Comet SMA501 stubby

Introduction

The Author has been making commercial antennas for years. This is a report for a another commercially made one. The return loss is being 5 db on 2-meters but slightly out of band and 28 on 70-cm but out of band.

A cable was added in line to change the figures of 6 db on 2-meters and 5 on 70-cm and is out of band.

For HT use this may work in most cases especially on low power. There are other variables to the best (lowest) return figures, such as hand placement and type of radio. For example, some hand-held radios have more metal than others to which the former type helps improve that return level in many cases. This is lower than typical on the better stubbys.

This may be copied in complete form only for non-profit purposes, such as for the knowledge for the Amateur Radio Service, with the Author credited as designer. For other arrangements please contact the Author.