Another option would have been to plug the computer into an isolation transformer. These occasionally turn up on Ebay pretty cheap, intended to provide ground isolation to computers used for medical purposes. [/QB]
I am looking at one of these too
https://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=120244590618&_trksid=p3907.m32&_trkparms=tab%3DBidding
If I can get one for under $30 than I would give it a try too.
Between three different 2-line phones, a filter on the CATV cable and isolating the AC I better be able to hear a pin drop!!!
