Ok and that is fine. But I was responding to the the person who said he installed a Novak Cap ON AN LRP Q2 ESC (not a receiver) and was complaing that it made no difference in the performance of his Spektrum. The reason it made no difference is because he was using an incorrect cap.

I never once mentioned anything about a receiver. I understand that a receiver is different!

And my information is correct!! Please read posts fully and make sure you understand their meaning before you start to bash.

I was not at all intending to bash you. I only view this thread to gain info on the problems with a system i use. He was talking about the reaction of his servo and the installation of the cap that didnt make a difference. Sorry if i made you feel as if i was bashing. This was not my intension.

Now that i went back is he installing the cap on the speedo or reciever ?????????????????? Put the worlds kit on the speedo because i guess they need one . I run keyence wich doesnt require a cap. But he would also need to put one on the reciever wouldnt he?????

"This evening, I installed the cap (Novak 4700uF) on my QC2; but, there was no improvement. The KO 2343 servo that I got yesterday is totally erratic when receiving steering inputs; and, the lights on my Spektrum receiver and transponder go off and one; except for when I move the wheel really slowly."

Read my cut and paste above, he was installing the cap on his ESC! With my personal experience, as long as there is a cap on the ESC there doesn't need to be one on the receiver. But this is for my situaltiuon only. Cannot say if it will work for everyone. But when you take into consideration of what a cap actually does and the problems some have had with the Spektrum, you could assume that the cap on the ESC would be all you need. But once again, it needs to be the correct cap. Not any cap will work for this application.

if you use airtronics stuff you would have no problems...mixing is gay

I have a KO system with an QC2 speed control and and airtronics 357 reciever. If my car get about 20 feet from me it goes into failsafe mode. This is after I sent the reciever back for updates. I have Novak cap kit on the speed controller not because of this I had it before.
I only have the cap because in theory it will make the speed controller more consistant on partial throttle. (I didn't notice a difference.)

This system is just a Pain in the A$$ I have had it since
march and Have only used it for a Half day of racing.

Likrim: "...mixing is gay" WTF does that mean?

Did you just drop the "F" bomb dave!!!!!

I would suggest a cap on both. The bec on the Q2 is on the low side to start with isnt it? Not sure. You have to admit there seems to be more problems with the lrp speedos and the spektrum than with any other speedos so far. Meaning using the two together.

Wow! Did I start some interesting dialogue or what???

Interesting thing is that the World's Kit comes with a really small cap (maybe 2000uF?) and a big one (maybe 10,000uF). They give you the choice of one or the other; but, recommend that you start with the smaller cap per the instructions.

Gotta call the first as being "Baby Bear" and the other as "Papa Bear" in my mind. I choose to go with a "Momma Bear" by picking something in between (the Novak 4700uF).

Per LRP, "the larger cap gives maximum power and best possible acceleration". The smaller cap "is a great compromise, as it increases power/acceleration as well as run time".

Next week, I am headed off to 4 Fun to meet up with The Master, Todd Hodge; and then will be spectating at the Reedy race at the end of the week. Should be able to get some answers there.

Appreciate all the input; but, I am still in a quandary. Got the whole weekend to experiment though.

Thanks.

Bill

croy,

When I had the Airtronics 94357 with the QC2, I didn't have quite this issue; but, things weren't great either. My 94357 hasn't survived in the JRX-S without a servo saver installed. So, I gave the KO 2343 digital a shot per a recommendation.

I can't blame the QC2 because it was developed BEFORE the Spektrum. Seems like Spektrum folks never tested the QC2 with KO servo combo to be able to forewarn us about any incompatibility issues.

Going out to work on the car...

OK after a couple hours of testing, I have come to the following conclusions.

My original Airtronics 94357 servo has been damaged the whole time it has been in my JRX-S.

For reasons unknown to me, a new KO 2343 servo is just plain incompatible when teamed with the Spektrum and QC2 system. Nothing I have tried cures that issue. I give up on that quest.

Went out and bought a replacement Airtronics 94357 servo and put it into the JRX-S. The car has never been better. Problem cured...Installed a servo saver to keep it that way too.

Now...I can finally start working on some asphalt setups for my JRX-S...And then, off to the Reedy.

Thanks all for your thoughts.

I got a reply from John Adams himself that may shed some light not just on the LRP Sphere & SPEKTRUM combo but that of the QC2 and any LRP ESC combination with the SPEKTRUM as well. Here is what he said:


" We have several Spektrum customers using the LRP Brushless System successfully. It's interesting that LRP doesn't think the BEC is an issue because when I talked with the guys at Associated (the LRP importers/distributors) they said they've been trying get LRP to change the BEC (up the current rate) for several years now. Anyway it's my understanding that the new LRP Brushless System has a higher capacity BEC that is working flawlessly with the Spektrum system. Let me know if you try it. "


this is very reassuring for those who plan on buying the LRP Sphere Brushless System (which includes me) but I also hope this Info helps those using LRP's QC2 and their other ESCs. The best solution would be to use the LRP Worlds Kit on your LRP ESCs to help take care of this low BEC issue that comes with them!

just a question: is it the fet servo's that generates the problem when used with the spektrum?
Would the problem be solved when I don't use the fet wire from my qc2 but go directly to my battery wire?

That is what my post was about pages ago but nobody seems to care , maybe capacitors have that fast look

You can do the same with standard servo's, just put generic silicon diodes in series with power lead on servo to drop the voltage to the voltage your servo requires (4.8 or 6v). Each diode is a 0.6V (~0.7V) drop so 3 would give you around a 1.8V drop from battery voltage.

Hey guys,

I already have the KO spektrum system...if I get an extra receiver - can I use it with the same module on my transmitter? Also does the receiver have to be KO specific? Thx.

Gary