This appears to be a case of RFI.? Most likely coming from current traveling on the outside of your coax feedline back to the IC7000 which is causing the shutdown.? The amount of "common mode" current will vary by band and this is why it occurs on 40 m but not 20 m.? ?My first step would be to install a common mode choke at the base of the antenna.? Connect the output of the choke to the antenna and your feedline to the?input.? ? Changing the length of the feedline might help as well, but this would likely move the problem from one band to another.
Balun Designs manufactures?these devices.? ?My experience is that they make good products.? Here's a link:??
On Mon, Feb 5, 2024 at 6:57?AM Michael Parker <miketparker@...> wrote:
Anyone had this issue.? Powered by a LiPo battery and using a 1/4 vertical with a wolf river coil with an swr less than 1.5.? When transmitting CW at 100 W, the unit will shut down.? If I turn down the power to 25 W this won't happen.? Doesnt happen on 20m. Any ideas?
