I have a 50-ft. coax run from transmitter to antenna. Coax choices available to me are RG-8X or RG-213/U, both of equal manufacturing quality. The cost of the RG-213/U is roughly double that of the RG-8X. My question: Does the performance of RG-213/U -- At 50MHz -- justify its double cost? 73, KC5AN John in TX