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I have been using a par end fed for my R75 for over a year now and have been quite impressed with it performance using different wire configurations. The weather warmed up today so I decided to build a dipole for it. I used a Jetstream center insulator from universal and for now 50' of 16Ga stranded copper on each leg with a dogbone at each end and some dacron between trees. I fed it to the radio with some quad shield solid copper RG6. The Par was great, but the dipole lowered my noise floor and raised my signal quite a bit. I have to use the ATT. now to listen to New York air control! My question is, it seems with the dipole I should not ground the outer shield from what I read. Is this true and should I just disconnect the coax when not in use?