Rockwell Collins HF 8040 Coil Module This is a tank coil module that was removed from a functioning Rockwell Collins HF 8020 amplifier. The unit was parted for components... Check pictures for more details.I Check out my other listings of Ham Radio parts,equipment & Industrial. Most items are surplus from Canadian Military -Mil Spec. Check out my other listings of Ham Radio parts,equipment & Industrial. Most items are surplus from Canadian Military -Mil Spec.