It looks like you're new here. If you want to get involved, click one of these buttons!
LOGI Projects Discussion
User Projects Discussion
In this Discussion
3 Day Review
edited January 29
I have had my system on the air since Thursday evening. I had a BO with Seeed and got one of the latest batch. Here are a few observations and thoughts.
FedEx was pretty quick with delivery from China, < week.
Assembly of the kit was easy other than the tedious fumbling with the nylon standoffs with their metric thread
System booted up and ran flawlessly, first try. I used a 4A supply from an Odroid I had.
Being close to several AM BC stations, I have a HPF on the feed to stop OV. I'll replace it with notch filters soon.
I put a 50 ohm load on the antenna and things looked clean, my interference comes in through the antenna I am guessing. Likely some 60 Hz hum via a conducted path, TBD
I put the unit in a partial Faraday cage, not sure if it helps. (see pix below)
will be adding more ferrite and a different PS this week
More testing for interference....
added Type-43 ferrites on all cables.
terminated antenna input in 50 ohm, things look very clean on spectrum analyzer display and with a narrow waterfall
I must have lucked out, as a I see no evidence that 5V switcher is causing an issue
I do see some 60 Hz spurs down near the 80M WSPR freq. but they are only there when an antenna is attached. Need to work on source of those, will DF with my ICF7600
Powered by Vanilla