Quote from: sahilkit on January 18, 2010, 10:26:19 AM

QuoteThe 148 page thread on Flying giants is a pretty good bed time reading

link please

http://www.flyinggiants.com/forums/showthread.php?t=29975

thanks for the link and 50c temperature rating was for transmitter not receiver (rechecked manual)

sahil

That sounds more like it.  When I was initially investigating the Futaba heat issues, I remember reading that both Spektrum and Airtronics were somewhere in the 70 to 71 Celsius limit for receivers.

happy to report that there has been a crash reported while using a ATX, now i know the system works  

http://www.rcgroups.com/forums/showthread.php?p=14324319#post14324319

Visited one of our LHSes today, and they showed me the new stock of the older model R617FS Futaba FASST receivers.  All had the white dots near the antenna.

So these must be the higher heat tolerance ones.

increasing range of 2.4ghz
Long Range RC Radio Project  with 2.4 Ghz 
http://fpvpilot.com/LongRangeRadio.aspx

Avinash

Thanks for posting the link.

But range has really never been the issue with 2.4GHz.systems.

wow that's 4 times more power 

another technical aspect is 2.4 ghz length of  antenna required will be less than a 72mhz, u can see it.


2.4 ghz will have more range than 72mhz 

shorter antennas like in 2.4ghz are cool that donot render our movement.


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and AM systems will have more higher antena length
less range  

Quote from: dinil on March 13, 2010, 01:16:19 PM

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and AM systems will have more higher antena length
less range 

Gee guys, this appears to be one big advertisement for 76mhz and Corona receivers. I have both 35mhz and 76 Mhz and I'm rather reluctant to admit even some 27mhz equipment. Thankfully they all sit in storage boxes and the 2.4ghz radios are all I use. I have Futaba, Spectrum, Multiplex, Various generic brands and Turnigy 9X and 9XR and 9XR Pro. in 2.4ghz. I have 40 planes, 30 boats and 17 multicpoters all fitted with 2.4ghz receivers. I have a number of Corona receivers as well for a VHF Multplex transmitter, but as yet have never had reason to fit them to anything.

I have had one bad experience associated with 2.4ghz and that was with a Spectrum Receiver. I haven't discovered why it decides to suddenly swittch off because I can't duplicate the problem on the bench, even after repeated shock tests, vibration, hot or cold. Needless to say it now sits on the shelf along with the lower frequency gear. Apart from that one receiver and another, the identical model and make as mine are the only problems I've ever had or seen which could be directly attributed to it being 2.4ghz. I've seen Coronas drop out of the sky and behave in very unusual ways due to RF interference but as already mentioned that can happen on any frequency and more likely on the lower frequencies.

2.4ghz adopts the frequency hopping method to combat co-channel interference apoint made clear by something like 20 gentlemen playing "Let's see who's the last left flying" game with their flying wings on YouTube. I've never seen 20 flyers switch on their radios and be able to fly their aircraft immediately with any other frequency. I do however see the fact that 2.4ghz is also the band used by thousands of different gadgets around the home and offices, from TV re-senders to garage door openers. In fact a Gentleman very close to my home and even closer to the flying field is using one of those very dirty and nasty 2.4ghz expanders. Or to use it's correct name Amplifier. No matter which frequency my receivers are listening to his Modem's Wifi amplifier completely wipes out any chance of reception. Luckily I was able to quickly discover who and what was causing the problem and now we have to give his place of business a wide berth. I'm very sorry the Government saw fit to close our Radio Inspectors branch for our area.

I may be wrong, it certainly wouldn't be the first time but I see this thread as rather commercial in nature and almost an attempt to sour the use of 2.4ghz. The frequency has wholeheartedly been adopted by the vast majority of RCers and it's often the older members who hold on to what they're used to. I can understand why many don't wish to spend money on new equipment and change all those receivers, but please accept the fact that 2.4ghz isn't a problem and if it was the cause of many crashes and drop outs etc. the RC community would be screaming for change, something very easily done with today's equipment. You have many youngsters new to RC and due to their eagerness to have the right equipment they are easily misled when seeing threads hinting to problems with 2.4ghz. It's inexpensive, sophisticated and reliable, exactly what they want, why try to change that which shouldn't be changed, unless there's more profit in 76mhz of course.

Sorry for the ramble and sorry if I got the wrong message from this thread, it certainly seemed rather suspicious to me and I thought it needed comment.  Stu.

perhaps you could check the date of the last post ? 

Quote from: saikat on January 24, 2015, 08:12:11 PM
perhaps you could check the date of the last post ? 

@propfella sir,
Here's an example of a person whom i like to address as Sir.
His very politeness deserves it...

@saikat sir
Copy to you.
You'd be aware of the context - how to address people you've never met...

Perhaps you can explain why this post appeared in my "Recent Posts"?

The matter isn't exactly dated. I was concerned that new RCers may see this thread and wrongly assume there was something amiss with using 2.4ghz. A good reason for making my post I feel. Does any topic related to RC really become dated. I'm still using similar items I used during my first build, back in 1957. Obviously 2.4ghz hasn't been around that long, but has 2.4ghz changed much in 5 years?. I'm sure many people would see the thread's heading and not see the date, after all it is in rather a tiny font. Perhaps my post brought it up to date.

KK Iyer, Hello, I see you mentioned me in your post but I'm afraid I don't quite grasp the meaning of it. Perhaps you would explain further please. Thank You.   Stu