I finally ordered the PAR BCST-HPF filter from Universal Radio. I was immediately impressed with the build quality! Silver plated SO-239 connectors and the In/Out switch had a good quality feel to it.
It does what it's supposed to do and it does it very well. Enabling the filter kills the offending band/frequencies like a light switch. Initially I thought I blew out my S-Units meter, it dropped like a stone. My waterfall display dried up like a desert! It was gone! Another flick of the switch taking the filter out of duty and everything was back to normal. Very convenient, no need to disconnect cables and remove it every time.
I've purchased numerous filters over the years from Dale Parfitt...he never disapoints!