/diy/ - Do It Yourself

>>1336407
>Shit, couldn't I go with 300kHz or something instead? I'd like to not cut out half of the SW bands and all of AM radio if possible, and hearing up to 26MHz would also be a small bonus. I hear the mini whip is particularly good at avoiding low-frequency noise

You can go with whatever you want mate. If you want to get something more-or-less decent and have higher chances of receiving DX stations you have to eliminate as much noise as possible. You see most of the man-made noise / atmospheric noise gravitates towards low frequency. Allowing all that shit into the up converter places very high demand on IMD, BDR and IP3 performance for both the up converter and the receiver. Otherwise DX stations will be masked and drown in noise.

>>1336407
>I hear the mini whip is particularly good at avoiding low-frequency noise.
It works fine in quiet rural installations, if mounted high enough and with good ground plane under it.
If you try to use miniwhip in noisy city environment you are likely fucked. Like proper fucked.

You should go with active loop antenna instead as it's naturally not susceptible to
E-field noise pick up in near field.
https://en.wikipedia.org/wiki/Near_and_far_field
https://en.wikipedia.org/wiki/Loop_antenna
10-20M random wire + 1:9 unun would be good as well.