Similar to Will stainless steel bolts work with my copper antenna? however my concern here is with electrical properties.
With copper antennas I never gave it much thought... just solder the wire.
I am finishing a loop antenna using aluminum tube and it seems to be a little tricky. Easy enough is to use a steel or stainless steel stud for the feedline connection and crimp an appropriate terminal connector to the feedline wire. Feedline will be something like 10-12 gage THHN going to a nearby auto-tuner.
Am I forgetting something important?
Not much concerned with galvanic corrosion as this is going in an attic. But still avoiding direct copper-aluminum connection anyhow.
In case it matters, this is for HF and low VHF (80 meters - 6 meters) and power is expected to be limited to 100 watts.