Need radio help,,, please

[FloridaScaleBoater]

Have a Futaba 3PKS on 75MGHZ (Non PCM)

When mixing digital and analog servo's what does the Xmit mode need to be set to? PPM HRS

Thanks in advance

 

[moparbarn]

RRRick, PPM, HRS is for all digital, RRRobin.

 

[FloridaScaleBoater]

PPM, HRS is for all digital.

Damn,,, was hoping I had found my problem

 

[SayMikey]

No put it on HRS and your problem will be worse,causing servos to let the smoke out

 

[mercguy]

Rick

I didn't think you could mix servos even on PPM. Does the digital servos work OK on PPM?

Bill

 

[anthony scardina]

As far as I knew a digital would work fine on any rx, regardless of what else is plugged in. A guy in my club is running a digital for rudder in his sport 20 and I'm pretty sure the throttle and 3rd channel are analogs.

 

[ZZ RACING]

Yup PPM for mixing digital and analog and HRS for digital only

 

[user 6667]

ZZ Racing is correct

 

[FloridaScaleBoater]

Anyone have any advice regarding these? http://www.ebay.com/itm/like/321247794659?lpid=82

What is happening is mainly my 3rd channels starts glitching, goes ALL the way to one end of it's travel and stalls,,, them works no more

 

[Grimracer]

to much voltage.... try a regulator..

Grim

 

[anthony scardina]

Those caps are usually used where you have electronic speed controls or servos with a very large power demand. I used my cap until the wire broke, and fwiw, I never bought a new one.

 

[FloridaScaleBoater]

Question for Mike Z,,, I'm using a 2S LiFe pack 500MH That is too much voltage? Can you recommend a voltage regulator?

 

[Rudy Formanek]

Sounds like you have a bad pot on the transmitter's third channel. Does it glitch when moving the third channel?? Does it glitch when not moving the third channel, but moving the other channels?? Does putting a different servo on that channel change things. Sometimes opening up the trans and putting some corrosion x on the pot terminals where they enter the pot case helps if they are a little corroded there. But the best solution is a new pot.

 

[anthony scardina]

2s LiFe is OK without a regulator, I run one in Mt 1/12 scale pan car, and all the nitro car guys use them as well sand regulator. You would need a regulator for LiPo however, unless your rx and servos are rated for it.

 

[Grimracer]

[SIZE=10.5pt]If you are not using HV servos its just a matter of time that you will nuke the servos on 2S Life.[/SIZE]

[SIZE=10.5pt]I of course will recommend the Futaba regulator BUT.. the little 10amp Castle unit works too.[/SIZE]

[SIZE=10.5pt]http://www.futaba-rc.com/accessories/futm0961.htmlhttp://www.futaba-rc.com/accessories/futm0961.html[/SIZE]

[SIZE=10.5pt]If the servo says 4.8 OR 6V.. you are asking for trouble not using a reg with Life.. (TRUST ME)[/SIZE]

[SIZE=10.5pt]Why did I start using regulators.. simple.. I lost a model due to using Life without HV servos and a reg.. Im dollars behind because of my stupidity.. no more..[/SIZE]

[SIZE=10.5pt]Don’t care what it costs.. all my boats, helis and planes now have voltage regulators. Gota tell ya. That little Futaba unit is .5oz and works GREAT.. no heat![/SIZE]

[SIZE=10.5pt]Grim[/SIZE]

 

[dwilfong]

If the servo is not rated for 6V that will be the problem.

What servo and what are the specks on the servo?

I have bin using a LiFe 2 cell lately and have not had a issue.

Then again I only use JR servos rated for 6V.

The regulator sounds like a good deal. But I like the extra punch for my X hydro on the steering servo.

 

[Grimracer]

David.. thats what I thought..



I was wrong.....



and as for the "extra power" again.. I was wrong... It was/is not noticeable....

Here is the bottom line.. yep.. they will work on 2S life.. but.. the issue is.. how long.. 6.6V on a 4.8 or 6V servo is VERY hard on the motor and other electronic parts within the servo.

Do what you feel is best.. I choose to properly voltage my servos from now on. The cost of the model was not worth it.



Grim

 

[anthony scardina]

Oh I forgot, make SURE you don't accidently buy servos designed for helicopter tail rotor pitch...those are rated for 4.8v...we had one laying around in a bin of random stuff and it was a very fast servo but wrong voltage.

 

[Grimracer]

those are very low torque so typically its not an issue. Most boaters are not looking for that much speed or lack of power.

Grim

 

[FloridaScaleBoater]

Mike,

I had no idea those things were that pricey,,,, but I guess it's cheaper that servo's and heats come race day!