Could not wait so I got professional help( Nandakumar ) for converting my Futaba Tx to dual frequency 72Mhz + 2.4G using a Assan X8D module also known as hack Module .
Here are a few Photos .
It works like a breeze I have Video but due to software issues I am grappling with resolving them.
The Module price Rs 4450/- + receiver Rs 1800/- .
Sai
Congrats!.. Now you have stepped into the world of total freedom and choice.
Congrats Mr. Sai............
please do give us a flight report :)
sahil
Sure will .
It looks good as of now .
Lets see on saturday by when I guess you can have a report from Hyderabad itself.
2 hacks being tested this week end I guess.
sai
Pls. also post a total cost of the combo, if you intend to make a combo of this. Looks a good buy anyway.
great stuff...can't wait for the weekend review.. am sure it will work gr8.. congrats mr.sai
A question to the senior people in here..
Thank god we have these modules which can convert your mhz tx to 2.4ghz for very very less price compared to the original 2.4ghz..
So my question is, does tat mean the people who fit these modules in their tx have less features compared to the original tx also i saw a hack modules which are 8ch so can we fit these modules on our 6ch tx ?? ;D stupid question..
I think mr.sai would knw better since he is the only indian guy who has done this kind of conversion as far as i knw...kudos..
atul g.
Atul ,
Ashta has also done this in Bangalore as far as I know and so has Ismail in UK.
The Module is good for transmitters up to 8 channel .
In the wiring you are only adding a Module into your tx along with the existing FM circuit hence logically it should not affect other functions of the Tx because you are only changing the carrier waves not to the basic electronics of the Tx , I might be wrong but other experts like Ismail ,Saju etc. can better answer your clarifications.
BTW I checked up and found that any transmitter that has a PPM board can be fitted with this so old AM tx's can also be reused.
Sai
Is it a full range receiver???
Also what 2.4Ghz technology is it using.
it says 300 - 800 m but will check the range on Sunday and revert.
this is a trial so got to see how it works.
sai
Ok also another question you need to use different type of modules for different radios??
This is for non module tx
sai
X8 Series 2.4GHz Transmission Module
Model
Description
Compatible models
X8F
Updates the conventional FUTABA/ HITEC/WFLY transmitter
FUTABA: 3PM,3PK, 7U, 8U, 8J, 9C , 9Z, and FN series.
HITEC: Optic 6, Eclipse 7.
WFLY: WFT09
X8J
Updates the conventional JR transmitter
347,388,783,U8,PCM10,PCM10S,PCM10SX,PCM10IIs,8103,9303,
X8S
Updates the conventional SANWA transmitter
SANWA M8/M11
X8K
Updates the conventional KO PROPO transmitter
KO PROPO EX-10
X8U
Updates most of the conventional transmitters with training access
Transmitter with training access , such as FUTABA EX transmitter series.
X8D
Remodels the conventional transmitter by user
Transmitter with separate transmission module, such as EVO transmitter series.
This is from the ASSAN Site.
That is good info I was mainly focusing on the hack module because that is what I have bought .
Lets see how it works will keep you guys posted.
Will know this week end when I test it out .
As they say the proof of the pudding is in the eating , there might be many reports but what applies to you is what is important.
sai
Now you can convert any PPM transmitter to 2.4Ghz with the new X8D X8-Hack module!
Provided your transmitter has an inbuilt PPM board (99% of radios do), all you will need to do is solder 3 wires, insert the X8 unit and plug in the antenna!
My personal view is i never want to open the radio and fiddle with electronics.
I am using the X8F module for my 9Z transmitter. Works like a charm. However, I am not sure how to do a range check. Normally, in 2.4GHz tx you have a low power mode.. you do range check in that mode. But in our converted TX, we do not have a method to set it to low power mode. I just made sure that I can control the model from the other side of the field and it worked.
Quote from: atul_pg on August 06, 2009, 09:26:20 PM
So my question is, does tat mean the people who fit these modules in their tx have less features compared to the original tx also i saw a hack modules which are 8ch so can we fit these modules on our 6ch tx ?? ;D stupid question..
Yes Atul, the 8 ch module with fit for any TX with less than or equal to 8 channels. Only requirement is that your TX should be PPM type (it can be either AM or FM).
Imagine it as a train having 8 carriages... each carriages carry your control information to your receiver.. If you have only 4 controls then the last 4 carriages will be empty.. thatz it.
BTW, you will have all the features that your current TX offers.. its just to transmission endpoint that you have changed. I do not think a normal or even a reasonably advanced pilot would require all the features of the high end TX... Most 6 to 8 ch Comp TX will fit the bill.
-Ismail
Hi izmile,
what receiver are you using??? just curious
@ Sai, Is it a 8Channel receiver???
I picked up the X8F combo pack
http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=8286
Comes with a 6 ch and a 7 ch receiver.
Looks like these X8 modules are selling like hot cakes.. You have to wait until you get the next stock in. Just a few weeks before it was like +152 units now its -42!!
-Ismail
Why is there a voltage protector separately and the binding plug separately.
Quote from: rckatty on August 07, 2009, 07:39:27 AM
Why is there a voltage protector separately and the binding plug separately.
i have used a 2.4ghz earlier, not sure of the voltage protector but the bind plug is used to link the rx and tx and is a mandatory process for all 2.4ghz tx..after the rx is linked with the tx the bind plug can be removed and put away..its simply a process to link the master and slave..no need to link it again if you save the settings on your tx..
Quote from: izmile on August 06, 2009, 11:35:46 PM
I picked up the X8F combo pack
http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=8286
Comes with a 6 ch and a 7 ch receiver.
Looks like these X8 modules are selling like hot cakes.. You have to wait until you get the next stock in. Just a few weeks before it was like +152 units now its -42!!
-Ismail
Hi ismail, thanks for answering my question..
Did you have to pay any custom duty ? Did you order this in the uk or india ? looks like a nice deal..
cheers
atul g.
Quote from: atul_pg on August 07, 2009, 08:20:13 AM
i have used a 2.4ghz earlier, not sure of the voltage protector but the bind plug is used to link the rx and tx and is a mandatory process for all 2.4ghz tx..after the rx is linked with the tx the bind plug can be removed and put away..its simply a process to link the master and slave..no need to link it again if you save the settings on your tx..
Nope. For Futaba FASST/2.4, all you need is to press a small button on the RX for a few seconds. No need for bind plugs, and no need for the tricks one has to play with a servo extension when a bind-plug is not available when needed.
Atul i do know why bind plugs are used. my question was why is it separate. Also the voltage regulator is it for rx. So does the rx have problems as it requires a external voltage regulator.
Quote from: anwar on August 07, 2009, 08:29:21 AM
No need for bind plugs, and no need for the tricks one has to play with a servo extension when a bind-plug is not available when needed.
Yes agree with Anwar on this go in for a reputed brand like Jr/Spektrum/Futaba/Airtronics/Hitec
RCKatty - I was only responding to the bind plug requirement.
But since you brought up the issue of a hack versus going for genuine 2.4 radio, here are my observations.
1) Many people may not have the skill/guts to do it. So someone like Sai doing them before shipping to a new buyer may work.
2) You lose any sort of warranty by the radio manufacturer. But then who really sends radios back to manufacturers these days ?
It looks like if you radio is already like a year old or so, this is a good trick (assuming you can manage to do it cleanly, without dripping solder on the rest of the components etc ;) )
Atul ,
Be careful in what you pick the Module Ismail has is for Module based Transmitters.
What is needed for the 6 exa is the hack Module.
Katty /Anwar ,
We are the budget oriented players of the RC Segment we are not talking big time so we can live without a few features like pressing a button on the tx etc and using a bind plug a manual method instead .
The conversion was not really that complicated all we are trying to do here is to look at affordable 2.4 G options for those who do not want to nor afford to buy expensive 2,4 G options .
Those who can afford or want JR , SPEKTRUM , Air tronics , FUTABA etc are not persons this thread is aimed at in the first place .
So guy's this sort of a thread is for JANATA CLASS aero modelers not for Air travel type's and largely to DIY types ( build and fly ) not buy and fly types . We are willing to put in a little extra effort ( AKA manual labour ) to achieve what we want ie best bang for the buck in our opinion .
BTW the Capacitor or the Voltage regulator is a simple device included in the event of a rx voltage drop , it is a kind of backup again a Janata class solution . May be you could also adopt it on your super brands
We buy second hand radio's , reuse radios junked by others , pull out junked stuff and try to use every small thing we have to the maximum , this is our psych , we make models out of advt board and scrap , well guy this is the class of aero modelers that ASSAN is meant for , guys we are not in your league at all .
Please keep this in mind when analyzing what we do and our world is a different world , I know some of the things we do might seem funny to you but its just like some of the things you guys do look funny to us .
There are as many of us funny types now a days even in forums like RCG as your types .
Sai
Quote from: rcforall on August 07, 2009, 09:49:42 AM
Katty /Anwar ,
We are the budget oriented players of the RC Segment we are not talking big time so we can live without a few features like pressing a button on the tx etc and using a bind plug a manual method instead .
The conversion was not really that complicated all we are trying to do here is to look at affordable 2.4 G options for those who do not want to nor afford to buy expensive 2,4 G options .
Sai
Sai -I think something is catching up to you ;) I am not sure why you added my name to this response. On the other hand, I can see why you added Katty, as he directly suggested going for a branded radio.
If you really read what I wrote, you will realize that all I did is to support this, with the required caution. And that caution involves two things.
1) Don't do it if you are not the DIY type. And if you are the non-DIY type, get it done with someone who can handle opening up of radios and soldering on existing PCBs.
2) If you care about your manufacturer warranty, don't do it immediately. Wait for at least the initial warranty to pass.
Now which part do you disagree with ? Your comments suggest that others may look down on people who are doing this hack, while it is quite the contrary ! If a few people test this and prove this, that will allow 2.4 (yay.. ;D ) to be accessible to even more people, who do not want to invest in a new radio ! {:)}
Time to send you some Valium ;D ;D
Anwar ,
Sorry I added your name out of habit considering the past few days of our forum activity . ;) ;D ;D
Deleted now.
Only Katty then.
sai
Hi Sai,
Can you please confirm if the items have been shipped... please let me know the docket number asap. Cant wait for the module... so excited to get it converted :)
Thanks.
Saurabh
I have also made out schematic diagram will e mail it to you and post it here soon.
The Module is shipped with special instructions for today's delivery will get back to you POD in around 1/2 hour.
Sai
Quote from: rcforall on August 07, 2009, 10:17:38 AM
I have also made out schematic diagram will e mail it to you and post it here soon.
The Module is shipped with special instructions for today's delivery will get back to you POD in around 1/2 hour.
Sai
Thanks Sai !!
Would be a good idea if you could also post the video here that you were mentioning yest. It will be a great help for the people who are new / want to convert their Tx into Ghz.
I will be creating a new thread for the conversion with pics once I do the conversion. :) hope this will help all :)
Waiting to hear from you on the docet. !!!
Cheers !!!
Saurabh
Here is the schematic of the conversion .
It is actually quite simple to understand :
1) Create an additional negative connection from the Main board of the Tx to the 2.4 G
2) Cut the Positive and the Modulation signal wires going to the existing Mhz RF Board and route it thru a 6 pole switch to each of the modules .
There you have the Dual Band switchable Tx.
Rgds
Sai
Quote from: atul_pg on August 07, 2009, 08:20:13 AM
Did you have to pay any custom duty ? Did you order this in the uk or india ? looks like a nice deal..
Bought it from the UK. No customs charged. As Sai said the one that I bought is for module based TX for your's hack module would fit. I feel hack module is better as you have a convinient switch to change between bands. In module based radios you need to physically change the module to change bands.
Quote from: rckatty on August 07, 2009, 08:34:39 AM
Also the voltage regulator is it for rx. So does the rx have problems as it requires a external voltage regulator.
I am not sure what you mean by voltage regulator. I assume you are talking about the fat capacitor (orange one). That is used for providing additional power when there is a sudden demand of power from the receiver. You can get those from most electronics spares shop for less than Rs 50.
Looking at the pervious posts (and from other forums) its seems that, this hobby has become more of a buyer and flyer kind of thing... very few wants to experiment. In fact, I do not see a difference between a kid playing with a toy and we playing with our airplanes/helis... This hobby has so much to offer in terms of learning - right from chemistry, physics till aerodynamics... Again its a personal choice and is up to the buyer/flyer/builder to determine what he needs (depending on his appetite for learning and his budget.)
Whatz the fun if you have everything provided on your table!
This in interesting thread that gives details of many types and makes of transmitters that have been converted using Assan Hack Module :
http://www.rcgroups.com/forums/showthread.php?t=994433
Very interesting to read . You will find every known brand of radio like JR , Futaba , Futaba Robbe , Graupner , Multiplex , Futaba 7CP2.4G :o have been converted using Assan hack .
Here is the use of a capacitor for receiver voltage protection
http://www.rcgroups.com/forums/showthread.php?t=1086982
Frankly this kind of went quite fast over my head ;D
Thank Saju for this info he dug it out .
Sai
Hi Sai,
Did you get to speak to the courier guy ??? Still did not get the package ...
Thanks
Saurabh
Hi Saurabh ,
These are 1 to 1 matters which are not of any interest to anyone else on the forum .
So I would prefer one to one communication by other channels either PM or SMS or E mail.
I will send you a PM on this .
Sai
Quote from: rcforall on August 07, 2009, 06:15:30 PM
Hi Saurabh ,
These are 1 to 1 matters which are not of any interest to anyone else on the forum .
So I would prefer one to one communication by other channels either PM or SMS or E mail.
I will send you a PM on this .
Sai
Sure thanks :)
Quote from: izmile on August 07, 2009, 12:05:39 PM
Whatz the fun if you have everything provided on your table!
Not quite the right analogy :P
One may look at it as Phase 1: collecting the ingredients and cleaning them, and cutting them in the right shapes and sizes and Phase 2: Cooking them with some amount of skill. Some people (the "buy and fly" type) want to do only Phase 2. Sure that also takes skill, and one can spend a life time just doing that and perfecting that. Others want to spend time in Phase 1, having fun finding alternate ingredients, making sure everything is cut to perfect size etc.
It is not fair equating "flying" to just "eating what has already been cooked". Plain eating requires little or no skill ;P
Good morning ,
Hello mr.sai i was just wondering if you tested the new hack module ? How was the range approximately ? Any problem with the module ?
kindly let us knw ...
cheers
atul g.
Awesome (:|~ (:|~ {:)} {:)}
I will give a report later If Saju does not do so by tomorrow evening ;) ;D
Guys just returned from flying 1/2 hour back so any more of RC talk and I could land up with a civil war at Home so report will have to wait .
I would prefer Saju tells his observations as he was also there.
Flew the Multiplex Easy Cub and Maidened the Multiplex FOX on Assan 2.4 G .
sai
Hi Guys,
I got my Hack module from Sai today. Even I have converted my 72 Mhz Futaba 6EXAP into a Ghz tx. Works great so far. Have not tried on the field as got it done today only. I have also prepared a DETAILED review and guide with pics on how to convert the system. Could not post it as the pics are heavy and only 4 are allowed per post. Also, I have made a pdf doc for the same.
If anyone needs it please PM me, I will mail you on your mail. Its step by step guide with pics... :) hope you will find it useful. ;D 8)
Cheers!!!
Saurabh.
You can use http://www.webresizer.com to get each image to manageable size of less than 128kb. Four such images can be attached to each post. If you want to post more than 4 pictures, just "reply" to the same thread thereby creating a new post, to which you can attach another 4 images.
It would be good to have the pictures in this thread instead of people having to bug you with PMs.
Hi Anwar,
Thanks a lot for the link. I have about 15-16 pics... not sure if I will be able to upload... I however have a pdf with me. Just wondering if you can upload if I send you the file. Do let me know your email ID. will send it to you.
Cheers
Saurabh
Since some users may be on slow links, one big PDF document is less preferred than attaching the pictures. Pictures become thumbnails that users can decide whether to download the full version or not. If you are unable to upload, please send the images to the email address on the bottom left.
Quote from: anwar on August 09, 2009, 10:16:55 PM
Since some users may be on slow links, one big PDF document is less preferred than attaching the pictures. Pictures become thumbnails that users can decide whether to download the full version or not. If you are unable to upload, please send the images to the email address on the bottom left.
Hi,
Dint get your email. Can u pls pm or post it here
SAURABH
Look at the green footer of any page, it has the contact email address.
One thing I must admit the plane is far more responsive on 2.4 G .
The controls act faster and the time lag is appreciably reduced.
Like the Easy cub will normally get tossed around a bit in high winds and so is a bit more difficult to control . Yesterday flying 2.4 G we were able to control it much better .
The capacitor is also really useful as right from the beginning I used to have servo "humming" on the easy cub , the same servo worked without a "hum" with the assan with the capacitor .
The range was fantastic I could not test it to max but with the easy cub flying at around 350 - 400 ft altitude the control responses were almost instentaneous
Saju could add more.
Anwar though I hate to admit it but 2.4 G gives good confidence especially the speed of control responses ;D ;)
Sai
Quote from: rcforall on August 10, 2009, 09:03:37 AM
The capacitor is also really useful as right from the beginning I used to have servo "humming" on the easy cub , the same servo worked without a "hum" with the assan with the capacitor
Sai
This may or may not apply in this case, but non-digital servo humming under "no load" conditions typically means that the physical setup is not ideal. This would indicate that the linkage rod is putting undue strain on the servo; possibly due to length or angle issues.
You could be right ;D see how easily I agree after Assan 2.4 G ;).
I had this problem and really did nothing about it , actually I have started taking Multiplex planes for granted .
With no changes to the set up except the addition of the capacitor and the 2.4 G receiver how come the " Humming " stopped ???
Saju explained yesterday about the Built in BEC converting power to the motor to 5 V for the receiver and the resultant noise due to the inefficiency of such a system , hence the capacitor helps by pumping in additional power when the servos need them.
That is why assumed it could be due to the capacitor .
Sai
Since Sai has left it to me to provide you with the details of the performance of the Assan Hack 8XD with Assan receivers for 2.4ghz:
a. 8ch RX were tried on two planes: Easycub and Multiplex Fox(20" glider modified with a 2204/14 attached, elevators and rudder)
Easycub:
b. The rx was inside the canopy with the antennae (2 wires) taped on either sides of the fuse, with one wire taped perpendicular to the other. The capacitor was also plugged in, in an empty socket. This cap is required, I believe, to filter any dips in the power supply at start of the servo actuator motors. In the case of the 72Mhz operation, the servo hum may be cured by a capacitor, but we never tried that earlier.. I think Sai we should try this and see if this reduces servo hum in the Mhz rxs.
c. In its 72mhz avatar, it had lot of servo hum. With the 2.4ghz it never showed servo hum with the 8XD hack.
d. Tried range on the ground to about 200 yards ... nary a glitch... perfect smooth and fast control
d. Next took up the Easycub to almost a small cross in the sky... couldnt make out attitude of the model at that height. very smooth control... fast response and very easy to operate... seemingly better control with quicker response.
Multiplex Fox (converted from glider to RC with 2204/14 motor, elevator and ailerons):
a. Had a smaller Assan 2.4Ghz receiver taped outside the canopy. This receiver had only one short (2cm) antenna with 6 channels. There was no capacitor in this case.
b. The plane was very fast and responded very well at high altitude. No instance of any loss of control. The plane was flown even at very high altitude (almost to a dot)
c. In the last flight, (after several very successful sorties), the plane suffered a crash head-on on its motor and the front part of the fuse alongwith the motor and mount ripped off. Still the receiver didnot have any issue and the servos were happily responding. This crash was because of mismanagement of the model by the flyer (myself... am really mortified by my mistake)
So on the whole we felt that the Assan 8XD hacks are very good ... perhaps better than the original Transy.
All the model memories remained in the transy and the change from 72Mhz to 2.4Ghz is acheived via a switch. During all this we never ever hand a loss of binding of the rx with the transy.
Also never observed any rise in temperature of the rx at any time.
So, folks I think this is the way to go if we are considering 2.4Ghz. In fact, if one is to believe what is happening in rcgroups, a lot of people owning original standard 2.4ghz equipment from Futaba, JR, Airtronics etc. are all queuing up to convert to the Assan 8XD hack because it is so much cheaper and is quite as reliable... There are documented cases of people owning more than ten models with one transmitter with conversion to Assan hack
I leave it to Sai to fill in with photos and other details.
Saju
Quote from: rcforall on August 10, 2009, 09:47:45 AM
With no changes to the set up except the addition of the capacitor and the 2.4 G receiver how come the " Humming " stopped ???
Sai
It is a general observation, which may or may not apply in this case. In many cases, just giggling the servo arm or linkage rod fixes the humming (temporarily), if that is the case, we can be pretty sure that it is a mechanical issue.
{:)} great stuff..i thought the rx being inside the canopy would result in some glitches at high altitude but with your report mr.saju everything seems to be going gr8.. {:)} {:)}
The rx has a remote receiver as well ? 200 yds is pretty nice, so its not a full range receiver ??
Looking for some pics..
Cheers
Atul G.
Quote from: atul_pg on August 10, 2009, 11:20:25 AM
The rx has a remote receiver as well ? 200 yds is pretty nice, so its not a full range receiver ??
Looking for some pics..
Cheers
Atul G.
Atul ,
The range check was done to 200 yards ( 600 ft )
The range of the radio/receiver is 300 - 800 m
Sai
Atul
Two denominations of the Assan receiver were tested. A large one (8 channel with two antennae) on the Easycub and a small one (six channel) with a short 2cm stub antenna on the Multiplex Fox. The large one (Sai, I do not know the name or spec number of these receivers... could you please elaborate on that) was fitted inside the canopy of the Easycub and the small white one was fixed by double sided tape on the outside of the Fox fuselage.
In all cases we never experienced any sort of glitch or servo-hum or unbinding of the receiver. Spec of these rxs assures operation even at 3vDc supply... So any sort of momentary dip of voltage will not create an unbind, I guess!!
Saju
Guys ,
Here is a link to Saurabh's review of the Assan Conversion:
http://is.gd/2a4RM
Sai
sai can you post some pictures of your fox conversion
sahil
Quote from: sahilkit on August 10, 2009, 12:10:27 PM
sai can you post some pictures of your fox conversion
sahil
Sure ill by evening
sai
Quote from: sahilkit on August 10, 2009, 12:10:27 PM
sai can you post some pictures of your fox conversion
sahil
Hi Sahil,
You will find a lot of pics of the conversion in my review. Do check them out. The link is given above by Sai. I suggest you download and then open the file. Would be more clear this ways :)
Dear Sai,
Thanks a lot for uploading the doc and sharing on the forum :)
Cheers !!!
Saurabh.
Quote from: saurabhhsrivastavaa on August 10, 2009, 12:40:01 PM
Quote from: sahilkit on August 10, 2009, 12:10:27 PM
sai can you post some pictures of your fox conversion
sahil
Hi Sahil,
You will find a lot of pics of the conversion in my review. Do check them out. The link is given above by Sai. I suggest you download and then open the file. Would be more clear this ways :)
Cheers !!!
Saurabh.
Saurabh ,
Sahil is asking about the conversion of Multiplex fox Glider ;D
:D sai please tell me chord length of the wing ?? also got a lithium ion 3.7v 200mAh battery 8grams with low voltage cutt of
n receivers on the way hitec 4,5 gws 4 used for 20$
sahil
Hey saurabh,
superb review, very nicely and professionaly done mate.. {:)} {:)}
gr8 work..
cheers
atul g.
Quote from: mpsaju on August 10, 2009, 12:00:09 PM
Atul
Two denominations of the Assan receiver were tested. A large one (8 channel with two antennae) on the Easycub and a small one (six channel) with a short 2cm stub antenna on the Multiplex Fox.
Saju
Here are the details of the two receiver :
1) X8 R6M 6Ch Micro 2.4GHz Receiver (Short Antenna)
2.4GHz receiver for Assan X8 systems.
Compatible with all X8 transmitters.
Size: 43 X 20 X 7mm (1.77 X 0.78 X 0.27 inch)
Weight: 4.5g
2) X8 R7 7Ch 2.4GHz Receiver (Long Antenna)
2.4GHz receiver for Assan X8 systems.
Compatible with all X8 transmitters.
Size: 50 X 26 X 10mm (1.97 X 1.02 X 0.39 inch)
Weight: 8g
They both work great In fact the have good range
Sai
Quote from: atul_pg on August 10, 2009, 01:54:50 PM
Hey saurabh,
superb review, very nicely and professionaly done mate.. {:)} {:)}
gr8 work..
cheers
atul g.
thanks Mate... Will do the field review and flight check this Sunday. Will post my comments then. I am sure it will be great fun with 2.4 Assan.
Cheers!!
Saurabh
In what band of 2.4 does it transmit in DSS or FHSS and the bind/link channel it uses is 1 or 2 at a time.
Search the net you will find out there are Protocols apart from DSSS and FHSS. they are not the only ones.
Sai
I not good at searching the net :( Can you pls let me know you are doing the review ;D ;D ;D
You are getting upset ok will not ask you anymore questions. Sorry if you do like me asking you any questions ;)
Quote from: rckatty on August 10, 2009, 10:10:04 PM
You are getting upset ok will not ask you anymore questions.
??? ???
Schematic for conversion of Futaba 6 Exa to 2.4 G with Assan Hack Module .
http://is.gd/2bw85
Rgds
Sai
Hi,
One of my friend has this TX - Futaba FP-6NLK (Pretty old) http://manuals.hobbico.com/fut/5nlk-6nlk-manual.pdf
Just wondering if anyone can help confirming if this can be converted too.. Not sure if this has a PPM modulation.
Sai,
Could you comment please ???
Thnks
Saurabh
Saurabh ,
Any Radio with a PPM Board can be converted including AM .
I am not a techo but as I understand I explain in layman terms , any one correct me if I am wrong .
There are 2 parts to a radio's operations
1) Internal within the radio : something like intra functioning of the radio
2) External of transmission part
Now as I understand from what I have been told :
Part 1 normally operates on PPM for majority of the radios be it AM, FM , 2.4G or what ever .
Part 2 which is the carrier frequency is what is different . This is the RF module which is like 35 , 40 , 72 Mhz , 2.4 G etc .
Hence as I have been told by most experts the Assan Module is the part 2 plug in .
So basically it is operating on 2.4 G as a carrier .
I checked the Futaba 6 NLK is an FM radio so I would think that it has a PPM board .
I hope I am right .
Hey all you guys out there correct me if I am wrong.
sai
Quote from: rcforall on August 11, 2009, 08:37:23 PM
I checked the Futaba 6 NLK is an FM radio so I would think that it has a PPM board .
I hope I am right .
Hey all you guys out there correct me if I am wrong.
sai
Thanks Sai.
The last part answers my question. I certainly do understand that 2.4G is just the carrier. All I was wondering was whether this radio has a PPM output or not. I had a 6 Ch Esky Tx which was an FM tx but the RF board was integrated onto the main board. So it does not have a separate RF board or a PPM output. Just wanted to know if someone had a clue if this had a PPM output/separate FM board. Anyway thanks for your help.
Cheers
Saurabh.
Saurabh ,
The explanation was not for guys like you it is for guys like me ;D
sai
Saurabh
All AM, FM or 2.4Ghz transmitters other than specific PCM systems has to have a conversion of the voltage set by your joystick positions to 1ms to 2ms (pulse width) square wave pulse per channel every 50ms. i.e. The first pulse would be a synchronising pulse, the width of the next pulse will corrspond to channel 1, the next to channel 2 and so on. This series of repeating pulses are then fed as a modulating wave to the RF board which modulates the carrier wave accordingly. This process of creating the modulating wave encompassing the joystick position data as pulse width is what we call as PPM... Pulse Position modulation. Please have look at http://www.aerodesign.de/peter/2000/PCM/PCM_PPM_eng.html
The RF board is nothing but creation and modulation of the carrier wave and subsequent driving of the Aerial. When viewed as two entities, any ppm board can be coupled with any RF board for transmission
Saju
Quote from: mpsaju on August 12, 2009, 12:23:59 PM
Saurabh
All AM, FM or 2.4Ghz transmitters other than specific PCM systems has to have a conversion of the voltage set by your joystick positions to 1ms to 2ms (pulse width) square wave pulse per channel every 50ms. i.e. The first pulse would be a synchronising pulse, the width of the next pulse will corrspond to channel 1, the next to channel 2 and so on. This series of repeating pulses are then fed as a modulating wave to the RF board which modulates the carrier wave accordingly. This process of creating the modulating wave encompassing the joystick position data as pulse width is what we call as PPM... Pulse Position modulation. Please have look at http://www.aerodesign.de/peter/2000/PCM/PCM_PPM_eng.html
The RF board is nothing but creation and modulation of the carrier wave and subsequent driving of the Aerial. When viewed as two entities, any ppm board can be coupled with any RF board for transmission
Saju
Awesome !!! Thanks a lot Saju !!! This makes sense.
All you are talking about the pulse generated at a particular stick position that is fed to the RF board for transmission. I am in complete understanding and agreement to this. All I was wondering was if this Futaba NLK radio has a separate RF board or integrated to the main board itself.. I have actually not seen the tranmitter yet so not sure if the RF is integrated to the main board or is separate. ANyway will do this conversion soon once Sai gets his new oder and then let you guys know about my experience. I am sure I would be able to locate the Modulation port and then install the hack. Thanks for all your help and inputs.
Cheers!!!
Saurabh.
Oh Yes One more important thing !!!.
I got to know that ASSAN 2.4 GHz Hack module and all other modules from Assan are DSSS and not FHSS like Futaba/Airtronics. So, they do operate in the GHz spectrum, they are not very effecient countering strong interference like Futaba and JR. Futaba uses DSSS + FHSS while JR uses DSSS with redundancy (backup channel)
Cheers!!!
Saurabh.
Here is an interesting link:
It shows the review of 2.4 Gh technologies used by Futaba, JR, Airtronics, ASSAN.
http://www.rcmodelreviews.com/spreadspectrum01.shtml
Saurabh
Quote from: saurabhhsrivastavaa on August 12, 2009, 12:59:16 PM
Oh Yes One more important thing !!!.
I got to know that ASSAN 2.4 GHz Hack module and all other modules from Assan are DSSS and not FHSS like Futaba/Airtronics. So, they do operate in the GHz spectrum, they are not very effecient countering strong interference like Futaba and JR. Futaba uses DSSS + FHSS while JR uses DSSS with redundancy (backup channel)
Cheers!!!
Saurabh.
Please look at page 2 of this url: http://www.rcmodelreviews.com/imax9x2.shtml, were rcmodel reviews talks of the newer version of Assan as follows:
Based on my own tests and observations, the system appears to be a non frequency-agile DSSS system, not dissimilar to the Assan system, another 2.4GHz product out of China, although Assan have upgraded their system to use two separate parts of the band now.
This means they are frequency agile like the JR form of DSSS.
I also read elsewhere (rcgroups) that they have now 3 different redundant transmission frequencies simultaneously. Therefore they might atleast be as good as the JR. But this needs to be confirmed...
Saju
Hi Saju,
Thanks for the info.. Here is what I want you to see... http://www.youtube.com/watch?v=Di0COdazRRE this review was done recently with the Latest Assan V2 which is what we are getting now.. it still confirms that they are sticking ot only 2 channels int he GHz spectrum and not 3 :)
Anyway, I am not contesting on which one is better but for most of the cases and casual flyers like us, Assan should do the job. The comparision is just to show that though Assan is very good, but there are still better tx's available than Assan. For the price, ASSAN rocks...
Cheers !!!
With the noise generator, Futaba is the best countering interference. Though Assan does a good job too, but it does not hop to other channels as confirmed in the video above. :)
Saurabh
If you are talking of price... why not buy the cheap Turborix or HK 2.4ghz transmitter and hack out the rf board and use it on your regular MHz good transmitter. For the price it is cheaper than Assan... Please see this thread:
http://www.rcgroups.com/forums/showthread.php?t=967207&page=58&highlight=FlySky+2+4+GHz+hack+idiots+guide
Yes this does not give you the stirling performance that a Sanwa 2.4gHz (the only reported system that has had no problems in the branded 2.4ghz systems) or JR or Futaba gives... But for the money and the type of crowding we can possibly have in an airfield, this may be the best bet yet!!
Saju
Guys ,
I think Saurabh has already told that Assan rocks as far as Value for Money options is concerned .
We are not here to discuss about the Merits and the demerits of the best brands around with or without other issues nither are we here to discuss about the cheapest options like buying a cheap 2.4 G radio taking out the module and junking the rest though this is surely possible.
I don't think that the option of buying a 2.4 G radio and taking of the 2.4 G module and hacking a branded tx is one which is a great idea despite being the cheapest because :
1) I would rather pay a few dollars more and use a ready made proven module to hack my transmitter
2) Buying a Tx to junk it is mentally not a great Idea
3) if for any reason both don't work I then have 2 problems on my hand
4) Not everybody can disconnect a module from an existing Tx cut it and fit it onto another tx with confidence .
So despite your suggestion being possible which i am ready to try myself as I already have 2 such radio's that don't work due to soft ware issues I don't think I would do it for a starter . I would prefer to use proven options like Assan which apart from Airtronics is the only one that has not had major problems for whatever the reason.
It is been agreed all over that Assan is a good balance between quality and price.
Saurabh Futaba and Assan are in two different categories so leave Futaba , JR , Air tronics to Anwar :P and big wigs of the forum to.
Sai.
Price of the receiver X8R if i were to want one or two. Also prices of the Rx which are not full range.
Will revert soon.
sai
Quote from: rckatty on August 06, 2009, 09:43:21 PM
Also what 2.4Ghz technology is it using.
Assan uses DSSS technology it is not FHSS like Futaba.
Hi Guys !!!
I flew on Assan 2,4 Ghz module yesterday. It was just great. Did a range test on the ground with me in the car with the tx and a friend with the model on the ground. It worked flawlessly without any glitch for about 400mts (LOS). we did not go any further. having seen this I was confident that it would do wonders in the air. Without a hitch, i took off my Subaru from the ground. See the antenna position on my model (Pic below). I preferred the antenna to be pulled out of the model and perpendicular to each other.
It was too good. Never encountered any glitch or interference. My friends were flying Futaba 2.4 and there was no interference at all. 4 planes (3 on Futaba 2.4 and 1 Assan 2.4 ) were in the air at a time and no interference at all. The response of the model was instantaneous.
I would highly recommend the hack module from Assan. WORTH THE MONEY !!!
Cheers!!!
Saurabh.
Good to know that Assan worked well all the best {:)} {:)}
I specially like the speed of response on the aircraft don't know how this parameter compares with branded radio's
I guess you will be the best to judge this as you are also used to a FASST.
Sai technically 2.4ghz is always faster than mhz radios, as the data packets are carried differently. Therefore whether branded or not 2.4ghz radios are faster.
Basic Physics is understood higher frequency= speed , lower freq.= distance
I was asking Saurabh if there was an appreciable diff. between FASST and Assan as he uses both
sai
Sai you said that Assan does not use DSSS but saurabh said rightly it uses DSSS.
What ur take on it ;D :D ;D
Quote from: rcforall on August 18, 2009, 09:42:48 AM
Basic Physics is understood higher frequency= speed , lower freq.= distance
I was asking Saurabh if there was an appreciable diff. between FASST and Assan as he uses both
sai
Hi Guys!!!
To be real honest with you... i did not find any difference between the Futaba 2.4 and Assan 2.4. Both seemed equally responsive. The difference may be soooo small that it is of no significance. I flew on Assan and the very next flight i flew my friend's model on Futaba 2.4 Both seemed same responsive. infact my friend flew on Assan too and he could not make out any difference in the speed or response.
I believe the only difference is how both the systems encounter interference. To the Indian fields, and casual flyiers like us both are good. Assan no doubt is value for money with decent quality.
Cheers!!!
Saurabh
Assan hack modules and receivers should be in by either this Saturday or Monday.
Those interested could mail or PM me .
Sai
I got the same thing done to my EXA Futaba. Works great. I now want to switch over completely to Assan 2.4.
I have used the 72 as well as 2.4. Range is fantastic.
I wholeheartedly endorse the product.
Avijit