Crystals

[Harry Slone]

Thanks, all.  This hobby dealer first puts the receiver down on the counter....and then says "What crystal do you need?".  I'd better talk to him.  Though, I've never had range problems.
Harry..

  ----- Original Message ----- 
  From: s.vannostrand at kodak.com 
  To: discussion at nsrca.org 
  Sent: Thursday, December 12, 2002 3:13 PM
  Subject: Re: Crystals



  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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