That day was a 31" whip on the trunk of the car (fed to a Pioneer AM/FM/SW car radio). I think you want something better than that...
Picked VoK up yesterday (Mon, Sep 3), 1300-1357 GMT, and they started out well on 11710 and 9435 kHz. Around 1330, 11710 started fading out. Near the end, 11710 was still in there, but noisy. 9435 was a bit better but not great.
On that Monday, I used a Kenwood TS-690S with a Wellbrook ALA-1530S+. That loop works quite well (especially down on LW & MW). On HF it works fine. I also have a G5RV over the house, but that thing picks up a bunch of RFI.
Other times, I tune in with an SDR that has a Bonito Boni-Whip connected. That thing works well for its size, but care must be taken to get it far away from RFI sources and it needs a ground near it.