RunRyder RC
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1921 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › Transmitter - Okay to leave on ?
10-12-2005 01:42 AM  12 years agoPost 1
Amar

rrNovice

Chicago, IL

My Posts: All  Forum  Topic

Hi everyone,

Is it okay for me to leave my transmitter on to allow for the battery to discharge? Is there any harm in using the transmitter (IE. programming, etc.) without having the antenna deployed?

Thanks !
Amar

PM  EMAIL  Attn:RR  Quote
10-12-2005 01:50 AM  12 years agoPost 2
Yug

rrMaster

UK. Herts

My Posts: All  Forum  Topic

Pull the aerial out a segment or 2 so as to prevent the tx power output stage from being unloaded..
Assuming you are 9.6v, discharge to 8.4v, or leave tx on until it goes beep beep beep..
You only need to cycle your batteries every once in a while.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-12-2005 07:14 PM  12 years agoPost 3
darrens

rrKey Veteran

United Kingdom

My Posts: All  Forum  Topic

Depending on which tx you have, allowing it to totally drain could use all the back up power (seperate cell) and losing all of your model memories. Better to use a cycle charger to discharge/charge the pack.

He who dies with the most toys is the winner!

PM  EMAIL  GALLERY  Attn:RR  Quote
10-12-2005 07:27 PM  12 years agoPost 4
BarracudaHockey

rrMaster

Jacksonville FL

My Posts: All  Forum  Topic

If your sitting it on a shelf some where, extend the antenna all the way (a section or 2 is ok but more is better) and wait for the low voltage alarm. You won't hurt anything that way. Don't let it die.

Andy
AMA 77227
http://www.jaxrc.com

PM  EMAIL  GALLERY  Attn:RR  Quote
10-12-2005 08:27 PM  12 years agoPost 5
jackheli

rrProfessor

Vancouver - Canada

My Posts: All  Forum  Topic

every electronic component has and expected life (MTTF). The more you use it the sooner it will have the probability to fail. Even more so on high power output systems (like transmitters).

The right thing to do is to buy a charger with discharging capabilities built in.

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-12-2005 09:31 PM  12 years agoPost 6
BarracudaHockey

rrMaster

Jacksonville FL

My Posts: All  Forum  Topic

Yes thats true but its not what he asked, he asked if you could leave it on without the antenna, the answer is no, if he wants to go that route, he needs to extend the antenna.

Also some transmitters don't allow you to discharge through the jack without modification. But both the above posts are correct, if your going to cycle your nicads, the prefered method is a cycler.

Andy
AMA 77227
http://www.jaxrc.com

PM  EMAIL  GALLERY  Attn:RR  Quote
10-12-2005 09:38 PM  12 years agoPost 7
rotor- shark

rrVeteran

uk

My Posts: All  Forum  Topic

every transmitter i've ever come across will not allow discharging through the charging jack.the best way to do this is to plug a spare jack into the trainer socket(jr) and let it discharge without activating the transmit circuitry.even better still,just fly your simulator until the transmitter is flat

PM  EMAIL  Attn:RR  Quote
10-12-2005 10:21 PM  12 years agoPost 8
pH7

rrKey Veteran

Sterling Heights, MI - USA

My Posts: All  Forum  Topic

rotor- shark said:
every transmitter i've ever come across will not allow discharging through the charging jack
Well, I don't have a vast range of experience (owning only 1 transmitter, a Futaba 9C), but that is a very popular transmitter and it can be discharged through the jack.

Person, you said:
This implies that an antenna is already connected.... To answer your question. I do it all the time and dont notice anything.
Did you mean that you leave the transmitter on with the antenna completly collapsed? I have always avoided doing that because I have read many times here that this is a bad thing to do.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-12-2005 10:32 PM  12 years agoPost 9
tchavei

rrProfessor

Portugal

My Posts: All  Forum  Topic

The 9C and 14MZ can be discharged through the jack, Don't have the experience with others

Btw, on the 9C, if you connect a DSC cable it will turn itself on disabling transmitting capabilities so you can leave it on with the antenna fully closed without damaging the unit... its a bugger though if the alarm goes off at 5 am...

...dont ask me how I know!

Cheers

Tony


--------------------
"Perfection and patience usually walk side by side..."

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-12-2005 10:37 PM  12 years agoPost 10
Rafael23cc

rrKey Veteran

Junction City, KS

My Posts: All  Forum  Topic

Transmitting a signal for an extended period of time, will generate heat on the transmitter side of the electronics on your radio. If you do not extend the antenna for those extended _ON_ periods then your transmitter circuit may fry itself.

Set-up is a fairly short time when compared to the 5+ hours that is going to take for the transmitter to activate it's low voltage warning.

Always extend a few of the antenna segments so you have some energy dissipation (in the form of a transmitted signal).

Or get yourself a cycler and _remove_ the pack from the transmitter and cycle it _outside_ .

Rafael

Keep your feet on the ground, but your eyes on the sky.
Team Heliproz.com

PM  EMAIL  GALLERY  Attn:RR  Quote
10-12-2005 10:50 PM  12 years agoPost 11
webbhost

rrKey Veteran

england - Leicester

My Posts: All  Forum  Topic

take your TX Module out if possible. If not possible, id personally recommend discharging in 15 min intervals with 15 min rests. Just what i heard from a rc shop owner, so i stick by it. Afterall a flight isn't going to last much more than 15 mins, why keep your transmitter on after your engine has died

meh

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-13-2005 02:16 AM  12 years agoPost 12
E30TECH

rrVeteran

Jefferson, New Jersey

My Posts: All  Forum  Topic

I never knew that....
Transmitting a signal for an extended period of time, will generate heat on the transmitter side of the electronics on your radio. If you do not extend the antenna for those extended _ON_ periods then your transmitter circuit may fry itself.
Glad I read the thread

PM  EMAIL  GALLERY  Attn:RR  Quote
10-13-2005 02:15 PM  12 years agoPost 13
BarracudaHockey

rrMaster

Jacksonville FL

My Posts: All  Forum  Topic

Person,

If you have a 9C or something similar, turn it on and in about 5 or 6 minutes with the antenna collapsed and feel the RF module, that should tell you everything you need to know. If you have an internal crystal you'll have to take our word for it.

As for discharging through the jack: The newer transmitters did away with the diode and come with something called a poly switch, this is a factory authorized mod from Futaba that can be done by Radio South or Hobby services on any diode equipped transmitter. It acts as a self resetting fuse. It will allow low current discharge but if you get a shorted jack the poly switch will "blow" or open. Unlike a fuse this is thermal activated and will close and allow normal operation once it cools back down where a fuse would just blow and need to be replaced.

Andy
AMA 77227
http://www.jaxrc.com

PM  EMAIL  GALLERY  Attn:RR  Quote
10-13-2005 03:21 PM  12 years agoPost 14
BarracudaHockey

rrMaster

Jacksonville FL

My Posts: All  Forum  Topic

The whole RF section gets hot, I'm not into JR but if they have the RF module its the same way.

RF is energy and it has to be disappated somehow. Either its radiated through the antenna or it turns into heat.

Andy
AMA 77227
http://www.jaxrc.com

PM  EMAIL  GALLERY  Attn:RR  Quote
10-13-2005 05:33 PM  12 years agoPost 15
Rafael23cc

rrKey Veteran

Junction City, KS

My Posts: All  Forum  Topic

I have two JR radios.... The module will get hot, it might not be enough for you to feel it, but the internal components will be hot.

If you do not have a module: In almost any radio, the transmitting circuits are on the back of the radio near the base of the antenna (keep in mind that most antennas extend about 6 inches into the radio, measured from the top of the radio where the antenna comes out.) Feel that area after the tranmitter has been on for a while.

Rafael

Keep your feet on the ground, but your eyes on the sky.
Team Heliproz.com

PM  EMAIL  GALLERY  Attn:RR  Quote
10-28-2005 04:12 AM  12 years agoPost 16
spork

rrVeteran

Mountain View, CA

My Posts: All  Forum  Topic

Hey guys, I'm assuming that if I remove the RF module from my Futaba Super 7 I can leave it on without fear of damaging the radio (or transmitting for that matter). Is this true?

I'm planning on honing my skills while I'm stuck on a plane for 12 hours. I'm sure they won't want me transmitting, and I don't want to damage my radio.

Thanks for any info.

RC

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-28-2005 04:14 AM  12 years agoPost 17
BarracudaHockey

rrMaster

Jacksonville FL

My Posts: All  Forum  Topic

Yes its safe to remove your module.

Do they let you fly inside a plane? A micro would be cool for that.

Andy
AMA 77227
http://www.jaxrc.com

PM  EMAIL  GALLERY  Attn:RR  Quote
10-28-2005 04:59 AM  12 years agoPost 18
toejab

rrApprentice

Buffalo ,New York area

My Posts: All  Forum  Topic

i have a somewhat related question....within several days , i blew the fuse, twice in both my JR 10 s and my JR xf622.this was in the house while i was checking some things out. i was thinking that it had to do with the stock wall charger being plugged in while i turned the radios on and off or even more likely, when i unplugged the charger at the radio when the radio was on and the charger was plugged in....what do you all think? thanks larry

PM  EMAIL  GALLERY  Attn:RR  Quote
10-28-2005 05:52 AM  12 years agoPost 19
spork

rrVeteran

Mountain View, CA

My Posts: All  Forum  Topic

Do they let you fly inside a plane? A micro would be cool for that.
I guess I forgot to mention I was refering to a simulator. I've been out of the hobby for several years. I just got a T-Rex and downloaded the FMS sim. Now I'm all giddy

Thanks for the info.

RC

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-28-2005 07:04 AM  12 years agoPost 20
sed6

rrApprentice

OKC, OK

My Posts: All  Forum  Topic

Larry
I've done what you mention numerous times on my 9303 and others and never blew a fuse.

My guess is there is something fishy in the wiring in your home, you may have a ground crossed with a neutral wire somewhere. Older house I bet? I'm no electrician, and I'm kinda stabbing in the dark here, maybe someone else can chime in...


-------------------
-Scott D
T-Rex 600N
T-Rex 450SA

Practice at the field!

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1921 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › Transmitter - Okay to leave on ?
 Print TOPIC  Make Suggestion 

 10  Topic Subscribe

Tuesday, September 18 - 11:03 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online