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Radio Controler

Old 01-27-2007, 09:11 PM
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jsessums
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Default Radio Controler

I am a local R/C member in the Jackson area. I am new to the world of r/c and I am seeking some guidance on which way to go.
My problem is a radio setup that works great but the problem is that my second channel for steering is backwards. I turn the stick right the r/c turns left. I turn the stick left; the r/c goes right. I switched the positive and negative wire going to the servo and it didn’t work. You might be saying by now, smart one flip the steering switch on the controller. Well I’d love to but it doesn’t have a switch not even for the throttle. What is the probability of taking it apart to rewire the back of the cam and it actually work?
Old 01-27-2007, 09:26 PM
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Panzlflyer
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Default RE: Radio Controler

try the linkage arm on the other side if possible or turn the servo around if you absolutely dont have a reversing switch
Old 01-27-2007, 09:40 PM
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Default RE: Radio Controler

It would help a lot if we had some idea of what hte transmitter is, what the RC is and how it came to be like this. Did you install the electronics or did it come all built and ready to go?
Old 01-28-2007, 07:37 AM
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Rodney
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Default RE: Radio Controler

Switching the positive and negative leads on a servo is almost guaranteed to burn out the amplifier and has nothing to do with the direction of servo travel. To reverse a servo you must modify the innards by switching the two leads to the motor from the amplifier and interchange the two outside leads on the feedback potentiometer, a task difficult to do on modern servos with surface mount components. Different brands of servos travel in opposite directions. For instance Futaba and Hitec travel in opposite directions with the same servo input.
Old 01-28-2007, 04:32 PM
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jsessums
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Default RE: Radio Controler

It is a Kraft Radio and reciver. And I did not instal the electronics my self it was already together. This unit is old it was my dads and I naw have it.
Old 01-28-2007, 04:45 PM
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Default RE: Radio Controler

"To reverse a servo you must modify the innards by switching the two leads to the motor from the amplifier and interchange the two outside leads on the feedback potentiometer"

-I sorry I'm new to the hobby what does this mean
Old 01-28-2007, 06:04 PM
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Default RE: Radio Controler

There may be a reverse switch on the radio. Almost all modern 4 channel radios have servo reverse switches. Can't say wheter an old Craft would have this.
Old 01-28-2007, 07:34 PM
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Default RE: Radio Controler

Oh dear--
The problem with the steering is the least of the problem - -the type acceptance may be outdated to boot
the really older stuff had no switche - just trims -
the servos had removable pots so you could do the pot wires and motor wire swap and after recentering the pot -the servos worked -providing the pot was correctly installed.
If I was this guy -I would get some hands on help .
Old 01-28-2007, 09:55 PM
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Default RE: Radio Controler

I'd love some hands on help can you help me out. And by the way I did swich the pods and with this system it didn't work.

Not being Sarcastec just messing around
Old 01-29-2007, 01:08 AM
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davewallace
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Default RE: Radio Controler

jsessums,
You need to make sure that your radio is on surface frequency and not 72mhz which is for aircraft only. It also needs to be 1991 narrow band certified by the FCC. Older radios would have a gold or silver sticker on the back of the transmitter. Using a radio for the wrong purpose or using a radio that is not certifed makes you liable for a $10,000 fine and any insurance will not cover you for a resulting accident. New radios are real cheap now much easier to use.

Dave
Old 01-29-2007, 08:45 AM
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Default RE: Radio Controler

The key word here is KRAFT. Hasn't been made since the early 70's. Looks like you will have to buy a rew radio if you want to have reverse servo function. Sounds like you are trying to use a air radio for a car which is a big no-no. Dennis
Old 01-29-2007, 09:29 AM
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Default RE: Radio Controler

There is an extremely high probability that a radio that old is no longer FCC legal unless there is a gold sticker on it saying that it passed some kind of inspection for narrow band.

New radios are cheap, or even FREE!

This article is a little off subject, but net net is buy a new radio if you intend to fly. The cost is minimal compared to what you are going to have to go through with that one.

New or Used? What should you buy if you are on a tight budget?
by Ed Anderson
aeajr on the Forums


To put a plane in the air you will need servos, a receiver, some misc stuff
and of course, the transmitter. Let's see how the new packages shape up as
compared to buying a used transmitter and getting the servos and receiver and
crystal separately.

Just a few years ago, all radio packages were sold with standard servos and big
heavy receivers. One exception was the Hitec Flash 5SX which came with the
HS-81s and the Micro 555 receiver in what they called the glider package.
As a result this package became very popular with electric and glider pilots. The
radio makers finally caught on and have started packaging more systems with
micro servos and micro receivers. I am only looking at packages with micro
servos and receivers that can be used in parkflyers or gliders.

================
First, if you are planning to stay with small electrics/parkflyers, then go
for a Spektrum DX6. No channels pins to worry about, no channel conflict.
http://www.horizonhobby.com/Search/D...erm=DX6&CatId=

$199 or less - Let's see how much the radio costs if you were to buy the
parts separately.

4 micro servos - perfect for small electrics -- $15 each - $60
1 micro receiver, no crystal required ------------------- $55
Misc other stuff in the package ------------------------ $20

These are all things you will want for you small electrics $135

So the radio, rechargeable batteries, and charger = $64 - That's all!

=============================
Now if you don't want the DX 6 because it won't fly glow or large gliders
then look at one of these.

Futaba 6EXAS - $160
http://www2.towerhobbies.com/cgi-bi...I=LXJUV7**&P=ML

3 micro servos----------------------------------$15 each $45
1 micro receiver + crystal for small electrics -------- $70
Misc other stuff in the package ------------------------ $20

Total for components $135

Cost for radio, charger, battery = $25 for an 6 channel entry level computer
radio - WOW!
====================================
Maybe you like Airtronics better

Airtronics VG 6000 $170
http://www2.towerhobbies.com/cgi-bi...&I=LXEUY5**&P=7

2 micro servos ------------------------------- $15 each $30
1 Micro receiver + crystal ------------------------------ $65
1 Electronic Speed Control ----------------------------- $25
Misc stuff --------------------------------------------- $20

$140 for the above - you are going to need them anyway!

Radio, charger, battery = $30 for an entry level 6 channel computer radio.
REALLY!
===========================
Maybe you want a little more feature rich radio

Hitec Optic 6 - $220
http://www.hobby-lobby.com/hitec.htm

2 micro servos ----------------------------$15 each $30
Electron 6 micro receiver + crystal ( my favorite)---- $65
Misc other stuff in the package --------------------- $20

Total for components $115

Cost for radio, charger Battery = $105 Not bad for a midrange 6 channel
computer radio!

======================================

FREE RADIOS - COME AND GET 'EM!

You are trying to get started on very little budget and can live with
a basic 4 channel standard radio with limited feature set.

Hitec Laser 4 - $115
http://www2.towerhobbies.com/cgi-bin...I=LXANT6**&P=7

3 micro servos ------------------------------- $17 each $51
1 Micro receiver + crystal ------------------------------ $40
Switch harness ------------------------------------------ $10
Misc stuff ------------------------------------------------- $20

Total for components $121

Cost for radio, charger and battery = $0 FREE
Not bad for a basic 4 channel transmitter with Vtail and elevon mixing.
It also has ATV, servo reverse AND a trainer port! FREE!
==============================
Even lower budget?

You want to fly a 3 channel parkflyer or a 2-3
channel glider. You will definitely have to go used, right? Let's see.

Hitec Neon 3 channel FM radio, servos and receiver $59.99
http://www2.towerhobbies.com/cgi-bin...I=LXLGF4**&P=7

The package includes 2 HS-55 servos ----------$15 each = $30
Micro 05 receiver with crystal ------------------------------- = $40
Misc stuff in the package ------------------------------------- = $10

Contents of the package, if purchased separately - $80

Neon 3 ( uses regular batteries ) = FREE, and you saved $20 on the rest of
the stuff! You can buy the contents and throw the transmitter away!!!!

=================================================
Now, you can argue $5 or $10 either way with my analysis, but it won't
change much. If you are looking for an entry level 6 channel computer
radio, these packages are a great value, and perhaps even better than used
prices. Each of these packages includes at least 1 year warranty and you
don't have to worry what someone else did to it. Try to buy a
comparable transmitter, used, for less than this.

Any questions?
Old 01-29-2007, 10:27 AM
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rmh
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Default RE: Radio Controler

Tho some may not agree- This fellow's inquiry is a typical example of why I jumped to DX7 radio
Before that however, I used 53.xx exclusively -(KA7PON) simply because so many older pieces of equipment are floating about and it has become a crapshoot to use 72:xx.
This is not idle chatter - I have encounterd exactly this at our field in past yeras
Typical example is - dad's old radio plus new RTF model -
also Dad's old radio plus a rc car (most common.) some got unhappy and went away mad that their setup was not acceptable -even tho they realized "why"
some just went away-- (looking for another place -they WERE going to use it ).
Years back we shut down a local "hero" who decided Ham radio license stuff was not enforceable .he got a personal visit at his home from the Federal Inspector.
One last shot
If flyers at the field do not clamp down on every single example of improper use of frequencies - everything turns to sh-t-in a heatbeat.
Old 01-29-2007, 02:36 PM
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Default RE: Radio Controler

ORIGINAL: dick Hanson
If flyers at the field do not clamp down on every single example of improper use of frequencies - everything turns to sh-t-in a heatbeat.
Thank You Dick, I couldn't agree more
Pete
Old 01-29-2007, 03:04 PM
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Default RE: Radio Controler

When KRAFT first came out it did'nt have servo reversing. It was a pricey radio for it's time. Some of their six channel could go over $700. But they were made for air. If you look on his profile he says car. so in Brandon, MS there is a old Air radio being used for a car and if it close to a RC field somebody is going to loss a plane and not know why? Either he got on E-bay because someone had it and put in the car to sell it, or it was sitting around and he didn't know the difference. That's why 2.4 gig is going to save planes. Dennis
Old 01-29-2007, 11:01 PM
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jsessums
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Default RE: Radio Controler

Ok So What does it matter

It was in my dads shed and I thaought hey do somehing diferent since you have LED lights had you could turn on with a radio in stead of a switch on the RC

But I had another poblem worst than LED's
the servo
and I was Hoping You could help me out
Old 01-29-2007, 11:58 PM
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Default RE: Radio Controler


ORIGINAL: dick Hanson
........Before that however, I used 53.xx exclusively -(KA7PON)...........
There were two old f@rts at our field years ago with about 10,000 years rc experience between them. Both on 53.1
One managed to shoot the other down.
Old 01-30-2007, 06:48 AM
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Default RE: Radio Controler


ORIGINAL: jsessums

Ok So What does it matter

It was in my dads shed and I thaought hey do somehing diferent since you have LED lights had you could turn on with a radio in stead of a switch on the RC

But I had another poblem worst than LED's
the servo
and I was Hoping You could help me out
Unless you are a collector of old equipment, it probably isn't worth fussing with the old radio. The new stuff is so cheap and so good you are better off with new.

Someone will want to buy that old set-up from you to fix their only set-up or as a collector.
Old 01-30-2007, 10:37 AM
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Default RE: Radio Controler

Jsessums, it matters a lot to those that fly. You are using a radio that could cause a crash of a plane in the $10,000 range and possiblity of hurting some one. Thats why they sell car radio's on a different channell. That radio is wide band and could up set a lot of planes within a two mile range. Please stop using it and buy something for cars. You can get one for as low as $65. Go on E-bay and pay $25. Help the flyers protect their planes. Dennis
Old 01-30-2007, 02:29 PM
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Default RE: Radio Controler

Oh, he is using a car? I missed that. Cars need to be on 75 MHz.
Old 01-30-2007, 07:12 PM
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Default RE: Radio Controler

Ok I understand what you guys are saying
But so I can understand a little more how would this couse me to have a plane crash with this radio
I hough you had to have a tainer on you radio in order to even conrole an RC/aircraft.
Old 01-30-2007, 11:13 PM
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Default RE: Radio Controler

If you are on 72 MHz and I am on 72 MHZ then we are on the same frequency band.

Within that band they sub divide it into channels. Today those are narrow band channels 11-60.

If you and I are on the same channel, then we both crash because our receivers can't tell which signals to follow.

Since your radio is wide band, it potentially spans several of the narrow band channels. That means you could bring down several planes at once. Not Good!

I hope that explains it.
Old 01-31-2007, 09:22 AM
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Default RE: Radio Controler

These radio's have a two mile range. You could cause a plane to go down and not even know it. With the radio of that age it would bleed over on severall channels. When these radios where new they bleed two or three channels each way. At this age there is no telling how out of tune it is. I hope this answers your questions. Dennis
Old 01-31-2007, 09:33 AM
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Default RE: Radio Controler

There are commercial users between our present narrow 72MHz band channels, you will interfere with those users with that old radio (you have no way of knowing if there is a licenced commercial user in your area) if you do interfere with one, you WILL have a visit from an FCC field official, hopefully with only a warning.
Pete
Old 01-31-2007, 07:28 PM
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jsessums
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Default RE: Radio Controler

Thanks Guys
I have onother post about speed contolers in the car, truck, and buggy section of the foums but have not been able to get any one to respond
But you guys have been geat thanks

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