HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Dec 30, 2010, 04:18 AM
most exalted one
United States, CA, Hemet
Joined Aug 2002
3,570 Posts
Discussion
9.6 nimh tx pack with three wires

A friend ordered a TX pack for Hitec Eclipse from a shop. He got a 3 wire pack with red/black/white leads. All I can find is a nimh pack that is wired for a thermostat to cutoff at 70 Celsius to protect the pack. Is this common?? Why would a shop provide a 3 wire pack??
4*60 is offline Find More Posts by 4*60
Reply With Quote
Sign up now
to remove ads between posts
Old Dec 30, 2010, 07:55 AM
Registered User
Staffs, UK
Joined Nov 2003
10,561 Posts
That's normally just because they used standard 3-wire servo cable (the connector is the same). The white wire is generally not connected to anything at the battery end.

Steve
slipstick is online now Find More Posts by slipstick
Reply With Quote
Old Dec 30, 2010, 10:56 AM
"Unnecessary Necessity"
coriolan's Avatar
Canada, BC, Vancouver
Joined Sep 2006
5,759 Posts
The Hitec Eclipse-7 doesn't use a servo type connector it the Tx (and will not accept one). This is the batterie connector for most modern Hitec Tx, it is polarized.
When I need packs for my radios I just order from :
http://www.batteriesamerica.com/newpage8.htm
Better price and they know their product!
coriolan is offline Find More Posts by coriolan
Reply With Quote
Old Dec 30, 2010, 03:14 PM
Registered User
Staffs, UK
Joined Nov 2003
10,561 Posts
Ah, forgot about that, I'm more used to the older Hitecs and Futabas.

So the normal reason why Tx batteries are supplied with 3-wire cables is because they use 3 pin servo-type connectors. But I have no idea why (or even how) they got 3 wires into a 2 pin connector .

Steve
slipstick is online now Find More Posts by slipstick
Reply With Quote
Old Dec 30, 2010, 03:54 PM
"Unnecessary Necessity"
coriolan's Avatar
Canada, BC, Vancouver
Joined Sep 2006
5,759 Posts
Quote:
Originally Posted by slipstick View Post
Ah, forgot about that, I'm more used to the older Hitecs and Futabas.

So the normal reason why Tx batteries are supplied with 3-wire cables is because they use 3 pin servo-type connectors. But I have no idea why (or even how) they got 3 wires into a 2 pin connector .

Steve
Older Futaba used a kind of similar plug, current Hitec uses the connector pictured. All modern Tx batteries have only two conductors even when they uses a servo-type plug (the signal wire is not soldered on the batterie side). The main problem with servo-type connectors is that it is possible to plug them in reverse if not carefull, even the Molex type Hitec can be pushed in the wrong way despite the key tab and fry the Tx (many treads about that in the Radio and DIY electronic forum )
coriolan is offline Find More Posts by coriolan
Reply With Quote
Old Dec 30, 2010, 03:58 PM
Registered User
pilotpete2's Avatar
The Northeast Kingdom, Vermont
Joined Jun 2004
5,244 Posts
They just used a bigger hammer I guess
I hear now and then, that some folks manage to force those plugs in bassakwards on the Hitecs. Gimme the standard servo plug for a battery connector in a transmitter any day
Pete
pilotpete2 is offline Find More Posts by pilotpete2
Reply With Quote
Old Dec 30, 2010, 05:00 PM
most exalted one
United States, CA, Hemet
Joined Aug 2002
3,570 Posts
I didn't have all the info but it probably is a black universal plug with one wire not connected.
I'm one of the guys who after many many times of plugging in finally plugged the Hitec plug in backwards and had to send an Eclipse in. Not as hard as it looks, especially when the brain isn't working!
4*60 is offline Find More Posts by 4*60
Last edited by 4*60; Dec 31, 2010 at 03:26 AM.
Reply With Quote
Old Dec 30, 2010, 10:49 PM
"Unnecessary Necessity"
coriolan's Avatar
Canada, BC, Vancouver
Joined Sep 2006
5,759 Posts
Agreed, I put some red marker on the + side of the batterie plug and Tx socket on all my Hitec radios for when I want to fast charge them with a peak charger..
coriolan is offline Find More Posts by coriolan
Reply With Quote
Old Dec 31, 2010, 12:25 AM
characters welcome!
Mark Wood's Avatar
United States, CA, Bear Valley Springs
Joined Feb 2000
26,418 Posts
Quote:
Originally Posted by coriolan View Post
The main problem with servo-type connectors is that it is possible to plug them in reverse if not carefull...
No damage would occur. The Tx just won't power up.

mw (2x 9C owner)
Mark Wood is offline Find More Posts by Mark Wood
Reply With Quote
Old Dec 31, 2010, 03:27 AM
most exalted one
United States, CA, Hemet
Joined Aug 2002
3,570 Posts
Quote:
Originally Posted by Mark Wood View Post
No damage would occur. The Tx just won't power up.

mw (2x 9C owner)
Absolutely! That would be the advantage!
4*60 is offline Find More Posts by 4*60
Reply With Quote
Old Dec 31, 2010, 11:05 AM
Registered User
pilotpete2's Avatar
The Northeast Kingdom, Vermont
Joined Jun 2004
5,244 Posts
My 9C and 8FG both have the negative and signal pin in the transmitter connected in common.
If you have a pack with a universal plug without the tab, just plug it in any old way, it don't care
Pete
pilotpete2 is offline Find More Posts by pilotpete2
Reply With Quote
Old Dec 31, 2010, 12:20 PM
"Unnecessary Necessity"
coriolan's Avatar
Canada, BC, Vancouver
Joined Sep 2006
5,759 Posts
That's the advantage or 3-pins connectors in that application or as servo connectors over a 2-pins set-up............Until you meet an older Airtronic plug with the center pin negative!
coriolan is offline Find More Posts by coriolan
Reply With Quote
Old Dec 31, 2010, 01:16 PM
Registered User
United States, NJ, Frenchtown
Joined Mar 2003
9,126 Posts
1 size fits all ?

We hope ?
cyclops2 is online now Find More Posts by cyclops2
Reply With Quote
Old Dec 31, 2010, 02:03 PM
Registered User
pilotpete2's Avatar
The Northeast Kingdom, Vermont
Joined Jun 2004
5,244 Posts
Psst. I have a great deal for the New Year. Five like new, hardly ever flown Airtronics receivers for the old style plugs. But wait there's more, they're negative shift Airtronics receivers, that I flew with a 9C.
Yeah, that old style ATX stuff burned up a servo or two. I really should take them to recycling
Happy new Year to All
Pete

Gorgeous day here, just came in from a great last flight of 2010!
pilotpete2 is offline Find More Posts by pilotpete2
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Help! Good NIMH 8-9-10 cell pack making company ? cyclops2 Batteries and Chargers 13 Oct 26, 2010 06:45 PM
For Sale 6-cell 7.2V 1200mah NiMH Battery $9 PerfectWeather Aircraft - Electric - Batteries & Chargers (FS/W) 0 Oct 15, 2010 10:48 PM
Discussion soldering help with TX/camera (sn555) wires mixed up? g3f0rc3 FPV Talk 3 Sep 30, 2010 05:44 AM
Discussion ESC with two wires - motor with three wires ? SpookiePower Power Systems 4 Apr 14, 2010 11:35 AM
FS: 1650mah 9.6V NIMH Square TX Pack PDX Slope Pilot Aircraft - Electric - Airplanes (FS/W) 7 Jun 07, 2004 12:32 AM