kufman

iTrader: (6)

I made some measurements on my 1256 and even at full load it doesn't pull more than 3A. I think the real problem is companies can't make a BEC to save their lives. I know Castle can't since I already had their CC BEC destroy two servos and a receiver before I caught it putting out over 12V in an intermittent fashion. The BEC in the MMP is also very weak even when running on 2S input. Tekin's BEC starts out ok, but fails over time. One of my racing buddies could almost predict how long it would last. The LRP 5A BEC is weaker than other companies 3A BECs.

I do have to laugh when I open up most ESC and BEC units because it is obvious to me that they just quoted the number right off the data sheet for the part they used. Sure, the data sheet may say "3A" but it also says "at 25C junction temperature". When the ESC is running 60C(and thus the BEC junction temp is way over that number), guess what, that part isn't good for 3A anymore. Some linear voltage regulators, like the ones found in 2S and 3S ESC's, have thermal protection. Others do not. It reminds me of the brushed ESC days when companies would say that the ESC was good for 800A!! Again, that was just quoting the data sheet value for the FETs if the junction temperature was at 25C. It had nothing to do with reality.

fq06

iTrader: (12)

That's surprising that you only saw 3a. I'm assuming you set your end points way to far or something to get the stall amperage.

I guess even at 3a that is at the max advertised limit for most bec's and maxing out electronics is never good... and as you pointed out their 3a probably is not 3a.

And yeah, mosy bec's are crap unless you are running a servo that is not pulling very much amperage.

I have heard of what happened to your CC external bec before. I'm running it on the savox so hopefully it will burrn it up so I have an excuse to get another servo

kufman

iTrader: (6)

Yes, I held the front wheels and let the servo work against the spring on the servo saver. The reason the Savox servos cause problems for some BECs is because they have a very sharp rising edge on the current they draw. I have to assume this is due to the design of their coreless motors.

Venom1836

iTrader: (1)

Thanks so much guys!

I am sold on the DS1015.

With the LRP speedo, DS1015 and 25C 5000MAh lipo in my B4.1 I should not have BEC issues right? I really dont need to be making a wiring mess with capactitors, external BEC's, etc.

fq06

iTrader: (12)

I haven't heard anything negative about those and that's my next servo

RC*PHREAK

iTrader: (146)

agreed. i run a green servo in my SCTE. awesome servo. best i've used (futaba, savox, 1015).

doesn't have the same specs as what? there aren't too many out there that have the specs of the radiopost servos.

blue: Torque:

@ 4.8V: 111 oz in
@ 6.0V: 138 oz in
@ 7.4V: 165 oz in

Speed:

@ 4.8V: 0.06sec/60°
@ 6.0V: 0.05sec/60°
@ 7.4V: 0.04sec/60°

green: Torque:

@ 6.0V: 249 oz in
@ 7.4V: 305 oz in

Speed:

@ 6.0V: 0.08sec/60°
@ 7.4V: 0.07sec/60°

red: Torque:

@ 6.0V: 333 oz in
@ 7.4V: 419 oz in

Speed:

@ 6.0V: 0.10sec/60°
@ 7.4V: 0.09sec/60°


There's a reason they're rarely in stock...

mugenlife

iTrader: (4)

have ran savox SC-1258TG for past 2 years no issues at all same with associated ds1015s, futaba are generally slower but or very smooth have both a 350 and 351 out of my old mugen nitro buggy none of them have issues.

Jordan Anderson

iTrader: (6)

Not all the Savox servos pull too much current...

I use Savox 1267MG servos in both my 1/8 e-buggy and 4x4 SCT. Both are paired with Tekin RX8 ESCs and haven't had any issues. The 1267MG has a rated stall current of 3000mA @6V and the Tekin RX8 BEC is rated for 5000mA @ 6V.

However, I had the 1257TG paired with a Viper VTX10R ESC in my 2wd SCT and had BEC issues. The 1257TG has a rated stall current of 5000mA @ 6V. The Viper ESC should have been ok as it's BEC is rate 5000mA @7V.

I wouldn't even consider hooking the 1257TG up to my LRP SXX V2 TC because the LRP BEC is rated for 3000mA @ 6V...

Jordan Anderson

iTrader: (6)

You should be good! I use the 1015 servo with my LRP SXX V2 speedo. No issues.

Also, if you haven't heard already, you can send your LRP speedo in for an updated board (which has a stronger BEC) for free right now:

http://www.teamassociated.com/news/a...ck_Upgrade%21/

The original BEC in the LRP speedo is known to be somewhat hit and miss/weak. Updated board is good as long as you are not running 1/12th scale on 1S. On 2S for 1/10th scale, it should be better than the original.

Zerodefect

I won't use glitch busters and BEC's on my cars anymore.

If i have a power hungry setup I solder a female Rx plug to my main battery (2s) or Balencer leads (4s) to direct power my servos.

I use Hitec 79XX's so I don't need to. But my 5ive is soldered up for direct power to the servos, with one of the servo leads backfeeding the Rx.

Venom1836

iTrader: (1)

I am still trying to sell my other RC's to afford the LRP!

If I am not able to get my ESC before the free upgrade ends, what should I do?

Will I need the upgrade since I will be using the 1015 servo?

mugenlife

iTrader: (4)

Heck a novak pro sc can handle that in a 4x4 sc no bec no glitch buster.