Frequently Asked QuestionsQ: Can I use the M1428-DV to start an aircraft engine? A: The M1428-DV GPU is inadequate for piston and turbine engine starting and should be used for airframe systems power only. Q: How does the M1428-DV connect to my aircraft? A: The Model M1428-DV Mini-GPU includes a 6’ output cable for each output, with 3-pin oval AN2551 plug, connecting between the GPU and the aircraft. If your aircraft has a yellow SB50 plug or a single-pin "piper" plug, purchase the appropriate cable separately.
Q: What if I need a longer output cable for my situation? A: The 6’ output cable, with yellow SB50 plug can be extended/doubled by plugging a yellow SB50 extension output cable onto it. These are available as a replacement part. Contact Audio Authority tech support for assistance.
Q: Can the M1428-DV be used with experimental and amateur-built aircraft? A: Yes, the Model M1428-DV 14V output is compatible with certified and experimental aircraft that have a 12V battery and a 14V electrical/charging system. However, its output cable is incompatible with the external power receptacle on certified aircraft. If your aircraft has a yellow SB50 plug or a single-pin "piper" plug, purchase the appropriate cable separately.
Q: Can I swap one of the cables that come with the M1428-DV? A: The M1428-DV GPU includes two oval 3-pin output cables, but if your aircraft has an SB50 receptacle, or a round 2-pin Piper connector, you can request a different cable at the time you purchase the GPU. Total purchase price will be adjusted accordingly. This option is only available for factory direct sales at the time of your GPU purchase. Q: Can I use the M1428-DV to charge my battery? A: The Model M1428-DV Mini-GPU is not designed for long-term battery charging. It has no circuitry for monitoring the battery’s state of charge or determining the precise charging voltage for various battery conditions and ambient temperature. So, the general answer is no. However, for short periods of time (an hour or two), the GPU’s output can be used to “top-off” the charge of a battery that is NOT serverely discharged. This is particularly useful during a powered preflight, allowing the pilot to take his/her time to check every airframe system and lights for proper operation without depleting the starting battery. To optimize battery capacity and reliability, we highly recommend full-time, maintenance charging desulfation, and recovery. Our preference is the aviation-specific BatteryMINDer products by VDC Electronics. The BatteryMINDer is designed to remain connected for long periods of time, and will never overcharge or damage your battery.
Q: Does the GPU work outside North America? A: Yes, the input voltage and frequency ranges are very wide and universal for worldwide operation: 85-264 VAC, 47-63 Hz. The AC cord supplied is a North American grounded 5-15, which can be adapted, or replaced with an appropriate cord, sourced locally.
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