Spektrum reciever brown-outs, any other option other than caps?
03-22-2012, 05:08 PM
#1
Spektrum reciever brown-outs, any other option other than caps?
I run Spektrum sr3500 recievers, Tekin RS and I'm trying to run a savox servo.
As long as I use a servo other than the savox everything is happy. With the Savox I can't even run for 30 seconds before it browns out and reboots the ESC.
I've tried one cap, two caps, one huge cap, two huge caps and nothing.
At idle this thing browns out my reciever.
Is there anything out there to fix this, other than a BEC?
Looks like I'm going to have to spend a lot of money on a hitec 7940
Savox servos I've tried are sc1257tg and sc1267sg
I'm not ditching the spektrum or the Tekin for other reasons.
In all fairness, if I do ditch the Tekin ESC for a speedpassion I don't have issues.
As long as I use a servo other than the savox everything is happy. With the Savox I can't even run for 30 seconds before it browns out and reboots the ESC.
I've tried one cap, two caps, one huge cap, two huge caps and nothing.
At idle this thing browns out my reciever.
Is there anything out there to fix this, other than a BEC?
Looks like I'm going to have to spend a lot of money on a hitec 7940
Savox servos I've tried are sc1257tg and sc1267sg
I'm not ditching the spektrum or the Tekin for other reasons.
In all fairness, if I do ditch the Tekin ESC for a speedpassion I don't have issues.
03-22-2012, 05:54 PM
#2
Tech Master
If your Savox servo is a high voltage servo, you can use our 7.4V adjuster.
This will bypass getting power from your receiver and use the voltage from your 2S Lipo to power your servo.
You have to disconnect your battery to turn off the servo and can only be used with high voltage servos. You can see images of the harness and how it hooks up here. This goes in between your servo lead and the receiver so it is reversible and you don't have to hack up your servo lead.
This will bypass getting power from your receiver and use the voltage from your 2S Lipo to power your servo.
You have to disconnect your battery to turn off the servo and can only be used with high voltage servos. You can see images of the harness and how it hooks up here. This goes in between your servo lead and the receiver so it is reversible and you don't have to hack up your servo lead.
03-23-2012, 07:06 AM
#4
I think KO (above) would agree but just buy a KO radio or even an Airtronics. For real there both super reliable high quality and you don't get any short outs ever. I did have to use 1 cap with futaba fasst but none with AIR or KO... Sell the Spektrum 
03-23-2012, 08:55 PM
#8
If your Savox servo is a high voltage servo, you can use our 7.4V adjuster.
This will bypass getting power from your receiver and use the voltage from your 2S Lipo to power your servo.
You have to disconnect your battery to turn off the servo and can only be used with high voltage servos. You can see images of the harness and how it hooks up here. This goes in between your servo lead and the receiver so it is reversible and you don't have to hack up your servo lead.
This will bypass getting power from your receiver and use the voltage from your 2S Lipo to power your servo.
You have to disconnect your battery to turn off the servo and can only be used with high voltage servos. You can see images of the harness and how it hooks up here. This goes in between your servo lead and the receiver so it is reversible and you don't have to hack up your servo lead.
03-24-2012, 08:24 AM
#11
I'm going to go to the hobby store and make an adapter like KOsupport posted out of a servo extension and try that.
I'll report back with results.
I've got a couple reasons I don't want to ditch the savox servo.
#1 would be cost, the comparable hitec I'd want is $150 new. (vs $90 for the savox)
#2 is HRP is local to me, so warranty is cake and no-hassle.
I'll report back with results.
I've got a couple reasons I don't want to ditch the savox servo.
#1 would be cost, the comparable hitec I'd want is $150 new. (vs $90 for the savox)
#2 is HRP is local to me, so warranty is cake and no-hassle.
03-24-2012, 06:02 PM
#12
I made a harness as per the KO harness.
Everything works fine except the servo twitches very badly under braking, almost uncontrollable. I tried putting a cap on the servo supply and found that it still does it. Looks like I can't run the savox servos, afterall.
Everything works fine except the servo twitches very badly under braking, almost uncontrollable. I tried putting a cap on the servo supply and found that it still does it. Looks like I can't run the savox servos, afterall.
08-11-2012, 05:24 AM
#14
I thought you said a cap did not work? If it does not your problem is the Tekin has a faulty BEC. I and many others have had the same problem with RX8. Only option is send it in for repair or get an external BEC.
09-21-2012, 06:00 PM
#15
servo/rec brown out
There's an indepth article about these issue's in the AMA monthly. One of the Helio guys got tired of his 600 coming out of the air. I've had issues with JR 9100s and Tekin RSpro, I've gone too an external bec and it's real quick, stable and glitch free. This is a cheap insureance policy for not burning the on board BEC as I burnt my older RSpro up because the servo's were running are pulling 5-7 amps to stop and start. Since the esc is only designed to provide 3amps, were shorting the main board in the esc. It gets real pricey and real agravating as I broke the truck too. Chris