Register Now

chris982 · 08-16-2012, 12:27 AM

Has anybody use a step down for their BLS251? If so, how did you configure your wiring? Was it neat or did it take up more space than planed?

CyprusFlyer · 08-16-2012, 01:46 AM

Advice is don't bother with a step down, do not use it myself and reports of others using for years at 5.6 -6v and no ill effects. Also rational is that fully charged batteries used of old reached those voltages anyway.

ChrisH · 08-16-2012, 01:53 AM

BLS251 are rated for 6V, use them at 6V.

Chris Sexton · 08-16-2012, 07:56 AM

I am running 3 of these at 5.6-6V no issues at all. As stated, they can handle 6v. The speed specs are for 4.8v but it's cool.

chris982 · 08-16-2012, 08:37 AM

I understand this but the specs say 4.8V. Wouldn't this cause a servo failure in the long run? I brought the step down but won't have any place to put it. So, I'm going without but don't want to crash the chopper. Why is it rated at 4.8V if it can do 6V?

jockstrap · 08-16-2012, 09:15 AM

It's to do with the 4.8V ratings referring to older nicad battery packs which, when fully charged were approx 6V rather than the nominal rated 4.8v ..

A bit like a car batt rated at 12v but is actually 13.8v

chris982 · 08-16-2012, 09:21 AM

Quote:

Originally Posted by jockstrap

It's to do with the 4.8V ratings referring to older nicad battery packs which, when fully charged were approx 6V rather than the nominal rated 4.8v ..

A bit like a car batt rated at 12v but is actually 13.8v

I think I can live with that.

TommyBear · 08-21-2012, 03:11 AM

Regardless of what people say. I would still use the step down diode on the BLS 251. I have been using BLS 251 on my TDR, T700 and Logo 600SE with step down.

geekindenial · 08-21-2012, 03:50 AM

I use the Align two way step down to step down from 6v. Cheap and works.

CyprusFlyer · 08-21-2012, 04:27 AM

Personal choice of course, but another point of failure in the way when the servo will run happily on 5.6 - 6v is not one for me.

DT75 · 08-21-2012, 04:43 AM

Quote:

Originally Posted by CyprusFlyer

Personal choice of course, but another point of failure in the way when the servo will run happily on 5.6 - 6v is not one for me.

+1.

chris982 · 08-21-2012, 04:44 AM

I just returned my step down to amainhobbies. I didn't see Jan using it per the manual.

ChrisH · 08-21-2012, 01:46 PM

Quote:

Originally Posted by TommyBear

Regardless of what people say. I would still use the step down diode on the BLS 251. I have been using BLS 251 on my TDR, T700 and Logo 600SE with step down.

It's not "what people say" ... it's what the manufacturer specs

http://www.mhm-modellbau.de/pdf/tech...rvos-robbe.pdf

chris982 · 08-21-2012, 09:38 PM

Quote:

Originally Posted by ChrisH

It's not "what people say" ... it's what the manufacturer specs

http://www.mhm-modellbau.de/pdf/tech...rvos-robbe.pdf

So, I need to reorder the the step down? I just don't see where I can put it on the TDR.

ChrisH · 08-21-2012, 11:29 PM

Quote:

Originally Posted by chris982

So, I need to reorder the the step down? I just don't see where I can put it on the TDR.

NO, the BLS251 is rated to 6V on that spec sheet from Robbe (Futaba Europe).

jhunter · 08-22-2012, 12:32 AM

I'll give you a step down if you want one but I have well over 100's of flights on bls 251's at 5.6 of the jive.

jointer · 08-22-2012, 07:55 AM

I had 700 flights with BLS251 at 6V from Jive - do not worry, it is working just fine.
(i must say, better then the Outrage i have now)

chris982 · 08-22-2012, 03:11 PM

Thanks! I should be getting my kit shipped next month.

08-16-2012, 12:27 AM	#1 (permalink)
chris982 Registered Users Join Date: Nov 2010	Voltage Step Down BLS251 Has anybody use a step down for their BLS251? If so, how did you configure your wiring? Was it neat or did it take up more space than planed?

08-16-2012, 01:46 AM	#2 (permalink)
CyprusFlyer Registered Users My HF Map location Join Date: Jan 2012	Advice is don't bother with a step down, do not use it myself and reports of others using for years at 5.6 -6v and no ill effects. Also rational is that fully charged batteries used of old reached those voltages anyway. __________________ LOGO 500SE & 600SE & 600SX Synergy E7 - N7 - N5C zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzTDR + II Alun

08-16-2012, 07:56 AM	#4 (permalink)
Chris Sexton Registered Users My HF Map location Join Date: Feb 2011	I am running 3 of these at 5.6-6V no issues at all. As stated, they can handle 6v. The speed specs are for 4.8v but it's cool. __________________ Synergy Factory Specialist / Rail Blades / Team Scorpion

08-16-2012, 09:15 AM	#6 (permalink)
jockstrap Registered Users Join Date: Dec 2006	It's to do with the 4.8V ratings referring to older nicad battery packs which, when fully charged were approx 6V rather than the nominal rated 4.8v .. A bit like a car batt rated at 12v but is actually 13.8v __________________ DX7 Mode-1 \| 450 pro 6s \| 450 pro \| Schweizer 300C Gasser Scale \| T-Rex550e \| Aeolus 50 \| HeliX T-Rex700 fbl Gasser \| HWC600 Gasser \| Henseleit MPXLe \| Henseleit 3DNT \| Suzi-Janis 700 \| Gaui NX4 \| Gaui X5 \| Blade 350QX

08-21-2012, 03:11 AM	#8 (permalink)
TommyBear HF MR Support Join Date: Nov 2011	Regardless of what people say. I would still use the step down diode on the BLS 251. I have been using BLS 251 on my TDR, T700 and Logo 600SE with step down. __________________ Lynh

08-16-2012, 01:53 AM	#3 (permalink)
ChrisH HF Support Join Date: Aug 2007	BLS251 are rated for 6V, use them at 6V.

08-16-2012, 08:37 AM	#5 (permalink)
chris982 Registered Users Thread Starter Join Date: Nov 2010	I understand this but the specs say 4.8V. Wouldn't this cause a servo failure in the long run? I brought the step down but won't have any place to put it. So, I'm going without but don't want to crash the chopper. Why is it rated at 4.8V if it can do 6V?

08-21-2012, 03:50 AM	#9 (permalink)
geekindenial Registered Users Join Date: Jan 2008	I use the Align two way step down to step down from 6v. Cheap and works.

08-21-2012, 04:27 AM	#10 (permalink)
CyprusFlyer Registered Users My HF Map location Join Date: Jan 2012	Personal choice of course, but another point of failure in the way when the servo will run happily on 5.6 - 6v is not one for me. __________________ LOGO 500SE & 600SE & 600SX Synergy E7 - N7 - N5C zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzTDR + II Alun

08-21-2012, 04:44 AM	#12 (permalink)
chris982 Registered Users Thread Starter Join Date: Nov 2010	I just returned my step down to amainhobbies. I didn't see Jan using it per the manual.

08-22-2012, 12:32 AM	#16 (permalink)
jhunter Registered Users Join Date: Oct 2009	I'll give you a step down if you want one but I have well over 100's of flights on bls 251's at 5.6 of the jive. __________________ TDR, Srimok N x 2, Banshee 31, Dune!

08-22-2012, 07:55 AM	#17 (permalink)
jointer Registered Users Join Date: Apr 2009	I had 700 flights with BLS251 at 6V from Jive - do not worry, it is working just fine. (i must say, better then the Outrage i have now) __________________ - TDSF in a box... - TDR #2, Scorpion 4525LE, PowerJive, MKS HBL950/980, Vbar - TDR #1 (stock, sold at 700+ flights), e-Revo, Protos 500, Jeti DS14

08-22-2012, 03:11 PM	#18 (permalink)
chris982 Registered Users Thread Starter Join Date: Nov 2010	Thanks! I should be getting my kit shipped next month.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Register Now

Log-in