From Jeffrey, PH7GIS
The Gobox in use for the very first time. Completely stand alone, off the grid, using a generator as my power source. It needs, some little adjustments. but overall not that bad. I had nearly 40 QSO’s.
Why am I wheezing? Well it was 32 degrees Celsius, so it was very hot, and walking around, wasn’t helping either.
From Kevin, KB9RLW
My home brew USB interface for all ham radio digital modes. Unique in that it uses an Arduino micro controller for the VOX function. This makes it very flexible and tweakable. One thing I didn’t mention in the video. You want to set the playback volume of the interfaces sound card to maximum on your computer. Then use the drive level knob to adjust the audio drive to your rig. This gives the vox plenty of signal to work with.
I intended to include the Arduino source code here, however youtube wouldn’t allow some of the characters in the code!!! Very disappointed, but I understand why.
I put that info on my blogspot blog. You can get the schematic and source code here.
From Cliff, N4CCB
In this video, I talk about Working Split and show you how to do it on several radios.
There are about a dozen communications satellites orbiting the earth that were designed and built by teams of amateur enthusiasts. I’ll talk about what they are, how they got there, and how you can build simple equipment to listen to their transmissions.
Propagation was quite poor when this video was recorded, but for better or worse, the SDRplay is connected to an 85 foot vertically oriented triangular loop and is simultaneously receiving the AM BCB, 75 meters, and 40 meters. Toward the end of the video, the 3 virtual receivers are tuned to 3885, 1885, and 7290, the 3 AM calling frequencies on 75m, 160m, and 40m. Since Radio China International was sitting on 7285 the 40 meter receiver was tuned there at the end. The SDRplay was set to receive a 10 MHz swath of the spectrum for this video. The SDRplay does a beautiful job receiving the AM aircraft band, the VHF-UHF public service frequencies, the FM broadcast band (in stereo) and pretty much anything you can think of between 10 kHz and 2 GHz.
From Tracy, VE3TWM.
Here is a brief look at Sealed Lead Acid batteries as a practical choice for portable power applications.
From Mile, Z33T.
Turn your mobile phone into an All mode communications receiver from 0.1 to 2000 MHz !
This video shows “SDRplay” Software Defined Radio running with my Android mobile phone, receiving USB on 20m Band (14 MHz).
The software “SDR Touch” and SDRplay driver are downloaded from Google Play Store.
Some mobile phone USB ports simply do not have enough power for the SDRplay receiver (my phone usb port, did not provide enough power also), therefore, I sliced the USB OTG cable and added (soldered) additional connector for an external 5 volts power source, or 5V battery pack. In that way, the external battery is charging the mobile phone and powering the SDRplay-receiver at the same time.
From Cliff, N4CCB
This is a comprehensive intro to the PSK31 digital mode. It’s all of the major concepts and some demonstration crammed into a 30 minute class. I had to leave some things out but I believe a newcomer will find what they need to know to get in on the action. – Cliff
TX Factor – Episode 11
In this special edition, we follow the progress of a Devon School in their attempt to be one of the ten lucky UK schools to link up with Tim Peake aboard the International Space Station.