NeuroSDR Releases . NeuroSDR main window — local or discovered hardware appears under SOURCE; RX START runs the receiver. How to read this series: NeuroSDR is a hardware SDR application . SDRplay, RTL-SDR, HackRF, Airspy / Airspy HF+, SoapySDR devices, and rtl_tcp are the main path. Virtual WebSDR / KiwiSDR / OpenWebRX sources exist as a convenience when you have no dongle or want a public remote site — they are secondary , not the product definition. 1. Why I built it this way There are already good SDR programs. What I wanted on my desk was: Wide capture + many receivers at ...

C-Board firmware downloads are now available on GitHub. C-Board is the external DSP board I built for UV-K5 (and compatible radios) to extend digital features such as FT8 receive, APRS receive/decode, GPS-assisted functions, and related experiments. Hardware introduction (previous post): C-BOARD (DSP-Board) for UV-K5 Repository github.com/phdlee/cboard-uvk5 Release package: v0.32 What is in v0.32 cboard_v032.uf2 — C-Board firmware (RP2040) cec0.3P.packed.bin — companion UV-K5 / UV-5R Plus firmware cboard_v0.32.zip — packaged set + original notes Download v0.32 Why this is public now Earlier builds were shared only with beta testers. After that, many people asked for the firmware by email. I was not checking that mailbox regularly, so I could not send copies to everyone who asked. Publishing the last beta package on GitHub R...

The CEC UV-K5 firmware source is now available on GitHub. When this project began, the plan was simple: ship binaries while the firmware was still moving quickly, then open the full tree at version 1.0. That milestone never quite arrived on schedule ??so rather than keep waiting for a ?쐏erfect??release, I am opening the source now. A short note on the delay School lectures and other projects kept me busy for a long time. I also had many earlier projects still in progress ??including other open-source work ??so picking this firmware tree back up was not easy. With recent AI tooling available, I finally used that help to organize and upload the complete source. Repository github.com/phdlee/uvk5cec Mainline CEC_0.3V 쨌 HF / SI4732 tree in hf-si4732/ 쨌 Releases 쨌 Issue tracker Source repository on GitHub What you will find Mainline CEC firmware source ( CEC_0.3...

  C-BOARD for UV-K5 I created an externally mountable DSP-Board to process digital signals from UV-K5. DSP-Board was named C-Board. C-Board is divided into versions ranging from the simplest version to one that can be equipped with GPS.

Introducing UV-K5 Version 0.3Q (Stable version,  added FT8 QSO) Version 0.3Q is mostly the same as version 0.3C. If you are already using 0.3C and do not plan to run FT8, no update is required. Since 0.3C was tested by several beta testers and there were no major problems, we only changed the name to the stable version 0.3Q.

▶ Watch the HF 0.5 fullband walkthrough on YouTube → Subscribe to the KD8CEC YouTube channel for more UV-K5 HF videos. Related: UV-K5 · si4732 · HF full band  Introduction to UV-K5 HF 0.5 (Fullband receive version) This is an introduction to UV-K5 HF full-band reception firmware 0.4HF using SI4732-A10. This version is released separately from the existing UV-K5 CEC firmware version. because space is needed to store a large PATCH file to use SI4732-A10's SSB. This article only describes the features newly added in Version 0.5. Please check the links below for full features. How to modify your hardware http://www.hamskey.com/2024/02/uv-k5s-hf-full-band-reception-lsb-usb.html Version 0.3HF (Most feature descriptions are provided) http://www.hamskey.com/2024/02/introduction-to-uv-k5-hf-fullband.html Version 0.41HF (Description of Band plan function and Dual RX function) http://www.hamskey.com/2024/03/introduction-to-uv-k5-hf-fullband.html

 Introducing UV-K5 Version 0.3C (Added WSPR , APRS TX with PC ) Version 0.3C includes tasks associated with computers. You can use the same cable you used to update the firmware. If you just want to receive APRS you will need some modifications. This modification can also be used for FT8 communication that will be supported in the future.

  Introduction to UV-K5 HF Fullband receive Version 0.41 (Changed from 0.40) This is an introduction to UV-K5 HF full-band reception firmware 0.4HF using SI4732-A10. This version is released separately from the existing UV-K5 CEC firmware version. because space is needed to store a large PATCH file to use SI4732-A10's SSB. 0.4HF added several functions to use SSB for shortwave radio and amateur radio.

 Introducing UV-K5 Version 0.2V (Spectrum & Waterfall added) The goal of this version was to secure memory to create Version 0.3 Deleted the existing FM radio program and created a lighter, more independent FM radio program. And added a simple spectrum function.

Introduction to UV-K5 HF Fullband receive Version 0.3 This is an introduction to UV-K5 HF full-band reception firmware 0.3HF using SI4732-A10. This version is released separately from the existing UV-K5 CEC firmware version. because space is needed to store a large PATCH file to use SI4732-A10's SSB. 0.3HF added several functions to use SSB for shortwave radio and amateur radio.

 Introducing UV-K5 Version 0.2P (APRS added)  (stable version) This version is a stable version with various features added to APRS test version 0.2B.  Please refer to the Version 0.2B(C) post for frequency settings and MySSID settings used in APRS. http://www.hamskey.com/2024/02/introducing-uv-k5-version-02b-aprs.html

UV-K5’s HF full-band reception (LSB, USB) circuit (confirmed version) After releasing the full band reception firmware of UV-K5 using SI4732-A10, various experiments were conducted. This post shows the experiment results and the final circuit diagram.

 Introducing UV-K5 Version 0.2C (APRS) This version is a test version. If there are no major problems, the version number will be changed to 0.2P and released again in one week. If you want a stable version, please download it after one week.

 About UV-K5 CEC Firmware Version 0.1X (from v0.1p) 1.About Version 0.1X This version is the stable version of UV-K5 Version 0.1P In Version 0.1P, many things were changed, including the internal variable structure, and we received feedback for about 8 days to check if there were any problems. The original plan was to just change the name from Version 0.1P to Version 0.1X, but several features were added as follows. Please read Version 0.1P for main features 2.SSB Filter (bandwidth)   The filter can select one of these : VFO, 3K, 2K, 1.7K, 3K+, 2K+,1.7K+     This filter operates only in SSB mode and is disabled in existing FM mode.  If you select a filter with +, the + mode is also applied to CW mode   VFO : Previous firmware state. It is selected among WIDE/NARROW selected in VFO  3K ~ 1.7K : When actually measured, it is a little wider than stated. 3K+ ~ 1.7K+ : It improves the functionality of the existing filter. ...

 Modification of SI4732-A10 for full HF band reception on UV-K5 I will guide you on applying SI4732-A10, which is mainly used in shortwave radios that support SSB, to UV-K5.   Firmware Version CEC_0.1HF

▶ See the UV-K5 CW keyer in action on YouTube → Full CW keying series (paddle, memory keyer, setup) on the KD8CEC YouTube channel . Related: UV-K5 · CW   Introducing UV-K5 Version 0.1P (CW Mode) CW-related functions have been added to version 0.1P. The spectrum function has been removed but is maintained in the source code. Later, when the source code is distributed, you can activate it and use it if necessary. This version is for testing purposes only. It will be redistributed as the stable version 0.2 in approximately 1-2 weeks. If you don't want to beta test, you can wait a week or two and download 0.2

 Introducing UV-K5 Version 0.1M (SSTV, Text Configuration) In version 0.1M, items related to text settings and SSTV transmission function were added. As previously announced, only compiled binaries will be released from 0.1M until 1.0 is released.When the version is upgraded to 1.0, we will organize the source code and release it together. It probably won't take long.

Two features were added in V0.1c From the next version, versions with experimental elements will be published. The source code for this version has been released together. Versions 0.3 to 0.9 are in the development stage, and I will release the source code together with version 1.0

UV-K5 firmware development begins And Release 0.1b  I had a vacation last week. I was allowed about three months. The past few weeks have been a variety of experiments to develop the firmware. I start my work based on egzummer's firmware, which is the one most people use.

 Release DVPI Version 1.03 There have been some changes to the DMR node recently. This version changes only those related to the recently changed DMR node. If you normally use Version 1.0 or Version 0.95, no upgrade is required. DVPi uses the USRP Client protocol.  When you install and use DVSwitch, you must read and comply with the license that appears. The user is responsible for the license for the use of DVPi.