Quantro operating voltage question
Posted: Fri Jan 23, 2015 5:47 pm
Playing with a Quantro for the first time, and have a operating voltage question.
The Quantro gets power from one of the MSF5000 PA power supplies mounted above. A seven-conductor cable runs from the power supply to connector J33 on the back plane of the Quantro. The Quantro itself has no internal power supply module.
Of these seven wires, according to the service manual, two are +14VDC and two are ground. With the station off, I measure 0 Ohms between the +14VDC pins on both the power supply and on the corresponding Quantro J33 pins. So, it appears that only +14VDC and ground are really necessary.
Why then is there an extra set of power wires i.e. one extra +14VDC and one extra ground?
Are Quantros 12-14 volt and Quantars 24-28 volt?
I've programmed the Quantro for use as a remote receiver, to provide 2175 Hz idle status tone and RX audio down a wireline. Ideally, I'd like to power the Quantro with a plain old 13.8VDC Astron power supply, and be able to use the MSF5000 PAs and power supplies for something else.
Thanks,
Tom
The Quantro gets power from one of the MSF5000 PA power supplies mounted above. A seven-conductor cable runs from the power supply to connector J33 on the back plane of the Quantro. The Quantro itself has no internal power supply module.
Of these seven wires, according to the service manual, two are +14VDC and two are ground. With the station off, I measure 0 Ohms between the +14VDC pins on both the power supply and on the corresponding Quantro J33 pins. So, it appears that only +14VDC and ground are really necessary.
Why then is there an extra set of power wires i.e. one extra +14VDC and one extra ground?
Are Quantros 12-14 volt and Quantars 24-28 volt?
I've programmed the Quantro for use as a remote receiver, to provide 2175 Hz idle status tone and RX audio down a wireline. Ideally, I'd like to power the Quantro with a plain old 13.8VDC Astron power supply, and be able to use the MSF5000 PAs and power supplies for something else.
Thanks,
Tom