This article continues on from Implementation of G5RV inverted V using high strength aluminium MIG wire documenting impedance measurements and voltage calculations.

## Impedance measurement

Impedance was measured with an AA-600 looking into 500mm of RG400 then the Guanella 1:1 balun, then 9m of fabricated transmission line as described in earlier articles in the series. The balun is located at the antenna entrance panel and the coax shield is grounded via that panel (ie the normal operating common mode current path exists).

Above is the impedance measurement plotted on a Smith chart. This is more useful and very meaningful as an interactive display in Antscope where are you move the cursor, the frequency and key data are displayed. Continue reading Implementation of G5RV inverted V using high strength aluminium MIG wire – impedance measurements