HRS has had the pleasure of spending some quality time with the new Alinco DX-SR9 100 Watt hybrid SDR HF transceiver. The Alinco DX-SR9 became available around January for a list price of $799 and a street price of around $769. This makes the DX-Sr9 the cheapest available SDR capable transceiver on the market to date. The DX-SR9′s nearest hybrid competitor would probably be the Elecraft that runs from $899 for 10 watts to $1600 for 100 Watts. Both radios offer IQ outputs with a bandwidth of about at about 48 kHz. The DX-SR9 however, does not cover 6 meters, but does offer a FM mode. The SDR functionality is a probably integrated a little bit tighter to the radio than the KX3 and like the Kx3, DX-SR9 also has a computer interface jack. In the next few days HRS hopes to have a review up, so keep checking back.
As of today, HRS has decommissioned the old forum. We were just getting too many spammers. The new forum will allow us a better opportunity to help reduce some of the spam. Unfortunately, we were not able to move the user database or the old posts to the new forum. If you were a member of the old forum, you will need to sign up again. The old forum will be available for a little while longer, but we will eventually remove it. Let me encourage you to try to post your comments and questions in the forum. I have noticed that the comment sections of some of the articles are getting a little unwieldy. You will probably stand a better chance of getting an answer to your questions, if you post them in the forum.
Thanks for your patience!
Ready to take your RTL Dongle to the next level or learn more about how Software Defined Radio works? Try GNU Radio. GNU Radio opens up a whole new world of experiments you can do with SDR radio. GNU Radio also allows you learn more about how SDR radio works. Once you get your head around it, you can start building your own custom SDR radio applications. One of the show stoppers for a lot of people who would like to get involved with GNU radio is the requirement to install Linux on your PC. Then you have to download and build GNU Radio. This certainly can be daunting for those who are new to the Linux operating system. Well, you don’t really have to go through this anymore to experiment with GNU Radio thanks to Kali Linux.
Ham Radio Science occasionally get emails from our readers on suggestions for a good reasonably priced HF SDR radio that won’t break the bank. So, we spent a little time investigating what was available in the under $300 price range. Frankly, there is not much to be found with the exception of a few kits. The kits are great learning tools, but some of our readers may not prefer trying to build a kit that includes tiny sma parts. Also the kits and some of the less expensive SDR radios are still sound card based and we were really looking for a direct sampling receiver. The $249 Afedri SDR-Net HF SDR met our requirements and more. The Afedri Net-SDR allows for connection to your pc via an USB interface and what truly puts the Afedri SDR-Net in a class of its own is the ability to connect via TCP (Lan connection). After looking into the very positive comments on the internet regarding the Afedri SDR-Net, we thought it would be well worth investigating this amazing little budget HF SDR receiver. The Afedri SDR-Net is made by Alexander Trushkin 4Z5LV and is available in a case for $249 or as a board for $199 from Alexs’ website. We highly recommend the version with case, since the case is very well constructed. We contacted Alex and he sent us out a sample Afedri SDR-Net Vers. 2.3a to take a look at. We have been using the Afedri daily for HF monitoring for about a month and have been very impressed with what you get for the price.