Bimetallic Junction to Minimize Electrolysis, But Allow Conductivity

The best way is to solder the wire into a standard "copper lug" and bolting it to the antennae. A proper solder creates an alloy that is compatible with aluminum and copper.

If you shop around you can find some that are aluminum coated

The most important thing to do is to clean both surfaces within a few minutes of connection to prevent oxidation. Once connected, you want to use a specialty tape that will get a water tight seal. It is expensive but well worth it.

for example See

http://www.tessco.com/products/displayProducts.do?groupId=436&subgroupId=65

Hi Wolfie,

get rid of the copper conductor it is waste of money! Aluminum has 60% the conductivity of copper, so you will not have problems if you connect your generator to aluminum cabling (beware of impedance and location of matchboxes).

If you like to stay with copper you will pay much more but it is feasible: terminate it with stainless steel and bolt this to the aluminum frame. Do not use any solder or brazing as this will give rise to serious corrosion if humid or wet and or subject to stray currents and distributed rectifying of your RF energy.

Have success

RHABE