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Futaba 4PX

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04-23-2015 | 05:18 AM

#1366

DaveG28

Tech Master

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Joined: Dec 2008

Posts: 1,610

Hi guys, couple of quick questions.. I am actually looking at a T4GRS but there is very little info on that:

1. Is the fastest mode for the px TFHSS with the 304 receiver?
2. Is this mode actually legal for racing (I though telemetry was banned?)
3. I see the tx is life or nigh, but the 304 receiver can run on Lipo correct? For nitro running!

Thanks!

04-23-2015 | 07:10 AM

#1367

ATXPro4

Tech Regular

iTrader: (4)

Joined: Feb 2005

Posts: 452

From: Austin TX

Quote:

Originally Posted by DaveG28

1) The tfhss and the 304 receiver it comes with offer the fastest response. Although I have not found any info about what the response is with the more expensive fasst receivers.
2)It is legal for racing. I think what is banned is the ability to change things such as setting in the ESC from the radio.
3)The 304 receiver can support up to a 2s lipo. I use one in my nitro and really like that I also get the voltage of that battery displayed on the radio.

04-23-2015 | 09:43 AM

#1368

JayL

R/C Tech Elite Member

Joined: Mar 2006

Posts: 3,111

From: Ca

if the frsky are C1 mode like the 3pk ones, then they will not work

the best recv for the 4px are T-FHSS and those are only $49.99 new

04-24-2015 | 01:56 PM

#1369

Frank L

Tech Lord

iTrader: (148)

Joined: Dec 2008

Posts: 12,520

From: NorCal

Quote:

Originally Posted by Shawn_S

Lipo is fine. In both the manual and Tower's product page, 7.4v/8.4v is listed as acceptable. I've been running an old rx Lipo in my 4PX for a couple months, been great. The 1850mah LiFe I was running didn't have the capacity I needed.

Futaba recommends a LiFe batt. Why chance it on one of the most important pieces in your RC collection. Especially when the LiFe batts are less than $16...

http://www.hobbyking.com/hobbyking/s...dProduct=28650

I have been using these in my 4px and my sons 4pls without issue.

04-25-2015 | 07:05 AM

#1370

the wrench

Tech Addict

iTrader: (3)

Joined: Jan 2013

Posts: 589

Quote:

Originally Posted by JayL

if the frsky are C1 mode like the 3pk ones, then they will not work

the best recv for the 4px are T-FHSS and those are only $49.99 new

ahhh that stinks, the frsky's were about 24 a piece shipped! maybe i should look into the 4pks-r instead, would that be c1 compatable? is there any side to side comparisons to the 4px vs pks? i mean how much better can it be?

sorry to ask, i just dont want to end up buying a new receivers every year futaba decides to release a new radio

04-26-2015 | 12:12 AM

#1371

toddmanley

Tech Apprentice

Joined: Dec 2013

Posts: 78

From: Bay Area, CA

I need some assistance in getting the lap buttons set up. For some reason I have it running fine on my old 4PLS but can't get it working on the 4PX. I've searched this thread and other places online with no luck. Any help is appreciated.

04-27-2015 | 06:17 AM

#1372

Shawn_S

Tech Addict

iTrader: (20)

Joined: May 2011

Posts: 742

From: Emerald Coast

Quote:

Originally Posted by Frank L

I don't shop at Hobbyking anymore, it'll be a cold day down below before I do again. An ounce of customer assistance is worth any savings they might seem to offer.

As I said earlier, Futaba'a promotional video shows, 2s comma LiFe comma NiMh. I took that to mean 2s Lipo compatible. Additionally, the voltage warning in the radio is adjustable up to 8.0 volts. Why have it able to go that high, if its not compatible? There aren't any esc's on the market that I'm aware of that let's you adjust cutoff past its cell limit.

04-27-2015 | 07:29 AM

#1373

cutting42

Tech Regular

Joined: Mar 2013

Posts: 261

From: London UK

Quote:

Originally Posted by the wrench

sorry to ask, i just dont want to end up buying a new receivers every year futaba decides to release a new radio

Possibly a little unfair. the PX is the first radio I am aware of that supports multiple RX technologies. The new T-FHSS, FHSS, S-FHSS and C2 FASST. The only unsupported is the C1 FASST.

I bought one as I could use all my old RX as well as the new fast T-FHSS.

The Orange R400F is C1 and C2 compatible so should work with the PX and is cheaper.

04-27-2015 | 12:30 PM

#1374

JHN1

Tech Adept

Joined: Dec 2008

Posts: 120

From: CA.

New radio

Hello everyone

I am going to buy a radio today and it's down to futaba or specktrum my question is how user friendly is the futaba vs the specktrum. I've used the old specktrum Dx3r pro for last 3 years so I am comfortable with it but I want something new. Any help would be greatly appreciated since I am buying the radio today.

Thanks
John

04-27-2015 | 12:41 PM

#1375

DirtyDanLand

Tech Initiate

Joined: Jan 2015

Posts: 44

Quote:

Originally Posted by JHN1

The 4px was my first high end radio, I came from using a spektrum dx3c. I found the menu system of the 4px very easy to use and navigate.

04-27-2015 | 09:50 PM

#1376

Qwkrn U

Tech Elite

iTrader: (133)

Joined: Dec 2010

Posts: 2,452

From: Osage Beach, MO

Quote:

Originally Posted by Troy Mckune

I sent this to Futaba support tonight but if anyone on here has the same issue please help:

Futaba Support,

Hello, I have a 4PX that I use in offroad and onroad racing. Since new a few months back I have a stuttering servo problem. If I crank the wheel back and forth quickly it seems smooth. If I move the wheel back and forth normally and even stop and hold, the servo seems to want to jump around and is real jittery. I have tried both the stock receiver and the 204GF-E. I have tried multiple servos: Xpert 3431, Futaba S9351, Orion 1409. I have set them all to analog as well as digital with the same results. Tonight I upgraded to 1.1 and still the same. I even tried putting the ESC in the #1 slot and the servo in #2 slot and used the my throttle finger to steer with the same results. This gave me the conclusion that it is not the wheel. The throttle and braking on the other hand is really smooth.

I am at a loss. I have raced for over 20 years and have used multiple transmitters. I recently had the KO EX-1 for a year and the Spektrum DX3R Pro for the 4 previous years. I don't think I am doing anything wrong.

Is there a setting I should check or something I can try? Is the response just so quick the it makes the servos jittery or stutter?

Thanks for the help,

Troy

Make sure you've updated the firmware. Had this issue as well before the firmware update.

04-28-2015 | 09:50 AM

#1377

190mph

Tech Master

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Joined: May 2004

Posts: 1,117

I held the 4PX in my hand at the Hobby Shop on Sunday and oh my god! I am getting this thing!

Anyways a question for the Life Battery. Protek shown below. I don't right now have Life capable charger as I have the LRP Pulsar 3 and older Turbo 35 GFX.

So to get something low cost with this capability what is good way to charge this? I only see Life batts as this and receiver pwr pack for Nitro cars.

Also do you charge in the Futaba connector or Balance connector?

04-28-2015 | 04:42 PM

#1378

Lil Paul

Tech Regular

Joined: Mar 2006

Posts: 284

You would charge the battery outside of the radio. I have that exact battery and i plug it directly into my charger and connect balance lead to balance board. It is a bit of a hassle having to remove the battery every time you need to charge, but I race alot and charge 1-2 times a month. Usually closer to once a month, so its really not an issue.