crashedagain
Flight lieutenant
uhh, how do i keep it in the air?
Posts: 55
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Post by crashedagain on Nov 25, 2007 8:07:35 GMT 1
okay... so the wifey just asked me what i wanted for Christmas and i dunno where to start. I need some help from the SC club to answer some questions
Which is better? Futaba 6EX or Spektrum DX6i (with servos)?
What exactly is a "crystal"? Why would I need one?
DO i have to use brand-specific servos with the transmitter? Like... Spektrum Servos with the DX6i... or can i use a futaba servo with a Spek. Tx ?
now i need a good plane to put all this stuff in... Can anyone suggest one? I was thinking the T28 or BL SuperCub? Any ideas or suggestions?
Do boats come in a PnP version? I didn't find any. Maybe I was looking for the wrong terminology... is it called something else?
I know there are a lot of questions, but i hope to have at least some answered.
By the way, if anyone is planning on freeing up some hangar or dock space soon, please let me know what you have to offer.
Colin.
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Post by 05prostock on Nov 25, 2007 9:11:21 GMT 1
Please correct me if im wrong on any of this-
I would say the DX6i (opinion)
a crystal goes in your transmitter and receiver to provide a channel.
No. Most servos are universal
Im going to get the pnp mini pulse. It's a better deal than the arf I think since it comes with everything but tx/rx
I have no idea about boats.
Hope that helps
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crashedagain
Flight lieutenant
uhh, how do i keep it in the air?
Posts: 55
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Post by crashedagain on Nov 25, 2007 17:35:01 GMT 1
it seems that every website I went to is out of stock on the DX6i. Anyone knows of a place it is available? Now i understand the thing about the crystal being used to determine the frequency... thank you. Now arises another question; Are crystals only used in planes and helicopters? What else can they be used in that is store-bought? (not built at home)
Am i limiting myself by only looking at a Futaba and Spektrum Tx's? Are there others that are just as good that i should consider? I want a Tx that will grow with me, and not limit me to current technology.
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Post by duck9191 on Nov 25, 2007 20:38:10 GMT 1
other manufactures are hitec and jr. some radios have removable modules, like on the hitec eclipse 7, you can have a standard fm radio modules or you can have a spectra module were you can select any of the 72 mhz channels just by changing a dial. some manufactures also have 2.4 ghz modules too.
crystals were used in alot of radios, cb's could be modified to get more channels by changing out crystals. but there isnt anything else you could use the crystals out of your transmitter that i can think of off the top of my head.
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Post by mrmugen on Nov 26, 2007 3:43:44 GMT 1
I have had futaba's since the begining of time and they rock. I am not saying that to sell them trust me. I only use them. The 6ex is an awesome radio for the money. A plus to getting a 75mhz is that they are cheap, reliable, and rx's are dirt cheap if you want to add more planes to your hangar. DX6's are not full range radio's. They are for park flyers only. If you want to add planes and buy rx's for the dx6 they are 50 bucks a piece. A dx6 is a good radio if you like only park flyers and limited range. They are not a bad radio but the 6ex is going to be cheaper to grow with.
Crystals are channel specific. If you get a radio on channel 50 lets say, all you need to do is buy channel 50 rx crystals for all you new planes.
Remember that planes and heli's operate on a different frequency than boats/cars/trucks and all other ground vehicles. Normally in the US 72mhz is for air use only, 27mhz & 75mhz are for ground use.
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zeta30
Squadron leader
Posts: 162
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Post by zeta30 on Nov 26, 2007 3:52:33 GMT 1
If you get one of the two TX's you describe you won't need to worry about crystals. Those Tx's are 2.4GHZ and don't use them. That's the good news.
The bad news is that you are limited to what RX's you can use. The DX6i can only use Spektrum AR6000, AR6100 and AR6200 which range from about $45-$75.
The Futaba is also limited to Futaba brand RX's. I'm not too familiar with Futaba though.
I had a Spektrum DX6 for a little while and got a great deal on a DX7. The only reason I switched was because I fly Heli's too and the DX7 has a 5 point pitch curve instead of 3 that's on the DX6.
If you went with a 72Mhz TX the RX's are less expensive, but you don't get the benefit of the 2.4Ghz technology and run a greater risk of interferance.
There are a bunch of different 2.4 Ghz TX on the horizon but I don't think they'll be out until after the first of the year.
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crashedagain
Flight lieutenant
uhh, how do i keep it in the air?
Posts: 55
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Post by crashedagain on Nov 26, 2007 11:06:26 GMT 1
Kevin and Zeta, thank you so much for your input. Kevin, You said that i have to buy a crystal which corresponds to the radio: Can't I buy a crystal for the Tx too, or am I mistaken. I am interpreting your statement as; The Tx's frequency can not be changed, thus the reciever has to match the Tx's frequency. I am curious because if i run in to interference issues using the 72MHz, then can't i change out the crystals in both the Tx and Rx to another (non-used) frequency and keep flying? Now i never thought about the differences between the 72MHz and the 2.4GHz until i read your replies. The DX6i and 6EX are both 2.4's or no?
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Post by mrmugen on Nov 26, 2007 13:18:49 GMT 1
You can put any channel crystal you want in your radio. I run about 8 different crystals in different planes and switch them out of the radio at the field.
The futaba 6ex fasst is 2.4ghz but the regular 6ex is not. I had a few of the 72mhz 6ex's and they are a good solid radio.
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crashedagain
Flight lieutenant
uhh, how do i keep it in the air?
Posts: 55
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Post by crashedagain on Nov 27, 2007 11:28:16 GMT 1
Are there any TX's for which i can buy an array of Rx's to work with? i don't like the idea of being tied to "X" Rx's because i bought a "X" Tx. Do i have any options? I would prefer it to be a 2.4GHz. K, i gotta be at work at 6am... laters people
Colin.
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Post by duck9191 on Nov 27, 2007 18:04:56 GMT 1
with 2.4 not really. there is no industry standard yet amongst them as each manufacture is still developing the technology. the 72 mhz systems are pretty much compatible with one another, other then the hole +/- shift thing, but most systems can detect and adjust.
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Post by mararra on Nov 28, 2007 3:21:25 GMT 1
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Post by mrmugen on Nov 28, 2007 5:37:07 GMT 1
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crashedagain
Flight lieutenant
uhh, how do i keep it in the air?
Posts: 55
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Post by crashedagain on Nov 28, 2007 11:22:41 GMT 1
i guess after all i was reading, i may be better going with a 72MHz Tx. In the future when the 2.4 systems have become more universal (mix and match Rx's) I'll consider it. However, what is a good Tx to use for now? Cheap, sturdy, easy to use and... uhh cheap. Can I use a 4ch RX on a 6ch Tx? or must i always use a 6chRx? What is Negative shift (on a servo)? So with a 72MHz Rx, I'll need to use a crystal? what makes one Rx better than another? what makes one Servo better than another? p.s. I won't apologize for the newbie questions . Think of it as you training me NOT to crash into your planes ;D. Good day all... and thank you for the answers I have recieved so far
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crashedagain
Flight lieutenant
uhh, how do i keep it in the air?
Posts: 55
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Post by crashedagain on Nov 28, 2007 11:23:38 GMT 1
okay... well maybe i will apologize... so - Sorry for all the Newbie questions guys.
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Post by gregmarine on Nov 28, 2007 14:22:41 GMT 1
Questions are good. The only stupid question is the one not asked. We are all here because we love the SC. We are all also here to help each other out. That is all a part of the fun in this hobby! So, ask away :-D
-Greg
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