4 ms·
Sure, just do the Zeta SDR schematic in reverse, but like others have said you'd have to figure out the rest of the chain as well as a ton of filtering. I've tr
by th0ma5 2y ago
Sure, just do the Zeta SDR schematic in reverse, but like others have said you'd have to figure out the rest of the chain as well as a ton of filtering. I've transmitted with direct digital synth chips as well as rpitx which is literally bit-banging RF off of a pin on a raspberry pi with NTP sync even. Again, still had to do a lot of filtering, but with wsprrypi I was able to be heard one time in New Zealand from Ohio, USA without any amplification.
- mschuster91 2y ago> Again, still had to do a lot of filtering, but with wsprrypi I was able to be heard one time in New Zealand from Ohio, USA without any amplification. Hope you got a QSL card out of that kind of DX effort. What antenna did you use?
- boxerbomb 2y agoI would imagine he was talking about running WSPR.
- th0ma5 2y agoYes WSPR ... The acknowledgement of contact was online. I had an MFJ antenna tuner but it was just a long strand of wire lying over the roof maybe 14 gauge? Slim. Something like 100mw output power? 200mw Maybe? It ran for a couple years unattended and was regularly heard east of the Mississippi and sometimes with some regularity in Europe.