A few days ago we received a production sample of the new ThumbNet N3 receiver. Our sample came with the works, which includes the green aluminum enclosure and shielding can soldered on over the PCB. This full set costs $33.50 USD + $4.50 USD international shipping, but there are cheaper options if you do not want the aluminum case or the RFI shield.
We’ve only had a brief time to play around with it so far, but it’s performance seems very similar to the prototype unit that they sent us earlier. We intend to give the N3 a longer review next week but our first impressions are favorable. In this post we’ll simply unbox the unit, show some photos and give it a quick turn on test.
The N3 comes in a protective cardboard box with the N3 and Thumbnet/Nongles logo on it. Inside sits the ThumbNet N3 unit itself, and there is a power plug terminal block adapter located on the bottom of the box. Excluding the F-type connector, the ThumbNet unit has dimensions of 6.2 cm x 4 cm x 2.1 cm, and weighs 58g. The green enclosure is strong and rugged.
Unlike the prototype they sent, this unit can run direct from USB power alone. We saw that it draws about 400 mA of power, and we had no trouble running it from our 1A capable USB ports. Of course one of the main advantages to the N3 is the ability to power it with a low noise external power supply, and we will be testing that in the next review.
Nongles SDR Lego
ThumbNet have also announced their new sister site, Nongles.com. On this site they intend to soon begin selling something called “Nongles” which is a mashup of “NOt a dONGLE”. Nongles are an idea that can be best described as a type of “SDR Lego”, and we think will be very interesting to people interested in experimenting with different SDR set ups and for use in education. Nongles will be based on the RTL-SDR design, but they are going to be split the RTL-SDR up into several discrete PCB modules/blocks such as:
- R820T2 Module
- RTL2832U Module
- Experimenter Module
- External Clock Module
- Bias Tee
- Signal Amplifier
- 50 – 75 Ohm Transformer
- Filter blocks such as SAW/FM Bandstop/High Pass/Low Pass and other DIY kits
Obviously you’ll at least need the R820T2 and RTL2832U blocks to have a working system. Then the other blocks can then be added in as needed. The Nongles are not ready for sale yet so keep an eye on their website for news of their release.