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-   -   CC BEC ,design flaw. (https://www.rc-monster.com/forum/showthread.php?t=14533)

glassdoctor 08.27.2008 06:20 AM

Hmmm...
I'm going to feel kinda guilty if any of my buddies has one take a dump and they lose $200 worth of rx/servo.

"Friends Don't Let Friends Use a CCBEC"

LOL!!!

Semi Pro 08.27.2008 09:07 AM

wow this post scares me, i thought that the 3 ccbec's i bought were helping keep my stuff safe not putting it at risk.

since i race and weight is very important whould i remove them all?

if a ccbec smokes my stuff what is castle going to do about it?

BrianG 08.27.2008 09:55 AM

Quote:

Originally Posted by kona (Post 205880)
You can increase the power handling of a zener by adding a power transistor. I think this is what what'snitro was saying except with a transistor. The transistor should be able to dissipate the power, but if you are afraid of melting wires, you could add a fuse. The nice thing about the zener shunt is that it is completely passive until needed.

http://i187.photobucket.com/albums/x...na_dog/ckt.jpg

Yup, that should work. Once the output voltage exceeds the zener voltage, there will be enough current flow through the resistor to bias the transistor, which will dump the voltage to ground, which will then blow the fuse.

What's_nitro? 08.27.2008 01:23 PM

Quote:

Originally Posted by kona (Post 205880)
I think this is what what'snitro was saying except with a transistor. The transistor should be able to dissipate the power, but if you are afraid of melting wires, you could add a fuse. The nice thing about the zener shunt is that it is completely passive until needed.

Yeah that was what I meant. Sorry, I was too lazy to draw up a schematic, upload it to photobucket, and post it here. :mdr: One small difference is that I would put the circuit across the power leads, but have it triggered from the output. Although you see full voltage either way, attaching it straight across the batteries (input) instead of the output of the BEC would allow for faster current rise and the fuse would blow sooner...

J3110 08.27.2008 04:01 PM

Quote:

Originally Posted by Sammus (Post 205864)
:lol: dont be.

j3110: you can give it away to me :P

I'm gonna hang onto it for a little while as a backup, but you definitely have dibs. :)

YogyBrushless 08.28.2008 12:28 AM

man i got three of them new, now u ppl scared me !!

hunter306 08.28.2008 01:16 AM

My first one smoked, and took a nice MG Race servo with it. Castle was cool and replaced the BEC free of charge, but that didn't save me any money when getting a new servo.

I sold my second CC-Bec and bought a no-name brand that seems to work well.

Sammus 08.28.2008 01:29 AM

Quote:

Originally Posted by hunter306 (Post 206232)
I sold my second CC-Bec and bought a no-name brand that seems to work well.

You really think a no-name brand bec will be better made that a castle one?

lutach 08.28.2008 01:47 AM

I love my RX packs :lol:.

hunter306 08.28.2008 01:55 AM

Quote:

Originally Posted by Sammus (Post 206234)
You really think a no-name brand bec will be better made that a castle one?

It's not a question of whether not 'I think' it will be better, I've used a couple of these cheapies from ebay with a lot of success. If it was just a random purchase, I wouldn't be able to say.

The only CC Bec I bought did exactly what the OP wrote in his complaint... It burned up (wired properly on 3s lipo) and took an expensive servo with it.

I love the cool stuff castle offers, and they serviced the BEC for free (replaced). But I feel obliged to share my experiences with others, especially in a thread where many are experiencing similar failures.


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