Testing the CloudSDR transmit DUC at 983 MS/s with the Artix7 FPGA. Hope to have FMCW generator running soon 0-450 MHz. #radar #codar

Had a few hours left in the day to design a "terrestrial" Muon tracker with space rated solar cells from Ebay. Uses a Polycase enclosure with a clear top. I guess it could do WSPR or CW or something else. Now needs a 2 meter magnetic loop etched on a middle PCB? #radar #WSPR

Wonder how many Gigawatts this 50Ω cable will handle. 1.21 GW?

The design of the standalone WSPR beacon keeps evolving. Now has a dipole antenna for HF, and bigger solar capacity for more power. #WSPR #HAMR

Now how do I 3D print this drift radio buoy?

This Muon Beacon top board came out looking pretty good. Time to solder some solar panels, u-blox GPS and Iridium antennas

Got new PCBs & already changing things. Will remove the 2 ebay Tecstar solar cells to make room for GPS & Iridium antennas. Solar will be handled by external Voltaic Systems solar panel. Way more energy storage + output power. Might even support my FPGA chirp sounder #radar

New pictures next to the proposed solar panels. I guess I need a chirped WSPR 4FSK mode with 1PPS drive and do ionosphere sounding while I am at it. The increased power adds a lot of posibilities, but will require a step down charger. #autonomous #radar

Having fun designing "mini" 3 dBic quadrifilar helix antennas for Iridium , GPS, 137, 145, 435 MHz and will have them measured at Antenna Test Lab Co #radar #cubesats RFSPΔCΞ

The 435 MHz QFHA is probably the easiest to design. It is easy to print, not very big ,and the stray inductances and capacitances in the discrete component 90º hybrid are manageable. Ordering the boards today. #amsat #satellite #cubesat #radar #drone #autonomous

On the WSPR beacon front, the brackets came in and look good. Need to design a bracket for the Voltaic Systems 3.5W panel that will bolt to the bottom with varying solar angles. Also received 3x activated Iridium modems for development from a good friend. #WSPR #autonomous

Need to try this SQFHA Standoffs Quadrifilar Helix Antenna.

The final CloudSDR boards look great! It’s almost time to build the first batch. #SDR #radar #cubesats #drone #sigint

Wow, yesterday 19:20z, Long duration High Altitude balloon HIRFW-6 played Phoenix once again. Trying to verify everything, was only a single report. With it, we clearly hold the worlds record duration flight at 767 days! HABeducation aprs.fi #nearspace Mini-Circuits @siliconlabw

Finally had a chance to finish the #LPWAN version of the #MUON tracker. It uses an SX1262, u-blox EVA-M8Q, Microchip Makes ATSAMD21G M0+, 3.3V SW supply, 22dBm 850-930 MHz, TCXO, Arduino compatible and size of a quarter #TTN #LoRa #CHIRPED

LPDA for 800-1300 MHz for those longer distance IoT contacts. Covers US_915 EU_868 AS_923 and RU,IN,KR,AU bands #IoT #LoRa RFSPΔCΞ #CHIRPED #TTN

Making great progress on the RFSPACE AE4JY cubesat transponder in a chip. Using the STMicroelectronics STM32L4 . Happy New Year!

Made some ENIG / matte black pcbs to make sure all the holes aligned. #SDR #CloudSDR #RF

RadFxSat-2 Signals Detected, AMSAT Engineering Continues to Assess Status amsat.org/radfxsat-2-sig… #amsat #hamr

looking for a place to install the phased array for 420-450 MHz. The goal is to have a minimum of 64 antennas at 4x bigger than shown here. The array will be able to track satellites electronically. Shown here in 4x4 and 16x1 configuration. #cubesat #rf #radar #antennas