Alexander KnochelIf you tune in to our Grafana Live dashboard now, you are just in time to observe live when the balloon reaches the Regener Pfotzer maximum!
Dabbling on the Dark Side of the Force a bit...
It still seems like magic to me that these things work at all, given that all that stuff boils down to a well chosen matrix multiplication with learned weights, and some normalizations in-between.
#ai
#physicsedu
#stem
The Students in the Antenna and Filter group have finished the vertical with four radials for our experiment, and it measures quite beautifully at 7 MHz!
37 Ohms like a textbook groundplane
Our Balloon is airborne!
Find it here:
https://amateur.sondehub.org/#!mt=Mapnik&mz=9&qm=12h&mc=49.54571,8.68744&f=Spaceship
or QRG 434.7 USB (Horus)
or on our LORA Dashboard
My students designed, simulated and built this #hamradio PA, isn't it pretty?
It is a Class-E nonlinear design and is supposed to output >100 W at 7 MHz.
***
On July 8 between 6-11pm CEST
***
depending on.how.fast we are setting up everything,
we will go on the air @DL0WH with a transmitter entirely made by students without fixed schematics, entirely from scratch
primarily on CW, and we want to see how far we can go.
If any of you would like to listen in and send a report, or respond, we would love to send you special QSL Cards.
Reports to:
One thing becomes evident in those ADEV measurements, once I approach few x10^-12 stability, *everything* starts to matter. Cooling fan of the lab supply starts, stability goes down the drain, I touch a cable, the same, slight temperature change, forget it.
First it appears I need proper supply voltage beyond a simple switching lab supply, and serious filtering with that.
Going stratospheric again #physicsedu #hamradio
This time, my students want to measure the altitude dependence of radiation
This time, my students want to measure the altitude dependence of radiation
Tobi Weh
First tests of ZWO Seestar S50 under average conditions (not very dark skies), about 29min exposure
#astronomy
#physicsedu
#astronomy
#physicsedu
