HamPi Radio
High performance 16 Band self-build Amateur Radio for the Home Constructor
High performance 16 Band self-build Amateur Radio for the Home Constructor
Home
This Website is under re-construction...
Build your own LF / HF / VHF Transceiver
Latest news:
Godaddy (I have 'interesting' things to say about them!) deleted the www.hampiradio.com website in error. Decision: Get away from them asap. Therefore this site is going through a major re-construction.
The Radio. HamPiRadio is going really well, and a local friend / radio ham / radio engineer Keith has been helping for over a year now.
The CPU, Keypad, Front panel assembly and Band Pass Filter boards are performing very well and are ready for other to build.
The Radio Board has gone through a number of improvements and it about to be put to PCB in the next few weeks. One change is a decision to have the SSB and CW Crystal filters on a small plug-in sub board (42 x 38mm). It will be supplied built and tested. The reason is that to get these filters working well needs care and a spectrum analyser is needed. 'Playing around' on the main board can easily lead to lifting tracks, so it is much better to build and test off-board. The other big change is there will also be a small plug-in sub board for the Noise Blanker. This is a much improved and redesigned approach to catch those nasty crashes, woodpeckers and here in NZ my electric fence for the cattle.
The PA Board is all working, and will come into focus again when the Radio Board is done. We are focussing on getting the upper frequencies and low pass filtering improved for working on 8, 6 and 4mtr bands (Yes that's right, 8mtrs is now part of the project).
If you are keen, knowledgeable, and available we are also keen to hear from you. Areas that could do with assistance in speeding the project up are:
The case, so sheet metalwork design experience. The case is out of date and needs checking over and reproducing. Ideas and inspiration could make the case look more sexy!
3-D printing. The small front panel Bezel that goes around the TFT display. JLC 3D doesn't like the design file.
Firmware testing and improvements. The firmware is written in C++ and the processor a Pi Pico 2 RP2350. There are about 3500 lines of code currently, and is working really well. The areas that could benefit from assistance are. a) CW Decoder (Direct audio into an ADC input). The basics are there bit it is not decoding at all well. This can easily be an isolated project just for CW Decode. A b) Tuning resolution and auto acceleration needs improvement. c) other minor things...
This website!
Interested? See the contact page.
The HamPi Radio Project
The HamPi16 is a 16 band LF/HF/VHF Amateur Radio project for the home constructor. The HamPi receiver operates on all bands from 160kHz to 144MHz (CW & SSB) and transmits on HF bands 160m to 10m with 100 watts output power, and also transmits on 8, 6 and 4m bands. On receive it also operates on the two LF bands 160 & 475 kHz and VHF 144MHz. For the future the LF bands and 144 VHF bands TX RF Amplifiers and switching can be developed in a separate housing(s). The emphasis on the initial project has been quality basics of the receiver and transmitter. This is a project you are encouraged to get involved with for ongoing developments and improvement.
Multiple filtering is included: Noise Blanker, SSB & CW Crystal filtering, four stage Audio filtering (SSB & CW) and a sharp Notch filter.
The concept demanded that this transceiver be easy to use, with the important functions on the front panel. When working that sought after and rare DX it is frustrating to have to press buttons and wade through menus to find the right filter, or RIT, or notch filter, or adjust the gain of the various receiver stages to reduce QRM. The HamPiRadio has the needed controls in the form of a real knob, or a single press keypad button. The photos here will say more than words… A full list of features features can be seen on the Features page.
See the Test Results page for comprehensive technical comparisons of the HamPi and other transceivers.