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HomeRC & Power✈️Aircraft🚁HelicopterRadio - Servo - Gyro - Gov - Batt › JR 770 - *New Crystal Question?*
01-10-2006 12:42 AM  13 years ago
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spritefiend

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Camarillo, CA

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JR 770 - *New Crystal Question?*
im not familar with JR equip at all, all i know is i need this receiver, and i have 0 idea which crystal goes with it?

horizon has a bajillion different crystals and the page on the 770 is absolutely worthless in pointing me the correct direction.

i would appreciate the help
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01-10-2006 01:13 AM  13 years ago
Saint728

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Honolulu, Hawaii

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Get the same crystal number that your transmitter has. If you need a pair of crystals then choose a number that not many people at your field have. The crystals you need are the standard JR single conversion FM crystals.

Take Care,
Cheers, Patrick
Check the hotties in my Gallery
http://rc.runryder.com/helicopter/gallery/9019/?all=photo
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01-10-2006 01:22 AM  13 years ago
spritefiend

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Camarillo, CA

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hehe yes i got that part i need the model # of the crystal, there are single and dual conversion and some xg or bg crap.

the 770 info page doesnt say what it needs, and none of the crystal descriptions say what its used for =|
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01-10-2006 01:40 AM  13 years ago
mmcrrc

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Berea, KY US

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Be sure and tape down the crystal......check this threadMatt
Learning to fly one crash at a time.....
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01-10-2006 02:01 AM  13 years ago
Saint728

rrProfessor

Honolulu, Hawaii

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The crystals you need are the standard JR single conversion FM crystals.
Here is a link from Horizon Hobby. It is the start of the Transmitter crystal you can choose from. http://www.horizonhobby.com/Shop/By...randID=JRP&;CatID=RPX&SearchType=Standard&SortBy=CatDesc&SortDirection=ASC&Page=17 The receiver crystals are listed here. http://www.horizonhobby.com/Shop/By...randID=JRP&;CatID=RPX&SearchType=Standard&SortBy=CatDesc&SortDirection=ASC&Page=22

Take Care,
Cheers, Patrick
Check the hotties in my Gallery
http://rc.runryder.com/helicopter/gallery/9019/?all=photo
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01-10-2006 02:09 AM  13 years ago
spritefiend

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Camarillo, CA

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Saint728
oops, sorry saw the start of the paragraph and discarded anything else as useful.

thanks a bunch, i found them.

John.
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01-12-2006 12:48 AM  13 years ago
spritefiend

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Camarillo, CA

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ok great.. so i get the stuff, and the receiver is supposed to be without a crystal, and comes WITH one. Its on ch35, my channels are 25 & 28, i ordered said crystals.

so the question is, should i get this retuned for 25 or 28 or just leave it? id assume its a rec/crystal thing across all brands, but im only familar with futaba and learning airt.
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01-12-2006 12:54 AM  13 years ago
9387ASH

rrElite Veteran

UK

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You are allowed to move receiver crystals in and out without fear of Big Brother Govt breathing down your neck.

Also, JR receivers are not banded so swap receiver crystals away, and there isnt any real requirement to get it retuned !

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01-12-2006 01:00 AM  13 years ago
spritefiend

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Camarillo, CA

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Also, JR receivers are not banded so swap receiver crystals away
as in no "high" or "low" bands?
You are allowed to move receiver crystals in and out without fear of Big Brother Govt breathing down your neck.
hehe that im NOT worried about, just dont want any problems with doing it.
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01-12-2006 01:03 AM  13 years ago
9387ASH

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UK

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Correct....

No Hi , No Lo... just one single all inclusive band.
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01-23-2006 08:34 PM  13 years ago
jvanscoyk

rrVeteran

Tucson, AZ

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JR makes a dual conversion receiver that is supplied with the 10X radio.
The crystal that comes with that receiver is in a "red" case.

The 770 receiver is a single conversion receiver. The crystals are in a "grey" case.

So in short you need to get a single conversion crystal that is in a grey case.

I hope that makes sense.

Jim
must go faster, must go faster.........
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