Common mode choke Recently I assembled a Common mode choke from HFkits to use with my vertical antenna that, due to space restrictions, do not have radials as counterpoise. This common mode choke should cover the HF band from 3MHz to 30MHz. A common mode choke should prevent the outer conductor from radiate. And it may prevent noise picked up from the outer conductor to reach the radio. This is how the kit after I opened the package.

I got my amateur radio license in 2017. My call sign is LB8NH. If you have not have contact with me it is because I have not been a very active amateur. In 2018 I bought a Kenwood TS820 on a junk auction. The transceiver worked when I fist tested it but after a few days it started to go inn and out. For a long time it was just collecting dust on my bench as I was to busy with other things.