Today, wx was pretty warm so I tested my special portable antenna.
This time special was loading coil which is placed top of the 4m-long fishing-rod.
The loading coil is made by aluminium code about 7m long. The point of my idea is its shape. I wound aluminium code in three parts in different diameter so that they can be fold up very compact. Yes! It is retractable coil. As this idea comes from Japanese lantern "Cho-Chin"[提灯], I named this coil "Cho-chin-Coil".
I'm planning to get pattent for this superior idea. (^^v
Today I worked with JA5 station that is about 600km away on 40m band by 3W output of KX1.