[UK-CONTEST] RX Coax Loops

[G3SJJ]

I've been messing around with a coax loop from 80m based on the 160m 
loop that Bob GU4YOX is using but am not happy with it.

I have used 11ft of LDF2-50 in 3.5ft diameter circular loop. I started 
off with a 400pF variable C to tune it but could detect no difference 
throughout the span of the capacitor. I have added a 200pF fixed C but 
still no peak.

Any thoughts?

Chris G3SJJ