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This is a 1/4 wave shorted matching stub so it's a good idea to use quality cable. The RG-58 will have a good deal of loss when used as a matching stub even at lower power levels. I'd use at least RG-8. It may be a good idea to cut this a little long and trim the shorted end to get the best match in the omni mode. Since the coax stub runs down the mast it should be easy to cut an inch at a time off and twist the conductors back together to check the SWR.

[QUOTE="Shockwave, post: 414571, member: 10882"] This is a 1/4 wave shorted matching stub so it's a good idea to use quality cable. The RG-58 will have a good deal of loss when used as a matching stub even at lower power levels. I'd use at least RG-8. It may be a good idea to cut this a little long and trim the shorted end to get the best match in the omni mode. Since the coax stub runs down the mast it should be easy to cut an inch at a time off and twist the conductors back together to check the SWR. [/QUOTE]

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