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Old Aug 21, 2012, 07:14 AM
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Originally Posted by ronwc View Post
You can get the Futaba R2006GS SFHSS 6 channel rx for the 8J for $35 from helidirect.
Cheers - sadly out of stock at the mo!
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Old Aug 21, 2012, 09:35 AM
Ron - AMA 1025
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USA, FL, Largo
Joined Aug 2005
267 Posts
rx

Quote:
Originally Posted by ozzieparky View Post
Cheers - sadly out of stock at the mo!
I ordered 6 from them in the last week or so, must have run out.

Can also get them here for $39 with free shipping - http://www.ebay.com/itm/Futaba-R2006...item5ae8fa2511
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Old Aug 23, 2012, 01:58 AM
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South Africa, GP, Krugersdorp
Joined Jul 2012
167 Posts
T8J Battery

Hi all,
Here is the battery I'm using.Its a 7.4V Li-Po 2600mha.
It was just plug and play, TX pick it up right away and on
the display was showing the battery sign with 7.4V inside.
As I have been using it ,it just counts down as battery voltage
are dropping.After many hours now it has droped to 6.9V.
Not sure what the limit is.Nice about the Li-Po is I use same
charger as for flight packs.

One thing i liked was how easy and quickly it is to pair with a RX.
Just hold in switch for a few seconds till green light comes on and
your done.
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Old Aug 23, 2012, 03:39 AM
Radio? Screwdriver!
United Kingdom, England, Bristol
Joined Aug 2011
907 Posts
7v I'd charge if I was going flying for the day, 6.6v is probably the lowest I'd go for a 2S lipo. Don't go below 6v.

Si.
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Old Aug 23, 2012, 06:34 AM
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Quote:
Originally Posted by SONICX View Post
Hi all,
Here is the battery I'm using.Its a 7.4V Li-Po 2600mha.
It was just plug and play, TX pick it up right away and on
the display was showing the battery sign with 7.4V inside.
As I have been using it ,it just counts down as battery voltage
are dropping.After many hours now it has droped to 6.9V.
Not sure what the limit is.Nice about the Li-Po is I use same
charger as for flight packs.

One thing i liked was how easy and quickly it is to pair with a RX.
Just hold in switch for a few seconds till green light comes on and
your done.
What is that second Pic of? I see front of prop on top and control surfaces?
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Old Aug 23, 2012, 06:57 AM
Radio? Screwdriver!
United Kingdom, England, Bristol
Joined Aug 2011
907 Posts
Quote:
Originally Posted by SONICX View Post
One thing i liked was how easy and quickly it is to pair with a RX.
Just hold in switch for a few seconds till green light comes on and
your done.
I really don't like how Futaba do their bind mode at all. I dislike the fact that it'll lock onto any Futaba S-FHSS transmitter nearby - not necessarily yours!

I'd love to see what would happen and how easy it is to try to bind in a busy, close environment such as indoors flying.

Si.
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Old Aug 23, 2012, 08:03 AM
Ron - AMA 1025
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USA, FL, Largo
Joined Aug 2005
267 Posts
Quote:
Originally Posted by SimonChambers View Post
I really don't like how Futaba do their bind mode at all. I dislike the fact that it'll lock onto any Futaba S-FHSS transmitter nearby - not necessarily yours!

I'd love to see what would happen and how easy it is to try to bind in a busy, close environment such as indoors flying.

Si.
Tx has to be close, within 20" or less to bind.
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Old Aug 23, 2012, 08:23 AM
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Joined May 2012
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Quote:
Originally Posted by SONICX View Post
Hi all,
Here is the battery I'm using.Its a 7.4V Li-Po 2600mha.
It was just plug and play, TX pick it up right away and on
the display was showing the battery sign with 7.4V inside.
As I have been using it ,it just counts down as battery voltage
are dropping.After many hours now it has droped to 6.9V.
Not sure what the limit is.Nice about the Li-Po is I use same
charger as for flight packs.

One thing i liked was how easy and quickly it is to pair with a RX.
Just hold in switch for a few seconds till green light comes on and
your done.
How many hours are you getting out of it ? Where did you get and for how much?
I have Futaba's HTF1700B 1700mAh which doesn't last very long. My other TX
packs, 2600 (8 pack replacement) will last for days, but obviously
don't fit on the 4 pack slot.

Thanks
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Last edited by Felix the kat; Aug 23, 2012 at 08:34 AM.
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Old Aug 24, 2012, 04:08 AM
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UK
Joined Sep 2010
19 Posts
Sorry guys but apart from being able to charge the tx battery on your normal field charger I don't understand the benefit of using lipo's in the tx. Surely it means you can't charge the battery in the tx and you have to be careful about charging / storing / transporting etc, etc.

Do you get longer from them than you would from say eneloops which have just been mentioned by Si?

Sam
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Old Aug 24, 2012, 04:38 AM
Radio? Screwdriver!
United Kingdom, England, Bristol
Joined Aug 2011
907 Posts
Quote:
Originally Posted by ozzieparky View Post
Sorry guys but apart from being able to charge the tx battery on your normal field charger I don't understand the benefit of using lipo's in the tx. Surely it means you can't charge the battery in the tx and you have to be careful about charging / storing / transporting etc, etc.

Do you get longer from them than you would from say eneloops which have just been mentioned by Si?

Sam
Couple of advantages:
  • LiPo's have a higher power density than NiMh (i.e. for the same size, it has a greater capacity).
  • A lot of the new LiPo's can be charged at a much faster rate than NiMh - some as much as 5C capacity
  • Very, very low self discharge. Lower than eneloop.

Obviously there are disadvantages such as a volatile chemistry (very dangerous to leave a pack in a unattended car), require balance charging, minimum battery voltage (i.e. leave the transmitter on till its flat and you'll kill a LiPo), etc.

For the most part eneloops are sufficient for transmitters. Also, as transmitters are usually designed with NiMh packs in mind, they tend to balance better with a heavier pack.

Personally, in my Aurora 9 (my main transmitter), I use a LiPo because it gives around 22-24 hours run time which means I only really have to charge my transmitter every couple of months. If I forget to charge it and its getting a bit low, I can charge it at a 2 to 4C charge rate and its full and ready again in 20-30minutes. Useful if your forgetful like me! Also the Aurora 9 has a LiPo mode for a minimum voltage - so if you leave the transmitter on and flatten the battery, it'll cut the power before it kills the battery. I don't think the T8J has this.

However on a LiPo you can't just plug it in the day before and leave it to charge overnight, like you can with a NiMh.

So its up to you and whatever you prefer - nothing wrong in using a NiMh or Lipo - or even a LiFe pack. There does tend to be obsession over using LiPo's in transmitters. If they're needed or not is a bit of a contentious matter.

Si.
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Old Aug 24, 2012, 07:59 AM
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Joined May 2012
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8J and Gyro

Hi everyone, I have two identical 450's with my 8j and R2008 Rx's.

The situation is, one of them the Gyro is set to sw A at 65% AVCS /35% normal and works like a charm. Detrum GY48V and Emax 9257 servo.

The other one doesn't work properly with the A sw. and must do it through the VR knob at VERY little rotation from dead center. The only difference is the servo on this one is a GOTECH, digital, coreless, ball bearing servo. (cheapo) If it's set to sw A it goes berzerk, wagging, jitters........the works.

Have tried swapping servos, new GY48V, zero delay, have played with the TX to the same settings, no binding on travel, limits are fine, both servos are "digital" but they must be operated under normal to prevent overheating.

I always standarize all my birds in order to avoid confussions and different checklists when flying.

Does anybody knows what in the world is going on here? Running out of options. ANY sugestion will be appreciated. Hope is not the RX as they are NOT cheap and less than 2 months old each.

Thanks
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Old Aug 25, 2012, 02:23 AM
numnutchris
Joined Sep 2009
407 Posts
Have you also swapped Rx:es between the helis?
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Old Aug 27, 2012, 08:53 AM
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Joined May 2012
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Quote:
Originally Posted by numnutchris View Post
Have you also swapped Rx:es between the helis?
Thanks for the suggestion, didn't quite got that far. Turned out to be the switch was assigned in two functions on the TX. Guess this threw it off.
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Old Aug 28, 2012, 03:25 AM
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South Africa, GP, Krugersdorp
Joined Jul 2012
167 Posts
I'm not sure howlong the 7.4v 2600mha will last ,I have only charged it once
so far and it is not flat yet.I use the TX currently for Flight Simulation on PC
and testing and setting up of models.

The second photo is of my R2106GF RX for park flyers using S-FHSS.
It was fearly cheap at R395-00 SA.Sure I can get even cheaper if I shop
around abit.
I'm still networking Gauteng for the best prices and suppliers.
Only been back in RC for a few months now.
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Old Sep 04, 2012, 08:25 AM
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United States, NC, Raleigh
Joined Nov 2011
237 Posts
Well, fairly new to the hobby (7 months) after 2 mail in repairs in 2 1/2 months on current transmitter (which was purchased new) I decided I'm not that deep into models yet and could move to a another brand that I think will be more reliable.

Took the plunge and ordered the 8J today. Really looking forward to this transmitter. It had a great feel for me whenI held it at a local shop.
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