RF & RA Crystals what's the difference???? - RCCanada - Canada Radio Controlled Hobby Forum
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Old 04-09-2006, 09:47 AM   #1
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RF & RA Crystals what's the difference????

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Just got a Hitec feather RX, and had a CH 23 RF crystal to try in it.. well it doesn't work but I have a CH 23 RA that does.. Now I also have a Hitec Micro 555 RX that works with the RF Xtal.. So what is the difference between these two Xtals????
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Old 04-09-2006, 10:00 AM   #2
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most likely single and dual channel crystals

I found this while searching http://www.crovencrystals.com/crystalfacts.htm
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Old 04-09-2006, 10:04 AM   #3
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Hitec Crystals

The RF crystal is an FM Dual conversion Crystal, the RA is an AM single conversion Crystal, thats the short story on the difference. The Feather reciever is a single conversion FM receiver and it should work with the RA or AM single conversion crystal but it won't work with the RF dual conversion FM crystal. I'll leave the long detailed explanation for someone who's more up on their radio theory than me.

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Old 04-09-2006, 10:09 AM   #4
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See http://www.hitecrcd.com/Support/Faqs/new_FAQ_Gen_RX.htm

RA crystals are for Single Conversion receivers.
RF crystals are for Dual Conversion receivers.

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