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HelicopterRadio - Spektrum DSM › Anybody tried a Dimension Engineering switching regulator in their Tx?
07-12-2008 12:43 PM  9 years agoPost 1
robhurlin

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Pretoria, South Africa

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This should solve our lipo problems:
http://www.dimensionengineering.com/DE-SW033.htm

Instructions for installation are given here:
http://www.dimensionengineering.com...pektrum_mod.htm

Has anyone got any experience with these units?
Can we trust them and is it worth hacking our DX* radios??

Rob.

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07-13-2008 05:07 AM  9 years agoPost 2
drdot

rrElite Veteran

So. California, Orange County.

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fwiw..

One of our guys has added this to a couple JR 2.4 Txs, 3S lipos ...No problem so far, actually should reduce current drain slightly...

John.

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07-13-2008 05:31 AM  9 years agoPost 3
littwitt

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MO - US

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This has been done previously with more than double the run time. The MAH use with the linear regulator was about 325mah.
With the switching regulator it was between 125/150 mah.
If you are going to do it make sure you don't peel the foil from the pcb board or you'll be calling the warranty center & they will charge you $60.00 to replace the rf board. I know from experience.

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07-13-2008 08:18 AM  9 years agoPost 4
TheSteve

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Vancouver, BC, Canada

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I've done the mod to several radios including the x9303 and 12x. It doesn't make a huge runtime difference when running a DSM2 receiver but really does if you use DSM.
The PCB that holds the regulator is pretty cheaply made so it is possible to lift a trace. If you do its not a big deal as you can run a wire to a part that connects to the same place.

I know my x9303 used less then 100mah when running in DSM2 mode once the regulator was added, that translated to 20 hours of runtime when used with an Sanyo Eneloop pack.

It also tends to reduce the buzzing sound that DX7's, x9303's and 12x's often have.

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07-13-2008 08:52 AM  9 years agoPost 5
robhurlin

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Pretoria, South Africa

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Thanks guys,

So it seems I can put it in my 9xII (9303) and 3810 as well?

Looks like a safe way to use a 3S LiPo and even better on time.
I'll order some today!

Rob.

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07-14-2008 12:28 AM  9 years agoPost 6
9387ASH

rrElite Veteran

UK

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Rob,

The Dimension device they are referring to is the replacement for the 3.3Volt regulator feeding the Spektrum T1XTN RF sub module.

As you are talking about using a 9XII or X-3810, this would be no use to you at all.

The main pcb's require 5V to supply all the electronics and sticks etc on the board. The battery supply is also fed to the antenna pcb to feed raw battery voltage to the RF Module via the power switch.

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