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Old Jan 17, 2012, 11:17 PM
They Call him Dead!
YellowJacketsRC's Avatar
United States, SC, Pawleys Island
Joined Jul 2003
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Thanks WoodCrafter. I see that if the charger is outputting 25.2 volts then it would require 415 watts at 16.5 amps and the charger is rated at 300 watts so there it is...

I think I am getting close to 11 amps while charging said lipo so at 25.2 volts that is 277 watts which is slighlty under what the charger says it can do when supplied 18 volts.

If I did give it 18 volts it would likely peak at 300 watts and give me a little high amp but not much.

I need a bigger charger
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Old Jan 17, 2012, 11:18 PM
VOLTS > AMPS
stgdz's Avatar
United States, MN, Buffalo
Joined Jul 2011
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Quote:
Originally Posted by marksextra View Post
That's a pretty sweet little chart. Thanks
this is the one that I always use
E is modulus of elasticity not volts, but I wanted to be the first to reply.


Also dead, time to step up to the big boys and get the 24v series supplies with a 1000watt charger. Isn't this hobby fun.
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Old Jan 17, 2012, 11:19 PM
RC Helicopter Pilot
TheWoodCrafter's Avatar
United States, CA, Westminster
Joined Mar 2010
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Quote:
Originally Posted by dead View Post
Seems to me that the specs say that it can run on as many as 28 volts DC. Which means I need to get a 24 volt power supply yes?
That would be a yes.

Quote:
It also says its maximum charge capacity is 300 watts at 18 volts. Which I believe means that I can charge at 16.6 amps?
[/quote]

The charger capacity is limited at 20 amps and 300 watts which ever comes first.
Depending on the voltage you are charge to will depend what your charging rate limit it. 3S versus 6S
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Old Jan 17, 2012, 11:25 PM
They Call him Dead!
YellowJacketsRC's Avatar
United States, SC, Pawleys Island
Joined Jul 2003
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Thanks so much for the help Fellas! Yes this hobby is fun! Yes I need a new 24 volt power supply and a brand new Icharger 306B

Any recomendations on best way to go about getting into a 24 volt power supply?
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Old Jan 17, 2012, 11:34 PM
RC Helicopter Pilot
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United States, CA, Westminster
Joined Mar 2010
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Buy surplus servers and convert or buy ready to use convert server supplies.

They are by far better than the commercially available PS on the market.
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Old Jan 17, 2012, 11:36 PM
They Call him Dead!
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United States, SC, Pawleys Island
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Check!
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Old Jan 17, 2012, 11:52 PM
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Seattle
Joined Sep 2007
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Quote:
Originally Posted by SkyRaptor View Post
Actually it's not a variable speed. Shorting pin 4 to ground reduces fan speed to minimum. When applying load, about over 4A or 5A amps, the fan rises speed to about 70% of full rpm, but it doesn't change with load.. Over that threshold, it keeps 70%.
I tried this today. Pin 4 to ground and fan speed slowed as advertised. However, running it for 20 minutes at 45 amps and the fan speed never ramped up. Oddly, the air coming out of the fan was same as ambient 67f. But the metal on other end, where the plug plugs in was 105f.

Does anybody know if the fan ramp up with pin 4 to ground is dependent on tempature? Perhaps the ambient air not hot enough to get the fan to kick in.
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Old Jan 18, 2012, 12:23 AM
AMA #535918
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Joined Apr 2006
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Quote:
Originally Posted by dead View Post
Thanks so much for the help Fellas! Yes this hobby is fun! Yes I need a new 24 volt power supply and a brand new Icharger 306B

Any recomendations on best way to go about getting into a 24 volt power supply?
Your batteries require - 16.5AMP to charge at 5C and that is 415watts.

Your power supply outputs up to 492 watts. 492 > 415

Using that power supply and a PowerLab 8, assuming 85% efficiency, you can charge a 6 cell at 16.6 amps.
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Old Jan 18, 2012, 08:26 AM
They Call him Dead!
YellowJacketsRC's Avatar
United States, SC, Pawleys Island
Joined Jul 2003
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Quote:
Originally Posted by vegasbs View Post
Your batteries require - 16.5AMP to charge at 5C and that is 415watts.

Your power supply outputs up to 492 watts. 492 > 415

Using that power supply and a PowerLab 8, assuming 85% efficiency, you can charge a 6 cell at 16.6 amps.
Yes!

But I was thinking of going with the Icharger 306B. What do you think of that?

http://www.progressiverc.com/icharger-306b.html
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Old Jan 18, 2012, 09:06 AM
VOLTS > AMPS
stgdz's Avatar
United States, MN, Buffalo
Joined Jul 2011
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Since you all ready use the 208 a 306 would be pretty easy to use as they have basically the same guide. A lot of people swear by the pl6&8 and you could parallel charge two 6s batteries with a 6pl6 as I think it can run at 32amps but I believe its 30amps.

There are lots of pus's out there look at the converting pc power supplies for more info and then look at ebay for the cheapest. There is a 600p dual on there for about 30bucks after shipping.
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Old Jan 18, 2012, 09:30 AM
RC Helicopter Pilot
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United States, CA, Westminster
Joined Mar 2010
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I bought mine at EP Buddy with a free paraboard.

http://epbuddy.com/index.php?main_pa...roducts_id=106

I don't think Progressive RC is beating that.
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Old Jan 18, 2012, 11:31 AM
They Call him Dead!
YellowJacketsRC's Avatar
United States, SC, Pawleys Island
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Quote:
Originally Posted by TheWoodCrafter View Post
I bought mine at EP Buddy with a free paraboard.

http://epbuddy.com/index.php?main_pa...roducts_id=106

I don't think Progressive RC is beating that.
yeah that is where I was gonna get it if I chose that one. Thanks
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Old Jan 18, 2012, 11:34 AM
They Call him Dead!
YellowJacketsRC's Avatar
United States, SC, Pawleys Island
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Quote:
Originally Posted by stgdz View Post
Since you all ready use the 208 a 306 would be pretty easy to use as they have basically the same guide. A lot of people swear by the pl6&8 and you could parallel charge two 6s batteries with a 6pl6 as I think it can run at 32amps but I believe its 30amps.

There are lots of pus's out there look at the converting pc power supplies for more info and then look at ebay for the cheapest. There is a 600p dual on there for about 30bucks after shipping.
I am very qualified and capable to the converting myself but don't know where to get one to convert. I live just south of Myrtle Beach, SC

Parallel charging two 6s 3300 lipos at 5c would be awesome! Maybe I should go that way??

But I do like the 206 Icharger I have (no complaints that is).
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Old Jan 18, 2012, 12:29 PM
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Canada, ON, Toronto
Joined Jun 2010
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I use this site for all my charger calculations...

http://scriptasylum.com/
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Old Jan 18, 2012, 01:07 PM
They Call him Dead!
YellowJacketsRC's Avatar
United States, SC, Pawleys Island
Joined Jul 2003
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Quote:
Originally Posted by GP73 View Post
I use this site for all my charger calculations...

http://scriptasylum.com/
Yet another AWESOME site. THANKS
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