The Open Source OVI-40 SDR Transceiver
Thanks to various contributors for letting us know about the OVI-40, a new open source DIY SDR ham radio transceiver project that is now available for ordering. The OVI-40 appears to be a German project that is based on the mcHF transceiver. It is a standalone SDR transceiver (no PC required) with a frequency range of DC – 75 MHz. Most discussion appears to be happening in German on their forums, so it is a little difficult to get English information about it.
The kit has recently been released for preorder. transceiver is a kit involving SMD soldering, but can be ordered fully soldered for 202 Euros (~$240 US) + taxes. The LCD screen is an additional 24 – 27 Euros. The kit without soldering done costs 112 Euros (~$132 US) + taxes.
The advertised details and specs are listed below:
OVI40-SDR is a transceiver which covers VLF…75MHz. It is mainly a DIY project – but all PCBs will also be available as soldered, aligned / programmed PCBs for all those, who do not have the skill to build a complex SMD project by themself or do not want it. OVI40-SDR will also be available as “only RX” and can be expanded with TX stages later.
Developer team takes inspirations from all existing commercial and DIY projects to get a SDR which combines possibly the best of all of them. But OVI40-SDR is not only a TRX – it is a philosophy. A community based working together, regardless of different countries, languages, religions, political systems – all are working together to get a very nice transceiver for themselfes and for others who are coming to the project later – wants to show, what people can reach if they are working together and do not struggle against each other. HAM radio always has connected the world – using the possibilities of the internet adds much more power for community working.
- RX from VLF (~ a few KHz) … 4m, possibly 2m Including
- TX 160m … 4m: 50W, 2200m, 630m and 4m (2m if Implemented): 10 … 20mW SMA Out
- continuosly tuned preselection
- PA works using double LDMOSFET, independent BIAS adjusted. BIAS is internally Measured via A / D and can be set in menu Directly in [mA].
- TX and RX mixer with very low capacity to minimize LO leakage
- true RX QSD mixer using instrumental amplifiers
- all internal Voltages (8V, 5V) are generated using well-shielded switching regulators. Additionally switching frequency is shifted via firmware so that never harmonics are present in the RX spectrum
- included hardware for measuring antenna (sweep) using logarithmic amplifier
- output of an independent selectable rf to SMA plug. I am experimenting to use this as a beacon WSPR Which can run parallel to radio
- usage as possible network analyzer