Azelio Boriani- "Yes, as some GPSes need a DC path to recognize a valid antenna I modify the cheap satellite/TV splitters with a 270ohm (also 220, 180, 150 will do) resistor between output F connector center and the GND."
I 've done the same. I use a Mini-Circuits ZAPD GPS two output amp and feed each outputs to a 4-way 2.4Ghz TV splitter with "F" connectors (just like item number 250865005544 on the popular auction site, $14 for 2 including shipping costs) with one power pass output and 3 blocking outputs. This allows me to run a number of GPS units I'm testing with the amp gain-splitter loss not swamping the receiver. Another advantage is that the Thunderbolts use a type "F" connector and I can use ready made low loss TV cables to connect everything. I've used up to a 330 ohm resistor to fool the GPS into thinking there is a direct connection to the antenna on the 3 blocking outputs, or just live with the open antenna message. I just have to make sure I have at least one of the GPS receivers connected to one of the power pass outputs so the amp is powered. -Arthur _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
