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01-24-2007 07:10 AM  10 years agoPost 1
soulrider911

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Novato Ca

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I am getting a hitec electron 6 negative shift fm dual conversion rx, to go with a futaba 7c radio...will the same dual conversion xtal that works in a pcm rx work in it???

Why don't cats get gray hair with age?.....

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01-24-2007 01:45 PM  10 years agoPost 2
slider46

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Ocala Florida

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I would plug a few servos into the RX with the dual conversion Xtals and see what it does. It will either work or not work, and you didn't break anything trying it out....

Tom..... No "D" flying....

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01-24-2007 02:58 PM  10 years agoPost 3
Greybird

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Davie, Florida

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Cancel the order. Get a Berg. I think the Berg is cheaper anyway. The Electron is a glitch monster.

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01-24-2007 05:01 PM  10 years agoPost 4
marc8090

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Long Island, N.Y.

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To answer your question, no, the Futaba crystals will not work in the Electron 6. You must use Hitec dual conversion crystals. Also, Futaba pcm crystals are FM dual conversion, they're no such thing as a pcm crystal. On a side note, I agree do NOT use an Electron 6 in a T-Rex. I know some people have gotten them to work but every one I've ever seen has glitched. They do work perfectly in planes though. If you have a Futaba pcm tx, then get the R146IP Futaba pcm rx.

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01-25-2007 03:10 AM  10 years agoPost 5
soulrider911

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Novato Ca

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Just for clarification...Futaba crystals do work in hitec recievers...they just have to be negative shift. I have just bought an electron 6 fm dual conversion and I put a futaba dual conversion xtal in it works flawlessly....a crstal is a crystal .
Thanks

Why don't cats get gray hair with age?.....

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01-25-2007 03:19 AM  10 years agoPost 6
clive45

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NSW Australia

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Crystals are not crystals, far from it. They are manufactured to very specific criteria. They can be for serial or parallel tuned circuits and also various cuts, and that does not even scratch the surface.
Some will work in other Rx etc but they might be just on the edge. Is your model worth more than a crystal......... You make the decision.

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01-25-2007 03:28 AM  10 years agoPost 7
marc8090

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Long Island, N.Y.

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It might SEEM to work fine until one day when it doesn't. Do NOT mix and match crystals between brands.

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01-25-2007 04:47 AM  10 years agoPost 8
Raptorz499

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NJ

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marc8090...I second that. I have seen this happen too many times with terrible results often resulting in crashes.

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01-25-2007 05:23 AM  10 years agoPost 9
dkshema

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Cedar Rapids, IA

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On a side note, I agree do NOT use an Electron 6 in a T-Rex
Two years and going on my first T-Rex and Electron 6. Initially glitched till I installed a ferrite toroid on the ESC to RX cable. Two years of flying glitch free ever since.

Been flying an Electron 6 in a Kyosho EP400 for over a year, no glitches there either.
they just have to be negative shift
The crystal has nothing to do with "shift". They are neither positve or negative, they simply are good at oscillating at a fixed, fairly precise frequency over temperature and voltage excursions. The "shift" is a function of the design of the receiver's discriminator or ratio detector. That has nothing to do with the crystal frequency.

As for "a crystal is a crystal" -- well, not exactly. Oscillator circuits are designed with a specific set of crystal parameters in mind, one of them being the actual center frequency. But the crystal itself has its own set of electrical parameters, and may be designed to operated correctly in series-resonant mode, or parallel-resonant mode, and generally the oscillator circuit has a few small value capacitors sprinkled around it as the crystal is also designed to work with a specific load capacitance, among other things. A crystal MAY work in a circuit not designed for it. But, you always run the risk that it will occasionally not start up and run, may start up and run in the wrong overtone mode, or may work just fine, but the start-up characteristics of the circuit, along with the power levels used to drive the crystal can cause microfractures in the crystal (if it's not designed for those levels), usually around the point where the wire leads interface to the plated contact area on the crystal. These fractures as a minimum may eventually lead to flat out mechanical failure, or cause the crystal to behave in unpredictable fashion. It's so easy to buy the right crystal when you pick up a new receiver. The right crystal is much cheaper than the occasional unexplained crash.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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01-25-2007 09:48 AM  10 years agoPost 10
TrexRookie

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San Francisco, CA

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Well, good news is, he's not using the crystal in a TRex of any size...

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01-25-2007 10:21 AM  10 years agoPost 11
clive45

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NSW Australia

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Don't forget any size heli or aircraft can kill or maim. Saftey should be formost when using any R/C gear and aircraft....

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01-25-2007 01:36 PM  10 years agoPost 12
electriciancarl

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East Mesa Az.

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a hooker is a hooker untill you realise she has balls.
OK Willy, there's got to be a good story behind this.

Treat me good, I'll treat you better. Treat me bad, I'll treat you worse.

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01-25-2007 04:14 PM  10 years agoPost 13
TrexRookie

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San Francisco, CA

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too much information....

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01-25-2007 09:14 PM  10 years agoPost 14
soulrider911

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Novato Ca

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thanks for all the ummm...input guys...by the way its going in a plane anyway..but I decided to use a hitec xtal since it appears that everyonbe is very confident in that using a fut one could result in disaster.
thanks

Why don't cats get gray hair with age?.....

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