It has been just over nine months since I made a post on my blog or provided any updates on the "Irwell HF Multimode Transceiver" project that I have been designing and developing for what feels like an eternity.
In my last blog post, I provided details of the multimode modulator I built for the "Irwell" transceiver. This tested out okay, but I was unable to carry out any on-air testing, as I had yet to design and build the required transmitter amplifier stages needed to get the transceiver on the air. Fast forward nine months later, and I am somewhat embarrassed to admit that I still haven't designed the transmitter amplifier stages!
In my defence I can substantiate and justify what, on the surface, may appear to be a lack of progress or abandonment on my part, so here goes:
I have been busy working on a modular homebrew SDR transceiver project based on the Red Pitaya (AKA Stemlab) FPGA microcontroller board, and I wanted to get this project working, and to the point it also required transmit amplification, the idea being I would design a transmitter amplifier module that can be used with this project and the "Irwell HF Multimode Transceiver".
I found it neccessary to improve my software programming skills in order that I could expand and improve the Irwell VFO software and also produce software for a controller board I designed for the SDR transceiver. This has been a HUGE time sync but worth the investment of time!
So there you have it this is where I am upto, the "Irwell HF Multimode Transceiver" has been updated with some significant software changes and I now have two transceiver projects near to completion with both requiring some transmit RF amplification.
Next I want to start documenting my Red Pitaya homebrew SDR transceiver build and once I have done that I will do a post on the "Irwell" software development changes that I have made, but for now here is a quick screen grab that shows the new software in operation.
The new software contains dedicated band tables, and as you can see from the image above the transceiver has ventured into the Darkside by introducing channelized CB Radio bands. The new software also includes dedicated bandtables for the Shortwave bands, HF air aviation and HF Marine bands, and of course, Amatuer radio. The Bands and CB channels are scrolled through using an additional mechanical rotary encoder.
Thats it for this short blog post, until next time...
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