On Thu, 12 Jun 2008 09:03:36 +0100, Ian Jackson
wrote:

I thought that there were some stand-alone RF clippers. Surely there is
no reason why they cannot be external units, inserted in-line between
the mic and the mic socket (ie audio in - audio out)?

At least Datong made a stand-alone unit. There was an article about
RF-clipping and the Datong unit in Wireless World a few decades ago.

Paul OH3LWR