Can someone please look at this diagram. I see where the two points are solder for the coil, but how is the cable from transmitter attached to the bottom of the copper pole? I dont see a soldering dot on the digram like the coil points are shown.Thanks much.
The bottom of the coil form is supported by a short section of metal tubing. The tubing is clamped to the wood base with insulating clamps.
The center conductor of the coax will connect to the bottom of the short section of metal tubing supporting the coil form. Not extremly critical but close to the bottom. Unless the tubing is copper I wouldn't use solder, rather a thru-bolt to attach the conductor. The coax shield will connect to the ground rod.
Ideally you want these two connection points within an inch or so of each other so as not to expose to much of the conductors. You should weather proof the end of the coax so water does not wick back into the coax. Some use schelac, silicone or special insulating dope. I wouldn't use simple electrical tape. Some recommend heat shrink tubing but if the exposed conductors are in the weather, water WILL wick into the cable.
If you want to get fancy, attach a female coax connector between the bottom of the support tube and ground rod. Secure it in some way to hold it in place. Then, use a male coax connector on the end of the coax. You could even put it in a small water-proof box to protect it from the weather.
Thanks Mram...good stuff!