Kontronik 120hv Jive BEC

[Jeremy F]

Is the bec sufficient to run the align 610 cyclic servos on the 700e fbl? Do I have to use a back up battery and have to up the voltage from 5v?
I am currently using a gryphon regulator and 3600 2s lipo for receiver power but wanting to eliminate all this for a cleaner set up. Using vbar for the fbl unit too.

Cheers

Jeremy

[Blink 182]

The bec with a slave cable runs everything just fine. You can use a buffer pack for peace of mind.

[terrabit]

I'm running my 700E electronics, including vbar, off the Jive 120 BEC without a buffer pack. Been doing that on various helis for years without issue. An 800mAh NiMH buffer pack would allow you to auto your heli under control in the event of a BEC or pack failure. A few people do run them. I am considering that myself.

PS: default voltage off the Jive's BEC is 5.7V.

[Mystic3D]

Originally Posted by terrabit

I'm running my 700E electronics, including vbar, off the Jive 120 BEC without a buffer pack. Been doing that on various helis for years without issue. An 800mAh NiMH buffer pack would allow you to auto your heli under control in the event of a BEC or pack failure. A few people do run them. I am considering that myself.

PS: default voltage off the Jive's BEC is 5.7V.

5.6 V is default. Not that .1V makes any differernce.

[terrabit]

Originally Posted by In_to_the_Mystic_2003

5.6 V is default. Not that .1V makes any differernce.

I stand corrected.

[colcha]

Where can I purchase a good buffer pack with the correct plug? A link would be great!

[llbr22]

I use the one that came with one of my Spektrum radios:
http://www.horizonhobby.com/Products...ProdID=SPM9520
I have it on a switch for convenience, but most of the time I forget to switch it on.

[Jeremy F]

so if i chose to run receiver buffer pack do i use it connected to a switch then the lead from the switch goes to a empty port on the vbar??

thanks

Jeremy

[llbr22]

No, to the receiver.

[Jeremy F]

Originally Posted by llbr22

No, to the receiver.

No I don't use receiver I use vbar with sats

Cheers

Jeremy

[llbr22]

Oh, sorry.. then I think vbar but not sure.

[Mystic3D]

Originally Posted by colcha

Where can I purchase a good buffer pack with the correct plug? A link would be great!

Cheapbatterypacks.com
Make your own
4 Cell NiMh
AAA 800-1000 Cells, Not Eneloop for this application
I choose square pack, as it fits on the side of RX Mount
JR/Futaba RX Plug with 20 ga wire(I think, not 100% on ga)

THen just get a HD JR Switch between the RX/Vbar and pack,
1. Switch on before plugging in Lipo to let RX/VBar power up

Now you can power up electronics with buffer pack for testing.
Once in a while Cycle the pack.
No need to charge as Jive BEC does that for you

[llbr22]

+1 on the switch. I love having the switch there for testing electronics safely at home.

[colcha]

In_to_the_Mystic_2003 - I appreciate the detailed response! Some questions:

Originally Posted by In_to_the_Mystic_2003

Cheapbatterypacks.com
Make your own
4 Cell NiMh
AAA 800-1000 Cells,

I read somewhere that a 800mah AAA pack has significantly higher internal resistance than a 2000mah AA pack. Any truth to this?

Not Eneloop for this application

Any particular reason for this? It would be nice to use a low discharge battery.

Switch on before plugging in Lipo to let RX/VBar power up

What is the consequence of doing it the other way round? Not trying to be smart - just curious.

Is the following switch OK for this purpose?:http://www.amainhobbies.com/product_...ging-Connector

[Mystic3D]

https://www.helifreak.com/archive/in.../t-298550.html

AA is better than AAA as they can handle the amps better.

Basically it's weight vs capacity. I have tried both the (4) AAA Eneloops, and (4) 2/3A Elite. The AAA Eneloops are the lightest, but the 2/3A handle the amps better.

Better to have the electronics engaged before powering up the Jive so Rx/Vbar is sending a low Throttle signal. Also what Kontronk recommends.

Not sure about IR on AA vs AAA.

[Jeremy F]

Originally Posted by In_to_the_Mystic_2003

Cheapbatterypacks.com
Make your own
4 Cell NiMh
AAA 800-1000 Cells, Not Eneloop for this application
I choose square pack, as it fits on the side of RX Mount
JR/Futaba RX Plug with 20 ga wire(I think, not 100% on ga)

THen just get a HD JR Switch between the RX/Vbar and pack,
1. Switch on before plugging in Lipo to let RX/VBar power up

Now you can power up electronics with buffer pack for testing.
Once in a while Cycle the pack.
No need to charge as Jive BEC does that for you

so i connect the buffer pack to the switch, then the lead from switch goes to any empty port on vbar?? how does the jive bec charge the pack?

atm i have the red wire from the jive disconnected so there fore i put that back in place then use the slave cable too?

cheers

Jeremy

[Mystic3D]

Originally Posted by Jeremy F

so i connect the buffer pack to the switch, then the lead from switch goes to any empty port on vbar??

Correct on wiring, Must go into a servo port on Vbar, except RX2

Originally Posted by Jeremy F

how does the jive bec charge the pack?

It outputs voltage which is all you need to charge

Originally Posted by Jeremy F

atm i have the red wire from the jive disconnected so there fore i put that back in place then use the slave cable too?

Yes

[Jeremy F]

Originally Posted by In_to_the_Mystic_2003

Correct on wiring, Must go into a servo port on Vbar, except RX2


It outputs voltage which is all you need to charge


Yes

Thanks!

Cheers

Jeremy

[Wizza]

Ok... I'm thinking of giving this a go and dropping my reg. Question on my mind, how would you know that the Jive BEC has failed and you need to land quickly on your second backup battery pack..??? Would you have any idea..???? If not, on startup, how would you know if your Jive BEC has failed..???? Maybe we need one of those little battery monitors on the secondary battery pack..????

Intersted in some thoughts and comments here. I like the idea...

[terrabit]

The Jive BEC is pretty much bullet proof. Jives indicate a number of different status conditions through a sequence of repeating flashes of a small LED. The buffer pack is intended more as a backup incase the ESC fails or becomes disconnected from the main flight pack. I'm not sure that I've heard a single case where just the BEC has failed.