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HelicopterRadio - Spektrum DSM › Dx 7 low voltage
07-09-2008 06:00 PM  9 years agoPost 1
Street Flyer

rrNovice

Las Vegas, NV, USA

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Does anybody know what the low voltage is on a dx 7? I have looked in the manual and haven't found anything?

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07-09-2008 09:08 PM  9 years agoPost 2
Pinecone

rrKey Veteran

Maryalnd

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Minimum specified voltage is 3.5 volts.

I tested about 20 receivers and all ran down under 3.1 volts and as low as 2.9 volts.

Terry
Blade CP Trex 450 SE
QJ EP8v2 EX Gaui Hurricane 550
Vibe 50 Bergen Intrepid Gasser

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07-09-2008 10:13 PM  9 years agoPost 3
TorkRod

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Somewhere in Cyber US

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DX7 is the transmitter not the receiver. Probably around 9.0 volts..

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07-09-2008 10:25 PM  9 years agoPost 4
Alan Szabo Sr

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Las Vegas, Nevada

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Im pretty sure the circuit for the Xmitter is runing on 3.0 volts.

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07-10-2008 12:06 AM  9 years agoPost 5
9387ASH

rrElite Veteran

UK

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There are 2 voltage levels required in any of the Spektrum/JR 2.4 GHz.

3.3 Volts is required by the X1TXN sub module for the 2.4 GHz section, and 5V for the rest of the electronics ( ie CPU, Display, Sticks etc etc).

The Battery pack (nominal 9.6V) is fed to the power switch and is routed in 2 directions.... one 9.6 V feed to the main PCB so that the 5V regulator is powered and the other 9.6V to the RF board to feed the 3.3V regulator.

However, the Transmitter will probably function down to 6V BUT you will get a constant alarm, you will not be able to enter and system menu's as the CPU is in alarm mode (because the minimum voltage alarm has been set).

Typically this alarm will sound at 9.0V as NiCads & NiMH packs do not fare well below 9V.

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07-10-2008 12:11 AM  9 years agoPost 6
Street Flyer

rrNovice

Las Vegas, NV, USA

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Thanks. So how many hours do you guys think I can get off of the stock battery?

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07-10-2008 02:11 AM  9 years agoPost 7
Pinecone

rrKey Veteran

Maryalnd

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Duh, sometimes I jump to conclusions.

Terry
Blade CP Trex 450 SE
QJ EP8v2 EX Gaui Hurricane 550
Vibe 50 Bergen Intrepid Gasser

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