[R-390] Line Regulators

[Richard]

Our line voltage runs up at about 123.  I use a variac and a topaz
isolation transformer for the R390A.

I got a Marlin P. Jones (www.mpja.com) catalog in the mail today that
had a handful of line regulators.  The ATVR2000 is 2KVA with 110V/4%
output with input from 80-140 for $50.00 with meter. Looks kind of nice,
but I did a google search and can't tell if it is isolated or not.
Seems at 16 pounds shipping it might be.  Anyone know for sure?  

73 de Richard W5SRB.