Crystals

[Anthony Romano]

Some brands are tuned to work with the whole range. Futaba and I think JR 
are tuned for high and low.





>From: s.vannostrand at kodak.com
>Reply-To: discussion at nsrca.org
>To: discussion at nsrca.org
>Subject: Re: Crystals
>Date: Thu, 12 Dec 2002 14:13:56 -0600
>
>No problem.  THe differences are in the receivers, not the crystals.  Just
>be sure you know if your reeiver is low or high band, then just buy the
>crystal a channel that the receiver will work with.
>
>--Lance
>  Forgive my ignorance....  My local hobby store sells receivers, PPM, and
>separately sells crystals for them.  Might be channel 6..or 60.  Could
>this be a problem?
>
>Harry..
>
>  ----- Original Message -----
>
>From:  s.vannostrand at kodak.com
>
>To:  discussion at nsrca.org
>
>Sent: Thursday, December 12, 2002 1:59 PM
>
>Subject: Re: Crystals
>
>
>
>Tony S can give you the tech detail, but receivers are tuned circuits. The
>crystal is key to creating the reference frequency used to filter the
>signal picked up on the antenna.  The crystal sets up the basic reference
>frequency and the circuitry around it can only be used for a narrow range,
>or band, of frequencies.  The futaba receivers come in two types that have
>components that tune each to a different band.  You can put a low freq
>crystal in a high band receiver, but you'll have a detuned system, reduced
>range, and possible signal lock loss.  I wouldn't do it.
>
>--Lance


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