AIS VSWR troubleshooting help please!

[GTom]

Originally Posted by S/V Illusion

The primary reason is the expected loss along a 50+/- ft run of coax at VHF would be only a few watts which is not within the level of accuracy/precision of this (and most) SWR meters.

That depends. My tiny boat has 70' from VHF to masthead, the typical RG58 has about 4dB on that length which means you end up with 60% loss. Even with great foam dielectrics you loose 1dB on that short run, which is 20% or 5W in case of 25W transmission.

[stimpsonjcat]

Watts worse is you pay for the line losses in both directions.