So ...still beyond my reach ..but with a 1.8m surely doable..
Took an inverto black ultra and removed the cap ..
Then inserted a long tapered dielectric plate from a scrapped eagle aspen ..
The Aspen onlty covered a small range in the 12 ghz region (DirectTV)
Rotated the inverto through 45 deg ..
This would theoretically reduce any linear reception close to null ..but have no effect on circular ..
Then scanned using universal range in H ..which translates to L ..
12149L is now being received at around 4.1db variable ..
Close but no cigar ..
here is the scan..
Anyone managed this on a 1.5m in the UK yet ??
rgds
VS