Cheap "high voltage" esc Quest

[lutach]

Originally Posted by 1986camaro

http://cgi.ebay.com/ws/eBayISAPI.dll...MEWA:IT&ih=011

is this the same thing?

That guy is charging $20 big ones for shipping? He is trying to get rich quick I think.

[Takedown]

God, thats what I hate about some ebay ad's. They seem like an unbeleivable low price and then you look at the shipping price and its way to high. Pretty sad...

[rschoi_75]

At least ebay has introduced a new sorting function which allows you to sort based on price + shipping costs. So even if the seller tries to hide the shipping cost, it still affects his/her overall sale price.

[rschoi_75]

Bad news fellas. I think I smoked mine today.

I went to the park again today and got in about 5 minutes before it died on me. I most definitely thermalled the esc, because when I checked it, the heat shrink surrounding the esc was melted out of shape. I also lost power to my servo, which leads me to think the ubec is toast, but I need to check that one later tonight. I was running a 5s lipo and 16/48 on the gearing. It performed perfectly two days ago, and for almost 20 mins solid with no problems. So I don't know what went wrong today????

As far as the esc goes, I don't know what blew. Maybe a cap, but not sure since I don't know electronics. I'll take some pics of the damage later tonight or tomorrow, but I guess the MM is going back in the buggy now.

snellemin, did you get yours figured out?

[sikeston34m]

Originally Posted by rschoi_75

Bad news fellas. I think I smoked mine today.

I went to the park again today and got in about 5 minutes before it died on me. I most definitely thermalled the esc, because when I checked it, the heat shrink surrounding the esc was melted out of shape. I also lost power to my servo, which leads me to think the ubec is toast, but I need to check that one later tonight.

As far as the esc goes, I don't know what blew. Maybe a cap, but not sure since I don't know electronics. I'll take some pics of the damage later tonight or tomorrow, but I guess the MM is going back in the buggy now.

snellemin, did you get yours figured out?

Hi,

Check it out. You might get some "warranty" coverage but I doubt it.

If you can't get the seller to stand behind it, take some pics of the carnage and give me a good description. I might buy it from you if you give me a good deal.

I'm really curious about the construction of this ESC. I might be interested if the brain board is still good.

I wonder what happened to it? Hmmmmm......

[rschoi_75]

Hey Sike,

Thanks for the suggestion. I emailed the seller and will see what he says. Not a huge deal for me since I knew from the start it was a questionable purchase.

I am, however, very curious to know what went wrong. Here are some pics, but until I hear from the seller, I can't take any pics of the brainboard w/o the heat shrink. I know you can't see much with the heat shrink in place, but it may give the seller a reason to void my claim. If he says "no", then maybe I can send it to you to take a look at. I'll send you a pm with more details if I get shot down by the seller.

- Rich

[snellemin]

I haven't messed with mine yet. Kinda busy here at work now. Motherboards are getting reworked, so my ESC got to wait now. Modellfun did say that they would replace mine if I shipped it back to them.

[sikeston34m]

Originally Posted by rschoi_75

Hey Sike,

Thanks for the suggestion. I emailed the seller and will see what he says. Not a huge deal for me since I knew from the start it was a questionable purchase.

I am, however, very curious to know what went wrong. Here are some pics, but until I hear from the seller, I can't take any pics of the brainboard w/o the heat shrink. I know you can't see much with the heat shrink in place, but it may give the seller a reason to void my claim. If he says "no", then maybe I can send it to you to take a look at. I'll send you a pm with more details if I get shot down by the seller.

- Rich

I understand.

Is there any signs of melting heat shrink on the mount? (velcro side?)

It looks like some blown FET's from what I can tell. The power board went poof. Hmmmm...........

I like how these are laid out. The power board is nicely arranged. I was hoping these would kick butt. I've been watching them for awhile.

Thanks for the Pm, in advance. I appreciate that.

I would like to know what went wrong too.

[sikeston34m]

Are those Caps Bulging?

[rschoi_75]

Yeah, one is big time. I think it ruptured b/c there is some sticky liquid on top of the cap.

[sikeston34m]

I still think this could be a VERY good ESC with some mods.

It's pretty obvious it is lacking in the cap department. This means the powerboard is catching some pretty big spikes. Especially at the instant the caps fail.

I have some higher voltage FET's that I believe are the same size as the ones used on that power board. I'm very curious about this.

[sikeston34m]

Is the bottom melted? Not the heat sink side.......the other side.

[rschoi_75]

No, the bottom is fine and the motor lead side is fine. The only damage I can see with the heat shrink in place is the caps and the side of the powerboard where the heat shrink melted.

[torqeroll]

i have one for sale with the programer, if some one is interested ??? PM for price

Edited by Serum; prices only discussed by PM or email.

[torqeroll]

sorry, i didnt know