Use a methodical, logical troubleshooting technique. Most problems can be solved using common sense. A volt-ohm meter and a clear head are usually all that are needed to correct any problem. Please understand that it is nearly impossible to “troubleshoot” by phone; any specific questions should be documented and sent to us by mail.

The Benchmarq IC has been double checked to its ensure reliability and probably isn’t the problem if your kit doesn’t run.

COMMON QUESTIONS

Q.When I charge my battery pack, the discharge and charge cycles are short, and the battery doesn't seem to have the capacity it should have.

A.A battery is made up of 1.5V cells. If these do not have equal voltages, your battery capacity may be very short. To correct this, charge the battery on the C/2 (250 mA) setting, and discharge it using the low current discharge setting four or five times. For further information, please see the section labeled BATTERY REPAIR.

Q.When I energize the circuit the indicator light just blinks in the awaiting command mode ? I press the discharge start button but nothing happens.

A.Check the number of cells switch settings. Be sure that it is set to the number of cells minus one. Dr. NiCad “thinks” that you need more cells in your pack.

This can also occur when the pack is severely discharged. If you’re sure that the DIP switch settings are correct, Leave the pack connected to the charger. The circuit includes a low current “trickle charger” designed to bring the cell up to an acceptable level before fast charging. The doctor will then begin its fast charge sequence all on its own.

Q. The unit was working before, but now when I turn it on the indicator light stay off.

A. Again, check the number of cell switch settings. Dr. NiCad “sees” more batteries connected than what you have called out with the switches.

Q. The batteries don’t seem to take a full charge, that is, the time required at the charging rate that I’ve selected seems way too short. I can hear the switching supply “whistle” coming from the circuit board.

A. This happened to us, too ! Turns out that if you turn the input voltage too high that the higher currents created cause the large inductor in the switching supply to “saturate” magnetically and lose its inductive properties. Try reducing the input voltage to 12 - 14VDC, as this took care of our fast charge problem.

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Ramsey Electronics DN1 manual Common Questions
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DN1 specifications

Ramsey Electronics DN1 is a versatile and compact digital audio transmitter that caters to a variety of audio transmission needs. It is designed for hobbyists, educators, and DIY enthusiasts looking to create their own wireless audio systems. The DN1 offers a reliable solution for transmitting audio signals over short distances without the clutter of wires.

One of the main features of the DN1 is its ability to transmit audio in the FM band, which provides clear sound quality and minimizes interference. The device operates at a frequency range of 88 to 108 MHz, allowing users to choose the optimal frequency for their specific environment. This adaptability makes it suitable for applications like personal broadcasting, classrooms, or small events.

The DN1 is equipped with a simple-to-use interface, featuring adjustable audio input levels and an LED indicator for power and modulation status. It supports both mono and stereo audio inputs, making it a flexible option for various audio sources. Users can connect the transmitter to devices such as audio players, microphones, or computers, which allows for seamless integration into existing setups.

Another significant characteristic of the DN1 is its compact and lightweight design, making it easy to transport and mount in different locations. Its robust construction ensures durability, making it ideal for both indoor and outdoor use. This makes the DN1 an excellent choice for users who need a portable solution for DIY projects or presentations.

The device operates on a low-power consumption model, which is not only environmentally friendly but also cost-effective. It can be powered by a standard 9V battery or an external power supply, adding to its convenience and versatility.

In terms of performance, the DN1 boasts a transmission range of several hundred feet in optimal conditions, ensuring that audio signals remain strong and consistent even in larger areas. This range, combined with its ease of use, makes it an appealing option for those looking to broadcast audio without the limitations of wired connections.

Overall, Ramsey Electronics DN1 stands out as an innovative transmitter that brings together user-friendly features, excellent audio quality, and practical design. Whether for personal use, educational purposes, or event hosting, the DN1 meets the demands of modern audio transmission needs, allowing users to experiment and expand their audio capabilities with ease.
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