Question: What is the dB loss through the arrestor?
Answer: When ANYTHING is put into the radio circuit it introduces some amount of loss. Adding a longer coax, adding connectors, arrestors, etc. all add some degree of loss. Having said that, most of these items add a minuscule amount of loss (escpecially at HF freqeuncies). Our arrestors have less than 0.1dB through them, which is difficult to measure, let alone hear.
Question: Can the Morgan M-308H or M-309H be used outdoors without weatherproofing?
Answer: Because the M-308H and M-309H are in a plastic sealed box, they can be used outdoors. We recommend periodically checking tightness of connectors and cleaning.