Ungrounding an Amp--Any Danger?

Yes, the story is that Keith Relf died from electrocution while playing his electric guitar at home. A common version has him playing it in the bathtub, but his family has said this is a myth and he was found dead in his basement recording studio. Supposedly his amp developed an electrical fault, and it's also said that he was probably standing on an exposed gasline pipe that had something to do with it. What's interesting about this to me (other than that I am a Yardbirds fan) is that I play electric guitar, and can vouch for the fact that the vast majority of vintage amps do not have 3-pronged plugs in the first place.

Nsgarch: High quality coaxial analog interconnects, if not prevalent, are indeed made, by van den Hul for instance (which I happen to own)...there are others...

Nsgarch: I own vdH The First Ultimate and The First Metal Screen coaxial IC's. Metal-free TFU uses a carbon fiber screen/return, which far from being especially immune to EMI/RFI, is actually not recommended for use in situations where hum is likely to be picked up, including connections to tube amps -- a drawback in an otherwise outstandingly high fidelity design that I can personally attest to. TFMS was introduced to help in just those applications, by virtue of (as the name implies) an additional metal-mesh screen layer. vdH also makes several other models employing coaxial construction for analog use, both all-metal and metal/carbon hybrids (The Bay, The Name, D-300, The Source, The Well, D-310, The Combination, and MC Silver are all coaxial designs intended for audioband signals). WireWorld is another company that makes coaxial analog IC's, using a variation where the inner and outer conductors are both tubular. (It might be worth adding that, although coaxial cables by definition have their screens connected at both ends, WireWorld still claims these models are audibly directional due to grain orientation.)