(1) use a 1:1 transformer to convert the balanced output into unbalanced line for the ham gear.
(2) measure the V-RMS out of the Aphex and remember that "mike input" is generally 60 dB down. if you're putting out hot signal, you should build an H -pad between the Aphex and the transformer.http://www.nu9n.com/tpad-calculator.html
(3) shielding, bonding, etc. it's not just a good idea, it's the law.
(4) font makes it hard to tell, but am I reading the spec sheet online correctly that this is a line level device with maximum levels in and out +25 dBm? I thought I remembered Aphex from the 70s as studio processing equipment. that would drive a class A phone line to a broadcast transmitter directly. http://www.aphex.com/aphex-products/973/
I read this as a machine meant to go in a NEMO or buss in/out patch, not mike level without amplification.