Quark on 6s
 

Wanting to replace the 9920, I've heard a few people saying that the Quark doesn't run on 6s very well.

Before I go into buying one, is this fixed in the new "125B" version? Can anyone shed some light with what problems they are getting?
http://www.rc-monster.com/proddetail...RK_125A&cat=21

AFAIK, both versions are 125B. I got mine shortly after Mike started listing them and mine says 125B and they have three white motor wires. However, the current ones I see have different colored "neon" motor wires, so I assume those are the "new" ones?

Either way, the ESC is listed as capable of 6s, so if it doesn't, you can get Quark/S&T support to replace or fix it.

My question is, if they "fix" it, does that solve the 6s problem?

i got one from mike last week and it was the one with the neon wires... i don't know if there is any difference between these the the ones with the white wires

abiye, do you have a 6s pack, so you can check it out?

Don't know, but as long as they keep spec'ing it at 6s, it's their problem until it is fixed. Brushless technology is bad enough with trying to get the rest of the vehicle strong enough to handle the power without having a manufacturer falsely rating their equipment. I'm not saying Quark/S&T is doing this, so don't get me wrong, I just feel that if it says it will run at 6s, then it should. Any ESC not able to do this should be returned and fixed/replaced as a warranty item.

IMO, this problem sounds like a firmware issue. Hopefully they updated it for the new version, along with any other possible bugs.

I talked to Frank at Quark just last week while I was checking on a repair I had sent in to them. I was asking about the ''new'' 125s that are showing up with the colored wires. He said that everything else except the wire color is identical to the white wired versions. Only reason that they have new wire colors is that some complained about not having different color wires so they switched to the colors vs all white. Nothing else changed. He also said next batch will have some more conventional colored wires on them, rather than the neon.

I also asked about the 6s issues and the heat issues and he acknowledged that there was room for improvement in both areas, but wouldn't call it a problem. They will support anyone having issues with getting there setup working properly.

I asked if they were going to''fix'' these problems and he said that they were not planning on making any revisions to this ESC. Instead he told me that they are planning a NEW CONTROLLER that is better designed for the 1/8 and MT applications. Reconfiguring, fixing the 6s issue and moving the heat sinks to the top like a more conventional ESC. All he could say was maybe next year as a time for the new esc.

Anyway, I thought that was some interesting news. He couldn't/woudn't give me any more info than that. As you might suspect I started asking alot of questions about this future ESC.


... I guess my point is, the 6s issue is no different with the neon wire versions vs the white wire versions.

Hmm, that decides it then. Thanks.

Hi,
I also consideration hot issues..
so i open my esc ,take look..
look like notthing to change i think..

i will change wire to 12AWG good wire. and use Thermal Adhesive to hold the pad and FET.

By the way . The CAP value is 330uF/35V low ESR Cap..Hope this help.

I fired a 80b on 6s from the problems. The new one didn't work any better.
They did have a good response time though. I think a mgm 24 160 would do nicely for you nick.

Looks like the best alternative.

Would I need a UBEC for MGM? It has built in LVC to?

mgm has built in lvc but need the ubec or receiver pack.

Here's a thought - the caps on the Quark are only rated at 35v. The caps on the 9920 are 50v caps. Does anyone think that might make a difference?

It might...But still, 6S isn't near that voltage...

Yeah, I know. What I've heard is that brushless ESCs used in car applications should have caps that are rated for about twice the voltage that will be going into the ESC. Obviously this isn't the case with the Mamba Max and 5s Lipo.