This design has been around for a long time and we thought it woudl be good to have a 2m Yagi antenna to use to find the tracker if all our other tracking methods fail
This design was by Joe Leggio WB2HOL who has a great write up here on how to build one so I wont cover that here. We also used Martin E. Meserve website on VHF/UHF Yagi Design.
We used the website to get the exact dimensions of the reflector, driven element and parasitic elements.
2m Tape Measure Yagi
The driven element needed a hairpin match to enough inductance to cancel the capacitive reactance of the driven element.
A hairpin match and feedpoint on the driven element on the tape measure yagi
With the use of the Kenwood TH-D72A and a SWR meter we were able to tune the antenna to SWR of 1.05 at 145.175Mhz
Using S/SWR meter to tune 2m Yagi antenna for 145.175Mhz APRS frequency
Our iGate is now mounted in the 4WD.
- The laptop has a custom wooden mount which sits on the centre console of the defender
- The Kenwood TH-D72A sits in the drinks holder. An antenna mounted o...
We flew our tracker when Robert from Wotzup gave us the opportunity to fly our tracker as a secondary tracker on his balloon recently. It was a great opportunity to test the tracker as well as the new...