I've built that magnetic loop yesterday according to Kr1sts' schematic.
I'm impressed! I was really wondering how it would work against the
An-1, and sofar it seems to work at least equal as good, and then you
have to add in the benefits of it being directional. Naturally, having
to 'tune in' all the time makes it a bit less practical.

I also got it to start tuning from about 4400KHz (hurray).

I found a cheap ~ 15$ building package for an antenna amplifier
(unfortunally 10-140MHz, not covering my fav. the 60 meter) which might
be a good experiment to further boost the performance of this hobby
project.

If anyone knows of idiotproof schematics (I have about zero knowledge
of building electronics) that would also include the 60 meter band,
that would be awesome.