• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Defunct Web Sites

That's cool the info is being cared about, but is there any reason archive.org doesn't have that? I think a much more effective way is to donate to them, vs. hoping random (though motivated and well intentioned) individuals archive data. They are a legit non-profit company dedicated to the preservation of media and internet sites.
 
Wayback machine is very slow and not very convenient to use.

PS. I have a copy of electra-print.com web site (offline for a while), but so far have been unable to get permission from the Jack Eliano to upload a copy (may be he was in bad mood). If someone know him personally it would be nice to convince Mr Eliano to grant a permission.