Recent articles discussed a model for current distribution in coated conductors leading to an estimate of effective RF resistance:
- A model of current distribution in copper clad steel conductors at RF
- 80m half wave dipole made from galvanised fence wire
- 80m half wave dipole made from 0.91mm steel MIG wire
A correspondent wrote asking about the case of galvanised steel tube used as a mast, or in a lattice tower structure.
Over time I have measured the coating thickness of a range of galvanised products by scraping the zinc down and measuring the coated and uncoated sections. It is laborious and of course destructive.
This article documents a survey of on-hand materials using a non-destructive electronic coating thickness meter.
Above the EC-770 electronic coating thickness gauge used for the survey. Continue reading Typical zinc thickness on zinc coated products used for antennas