Hello LF'ers, Looking for ideas re automatically swapping two RX antennas over to one receiver timed to WSPR or other timed digital modes to compare performance, Anyone got any input please? Thanks.
Hi Chris, LF. A few months ago my friend Antonio-EA1CDV, Wrote an interesting article for "Radioaficionados" magazine of URE. He write a way to compare antennas using WSPR tools. I think it may be us
https://qrp-labs.com/ultimate3/u3info/antcomp.html Alberto El mié., 20 mar. 2019 a las 16:28, Alberto Martinez (<[email protected]>) escribió: Hi Chris, LF. A few months ago my friend Antonio-EA1CDV,
Hi....I compared two antennas ( vertical half wave and a magnetic loop) a few years ago by keying a flip/flop from the tx accessory output normally meant to switch a linear amp on. The flip/ flop swi
Hi Chris, Use a relay, switched by a FET which is switched by a RS232 line. Then you can toggle the state by using SpecLab, each 2 minutes automatically, even at 0x:55, ie.between the sequences, wher
Yes, SpecLab can do the job. I have compared a loop antenna with the Miniwhip using SpectrumLab and switching the antennas using a toggle switch, the PC was a laptop with mono audio input. The waterf
Hello Claudio, Don't forget, there are people active on frequencies higher than a soundcard can sample :-) They need an external receiver and so they usually have one channel only. BTW, the RedPitaya
Hello Claudio and all who have replied here and by e-mail. I am liking the Spectrum Labs idea, but SL is a daunting application, but I am sure using it in his simple manner can't be *THAT* hard :) I'
Hw about a crystal oscillator and CMOS divider. You may have to juggle with division ratio a bit depending on what chips and crystals are available. Then just manually reset it on the even minute
