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Showing posts from February, 2020

New Technology for 2020 ~ The Teensy 3.5 is back working (sort of)

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The Aftermath of a Small Fire and Explosion! February 29, 2020 ~ Teensy 3.5 Update.

I have run a further test...


I am now convinced that the issue I am seeing with residue Sideband when going to USB lies with the Hilbert Transforms and the Audio Codec Board. Here was the test: I used the Teensy 3.5 to supply the LO signal to the RADIG V.3 but used an external sound card with my Linux Mint 64 computer running Quisk to see if the problem still existed. It did not. 
So the LO and RADIG Board are not the problem. One expert suggested there was an imbalance to the I and Q. If that were the case it would show up in Quisk. It did not and so I believe there is not an imbalance. I should note that is one of the reasons for the multiturn pots on the output of the 74AC74. I set those pots to less than 50 Ohms to ground before I even applied any signal to the ADE-1's. I also measured that the same LO signal level was present at the two ADE-1 LO Ports (Pin 6). So Imbalance was not an issue. 

Late …

New Technology for 2020 ~ The Journey Continues

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A 64 Bit Linux Mint Machine for $100.February 25, 2020 ~ Washington, DC.
I was using WSPR this morning to do some testing and spotted a cluster of stations of where I thought our nation's capital was located (perhaps that is an ominous term and maybe should say is). Well Washington, DC to my surprise was not where I thought it was --it is more inland from the right coast than I imagined.
Then I discovered that you can zoom in using the WSPR map and many features suddenly came into view such as the National Mall and RFK stadium. But one really caught my eye. Boom we have an International Spy Museum. Wow; but it may not be long for existence as the emperor's (with a small e) vendetta with the "spooks" may be cause to close down such a facility.
Several years ago I saw the "traveling show" of this museum at the Regan Library. It was enlightening! 
One piece of spy stuff was really intriguing. Seems like one of our top diplomats in Europe ordered a pair of custom m…

New Technology for 2020 ~ Linux Mint

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Another OS to use with SDR Rigs.
Linux Mint


February 18,2020: 
Real Time Video Recording using the webcam and Linux Mint.
I have stated that 2020 will be the year of many technology implementations in our ham rigs. Already I can see where in just a month and a half into 2020, there are things far more important happening with our hobby than your emperor (with a very small e) and his latest antics.
Today I read something about some students in Norway (I think) who belonged to a school radio club. Seems like they were indeed fortunate to have for a club station a FLEX 6500 with the Maestro Console. 
Leave it to the youth -- they figured out how to hack the Windows embedded computer in the Maestro. Boom now they can do things with their station that even FLEX probably hadn't thought of doing. Then again that is how FLEX started.
Well today on a smaller scale (micro-scale is more like it) using my new Linux Mint Machine I was filming my attempts to make some FT-8 contacts all on the same mac…

New Technology for 2020 --A Hands ON SDR Kit

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A Hands On SDR Kit!
Hey guys I tripped over this SDR Kit and to me if you want to get your feet wet in SDR this may be your ticket to ride. BTW the cost of the shield (if I did the conversion correctly) is about $38 today not including any shipping or handling.

Watch the video but in a nutshell:
It is a kit that requires just a bit of minimum soldering on an Arduino Shield. Yes, it uses an Arduino Uno and it is a progressive kit that takes you from a basic receiver to a digital receiver that will copy FT-8 and WSPR. The final step adds the transmit capability.
It is not simply a boxed kit but is more of a tutorial course that starts with the fundamental's of SDR and progesses you through to a working transceiver. 
The Arduino Uno provides the frequency control for the on-board Si5351 located on the shield, thus it is a controller so you will need an external computer with SDR software. They have a link to the software that will drive this puppy. I suspect (although do not know specific…

New Technology for 2020 -- A New SDR Transceiver

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Out of Adversity Comes New Ideas!Then it occurred to me … a different mousetrap.February 13th, 2020 ~ Leading Edge SDR

This is a photo of a rig from the Radioberry SDR reflector where a ham is using his SDR to communicate with OSCAR - 100. Firstly the Radioberry board is quite advanced and it is a new favorite of the "extreme end" techie types of our hobby. 
Secondly many of the Radioberry boards are being run with a Raspberry Pi4 and here is another example of the rapid technology infusion into our rigs! Keep in mind it is only the second month and 45 days into  2020. 
My post of yesterday regarding conventional radios versus SDR seems to be in tune where the hobby and hardware are going. Today's board type SDR rigs are small, extremely powerful, feature rich and yet at a cost we can at least drool over. Just think an RPi4 with all of the bells and whistles is around the $60 to $70 range. The Radioberry board I think is around $300, so for less than $400 you can be talking…