Partyline: Can I use the +30 Vdc from the PL to charge a 2-way radio?
Question: I have hard mounted a radio charger on top of my TW-47 and would like to tap off the 24V of the in coming PL line. I need 15VDC and less than 800mA for the charger and have a voltage regulator that can take upwards of 30V input. I have the filtering caps for in and out as well. Question I have is would this load the PS strangely? Is there somewhere on the TW-47 board that I could grab unregulated 24V and then feed it to my voltage regulator so that it wouldn't load the PS?
Answer: The Simple answer is NO this is not recommended
The answer depends on the size of the party-line system. As more items are added to the party-line the main station and or the power supply has less spare current to supply for 3rd party devices such as a charger for a 2-way radio. The typical Encore main station and or power supplies can provide up to 1.2 amps to power external devices such as remote panels and stations and or beltpacks.
In the case of the question above the user wants to dedicate approximately 0.8 amps for a charger for a 2-way radio, this would use approximately 67% of the available current from the main station. That would leave approximately 0.4 amps for Clear-Com devices such as beltpacks which draw approximately 50 ma each, this would leave enough current to power approximately 8 beltpacks. Remote panels draw approximately 0.1 amps each, this would allow for only 3 remote panels on the system.
So in the case of a system using one main station or power supply I would suggest that adding a charger using a large amount of current would not be a good idea to introduce into the PL power chain.
Answer: The Simple answer is NO this is not recommended
The answer depends on the size of the party-line system. As more items are added to the party-line the main station and or the power supply has less spare current to supply for 3rd party devices such as a charger for a 2-way radio. The typical Encore main station and or power supplies can provide up to 1.2 amps to power external devices such as remote panels and stations and or beltpacks.
In the case of the question above the user wants to dedicate approximately 0.8 amps for a charger for a 2-way radio, this would use approximately 67% of the available current from the main station. That would leave approximately 0.4 amps for Clear-Com devices such as beltpacks which draw approximately 50 ma each, this would leave enough current to power approximately 8 beltpacks. Remote panels draw approximately 0.1 amps each, this would allow for only 3 remote panels on the system.
So in the case of a system using one main station or power supply I would suggest that adding a charger using a large amount of current would not be a good idea to introduce into the PL power chain.
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