Anyone interested in some pictures of the installation (and mods) of
the Inrad roofing filter and spectragram plots of the audio output
spectrum with and without filters can see these at my wed site:
http://tom.w4bqf.googlepages.com/roofingfilterforomni6plus
Tom - W4BQF
"I couldn't repair your brakes, so I made your horn louder."