Can anyone tell me what size wire and dimensions to use for a 300 nH coil? I don't have an inductance calculator. I am having a problem with a 3cpx5000 that has high C Out. The tune vacuum cap is a backed all the way out in order to tune. I read on web site that you can use a 300 nH coil from anode to C1 to rectify this. Thanks for the help, Chris