mkruger
Well-known member
i'm taking a break from my preamp this week. I wanted to get my new GPS installed in the truck... so here's my problem:
I want to use a handheld GPS on my active antenna that requires 5vdc at no more than 1 amp. So I built a power supply with a 7805 regulator and two BNC connectors.
The bnc connectors need to be coupled for the signal to pass and the power will need to be injected right into the antenna wire, but the GPS cannot handle the 5v. So I need the power to only go out via the Antenna BNC.
I guess my question is: What will block DC and still let a 1500MHz signal pass. I don't want to use a transformer if i can help it because I'm trying to keep the BNC jacks close together in order to keep my 50ohm signal path.
-mike
I want to use a handheld GPS on my active antenna that requires 5vdc at no more than 1 amp. So I built a power supply with a 7805 regulator and two BNC connectors.
The bnc connectors need to be coupled for the signal to pass and the power will need to be injected right into the antenna wire, but the GPS cannot handle the 5v. So I need the power to only go out via the Antenna BNC.
I guess my question is: What will block DC and still let a 1500MHz signal pass. I don't want to use a transformer if i can help it because I'm trying to keep the BNC jacks close together in order to keep my 50ohm signal path.
-mike