Re: [time-nuts] 5V antenna on 3V receiver via dist. amp?
Thats fine If the 3 v rcvr complains connect a 450 ohm from the antenna to ground that should make it happy. The resistor really isn't picky On Thu, May 2, 2013 at 10:38 PM, Paul tic-...@bodosom.net wrote: On Thu, May 2, 2013 at 5:51 PM, time-nuts-requ...@febo.com wrote: A distribution amplifier (like the 58516A) should also be OK. If you are going to have a GPS receiver that can provide 5V to the antenna and amplifier, that would be ideal. Yes, my plan was to attach a 5V receiver to power in (port 1 on a 58516A) and 3V receivers to the DC-blocked ports. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 5V antenna on 3V receiver via dist. amp?
On 05/02/2013 03:26 PM, Paul wrote: Is it reasonable to to use a GPS distribution amplifier (viz. HP 58516A) to power a five volt antenna feeding three volt receivers or should I get a bias tee? The internal operation of my electronics is largely a mystery to me. Bias tee would be best because it does exactly the thing you need and no more, so it is difficult to miss some small detail and end up in a bad configuration. Bias tees have a DC connector to supply power so it will be easier to hook up. Look for models that block DC, so you don't expose your 3V GPS receiver to 5V power. A distribution amplifier (like the 58516A) should also be OK. If you are going to have a GPS receiver that can provide 5V to the antenna and amplifier, that would be ideal. Otherwise you will need to make a connector to put 5V on the DC port of the amplifier. What you don't want is a passive splitter. If you connect a power supply directly to the DC port it will short the GPS signal into the supply's capacitance and your signal will be distorted or suppressed. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 5V antenna on 3V receiver via dist. amp?
The HP58516A has no external DC power connector (unless it has the option 05Q). The receiver feeds the HP58516A and then the antenna. Maybe your antenna works downto 3V. The bias tee needs also a DC-block, otherwise you will put the 5V to the receiver's input too. On Thu, May 2, 2013 at 9:26 PM, Paul tic-...@bodosom.net wrote: Is it reasonable to to use a GPS distribution amplifier (viz. HP 58516A) to power a five volt antenna feeding three volt receivers or should I get a bias tee? The internal operation of my electronics is largely a mystery to me. Thanks. -- Paul ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 5V antenna on 3V receiver via dist. amp?
Paul It depends on the antenna the old ones were 5 and the new 3.3V. I believe 5V on a 3.3 antenna is bad and the other way around you loose gain. On the rcv side some rcvrs want to see a bit of current draw to say an antenna is attached. Regards Paul WB8TSL On Thu, May 2, 2013 at 3:26 PM, Paul tic-...@bodosom.net wrote: Is it reasonable to to use a GPS distribution amplifier (viz. HP 58516A) to power a five volt antenna feeding three volt receivers or should I get a bias tee? The internal operation of my electronics is largely a mystery to me. Thanks. -- Paul ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 5V antenna on 3V receiver via dist. amp?
On Thu, May 2, 2013 at 5:51 PM, time-nuts-requ...@febo.com wrote: A distribution amplifier (like the 58516A) should also be OK. If you are going to have a GPS receiver that can provide 5V to the antenna and amplifier, that would be ideal. Yes, my plan was to attach a 5V receiver to power in (port 1 on a 58516A) and 3V receivers to the DC-blocked ports. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
