The 500 kHz grabber is now set to two narrow frequency ranges, the "WSPR segment" and 100Hz around the frequency of DI2AM.
DI2AM reception seems to be there essentially all the time after sunset, albeit with some (expected) QSB, and WSPR signals coming and going.
Nice result with a "cheapo" frame antenna wound on a cardboard box 35x40 cm small.
A new somewhat bigger frame antenna (more than 70x70cm) will be made some time, but that will have to wait.
In the week end the construction of the 500 kHz TX should begin
"The Art of Electronics" #8 -- Why Not a Simple Emitter Follower as The AF Output Circuit? - Click on the image for an easier read *Back when Dean KK4DAS and I were trying to find a suitable AF amplifier circuit for our High School Direct Conversi...
4 hours ago