Antennas for GPS units by Garmin, Furuno, Raymarine and more at The GPS Store, Inc. Passive Patch Antenna- Application Note By. Patch antenna’s radiation pattern shows that the. Than 30 degrees and should be routed away from. Trex GPS Handheld Receiver. The Garmin e. Trex GPS has been replaced by the Garmin e. Trex H >>The. Trex GPS is a six ounce, 1. Find great deals on Gps garmin etrex 30. Within 3m -12 Parallel Channels Internal Patch Antenna B. Garmin etrex 30 in GPS. Check out Bizrate for great deals.

Re-radiating antenna How to make a re-radiating antenna for the Garmin Etrex family, using the GA27 active antenna, by Heinrich Pfeifer. Motivation: Before I upgraded to the Etrex Vista I used the GPS12XL for some years. And while the GPS reception in my car is very bad with the receiver mounted in an easy-to-read position, I used the GA27 antenna put on the dashboard. Sap Spool To Pdf Conversion Program here. Now, the Etrex family does not come with a connection for external antenna.

There are some re-radiating antennas on the market but I found a way to save this money, using the old GA27. Please note that this is not an instruction to make a receiving antenna. I made e repeater system and I used a commercial receiving antenna with amplifier. The basic idea: The basic idea was not mine. I read a paper written by Dave Martindale. He made a re-radiating antenna for his GPS38, long before the Etrex family came out. I found his instructions very clear and, in the end, correct.

You find it and you should read it in order to understand what I did. There is only one point that I did not find working: he recommended a GPS45 helix antenna to be used as the transmitting antenna but this did not work well with my Vista. The final arrangement is shown in the following diagram. I made the transmitting antenna, and the adaptor box. Within this box, power supply for the Etrex and for the GA27 is generated out of the car supply (12 to 14 Volts), and the antenna signal is coupled to the transmitting antenna. The transmitting antenna: It was very easy to make the transmitting antenna out of a silver plated copper wire.

I found that it is essential to keep the whole wire length at approximately 190 mm (one wavelength), but it is not required to have the full length on top of the Etrex body. So I found a way to fix the loop on a small printed board, and this board is fixed by a screw and some glue on the Pfranc connector for power supply, see the photos below. I just connect the power supply and the antenna is in place.

Works very well. The reception is stronger than with the pure Etrex.

The wiring Dave Martindale gave instructions on how to do the power supply of the GS27 and the wiring. I did all as he said, but I use only one MCX connector on the supply box. The wire leading to the antenna loop is soldered directly to the coupling capacitor inside the box. I don't need the additional BNC connector, and this way it was easier to keep all connections in a good 50 Ohms shape. Nfs Underground 2 Widescreen Patch Hd.

The Adaptor Box For the power supply of both the Etrex and the GA27 I use only one current loop, see the diagram below. The upper part of the diagram is the supply for the Etrex. I use a variable linear regulator LM117 to create the 3 volts needed. The capacitors in the diagram are not given as values. They are bypass or coupling capacitors and everyone will prefer other values. In general a linear regulator is not a good solution here because most of the 12 volts from car supply is wasted, so a switching regulator is generally said to be better. But note the 5.1 Volts Zener diode in the supply line.