I am looking for advice on getting the best reception for several different portable shortwave radios like the Grundig G-5 and Sangean ATS-803A. I am putting up a 100 foot 12 gauge insulated wire from a stationary post on the top of my house (25 foot high) out to a tree. I have used cable ties to wrap the wire to a 100 foot polypropylene rope. At the end of the run on the tree I have put a large door and gate spring on which I have attached a clothesline pully with a weight to the other end of the spring to a to keep it tight because of snow and wind. I was planning on using exterior RG 6 and wrapping the center solid wire around the stripped back end of the insulated wire (antenna wire) on the stationary post on the house, pulling back the shielded ground and ignoring it. I then run about 40 foot from the top of my roof into my basement where the radio is. One option I have is to use a 9:1 balun installed just before it goes into the house then using heavier coax ( LMR 400 I think) from outside the house into the radio. The other option is to use a antenna tuner. Not sure which is better for my application. I am not sure if I should use good heavy cable from the roof to the radio instead of the RG 6 either. I am also a little confused how I should protect this from lightning and grounding the antenna/radio. I have heard that it is bad to use too big of an antenna on a smaller portable and wondered if that should be addressed or corrected as well. If you can advise on any one item or all of this I would appreciate any advice that you can give me. Thanks very much. Stan