Crystals

[Harry Slone]

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 



       "Jeff Hughes" <jhughes at hsonline.net> 
        Sent by: discussion-request at nsrca.org 
        12/11/2002 01:43 PM 
        Please respond to discussion 

               
                To:        discussion at nsrca.org, "discussion" <discussion at nsrca.org> 
                cc:         
                Subject:        Crystals 



  What's the deal with high band and low band for futaba crystals? I'm
  having interference problems on channel 44 at our field, and a friend
  offered me an extra channel 35 transmitter module and one rx crystal.
  Can I switch over without harm? According to Tower's website 44 is
  considered high band and 35 low band.
  Jeff


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