); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] [EMAIL PROTECTED] said the following on 07/27/2007 05:00 PM:
> I have one of these Tucker HP 8-ports GPS antenna amps/splitters too, and > they are configured to only accept an external power supply, but can be > easily > modified: > > All you need to do is add a small inductor (say 33nH, 200mA) in the > footprint that's reserved for it on the PCB. There is a location connecting > the Port > 1 center pin to the power input jack, and the 0805 component is simply > missing from the PCB. I thought about it and decided not to do that because I didn't want my whole stack of receivers to be depending on Port 1 being connected. With the external power, I still have a point of failure, but accidentally turning off a GPS without remembering the consequences isn't an issue. > With this simple modification GPS Port 1 can supply power to both the > antenna and the splitter/amplifier. > > At the same time it would be advisable to add a GDT (Gas Discharge Tube) or > TVS against lightning proximity strikes. > > This can be done by adding another small inductor (33nH, 3Amps or better > rating!) to the GPS antenna port, then connect that through the GDS/TVS to > ground. That's a good idea that I hadn't thought of... John _______________________________________________ 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.
