Update: My #WSPR transmitter v1 looks great! PCBs from JLCPCB arrived some days ago and I soldered the first kit. Works well but some changes will be made to v2 of the PCB. Upcoming: measuring and testing.
Do you think we've had enough closed, irreproducible, proprietary digital modes contaminating the #hamradio hobby (#ROS, #VARA, #DMR, #YSF, #DSTAR, etc.)? Well, now we've got #LORA for #APRS.
No: ham radio should be based on open, free standards. There are plenty of free, open, well documented digital modes (#FT8, #JS9, #WSPR, #M17, #PSK, #Olivia, #RTTY) in addition to the oldest-ever digital mode (#CW). Please support ways of operation everyone can inspect, modify, or build a radio around.
And we are having another go at overnight operations of our student built #wspr#hamradio beacon callsign DL0WH - this time with an improvised antenna tuner adjusted for maximum field strength in the near field using #tinySA. First few transmission cycles are already looking pretty good. #electronics#physics#education
For all #WSPR operators in the Midwest, keep an ear out for DL0WH on 40m. @quantensalat is a physics teacher who built a WSPR station with his class. It would be so awesome for the kids to hear reception reports from real live people.
Tune to 40m overnight, and let’s see if we can give them reports!
After some modification to the amplifier, the oscillation has been suppressed enough. The dipole had to be shortened 15% or so due to the proximity to ground and buildings but no matter, the system works.
We got immediate spots in Great Britain on our first transmission cycle - in broad daylight @ 40m using our club call sign.
The dipole has a metal facade directly to the east, which might explain the directionality of the spots #physics
#WSPR Student project update: Today we let the student built beacon operate through the night for the first time using our club call sign, and it is fascinating to see places open up during dusk.
Yet, since our dipole mainly shoots west, eastern europe and russia only came on the map slowly while La Palma appeared relatively early
The second night of #WSPR#hamradio yielded much the same picture with one very notable exception: we managed to be heard in Costa Rica #electronics #education