Usually, you use a backbone frequency on a different band (in the US 220 Mhz & 
up) or a dedicated dc controlled phone line so you can have the desired linking.

It is difficult, but not impossible, to link on the same band. Is that you will 
thinking of implementing.?

Adam Kb2Jpd

-----Original Message-----

From:  "Ian Wells" <[EMAIL PROTECTED]>
Subj:  [Repeater-Builder] very close frequencies seperation
Date:  Mon Mar 27, 2006 4:21 pm
Size:  2K
To:  <Repeater-Builder@yahoogroups.com>

    v\:* {behavior:url (#default#vml);}  v\:* {         BEHAVIOR: url 
(#default#vml) }         Hi guys .I am trying to receive 473.575mhz from a 25 
watt repeater ,line of sight, 50kms away and and retransmitt it on 473.200 at 
25 watt on another site.The transmitt antenna is a 6db vertical ,9 meters above 
ground and the rx antenna is a 6 db uhf beam 1-2 meter above ground ,aimed at 
the 473.575 site Is it possible to notch out frequencies going into a receiver 
that are275 or 375 khz off a uhfreceive signal or is it going to be too close 
to filter outthe TX . 
 
  Thank You,
 Ian Wells,
 Kerinvale Comaudio,
 www.kerinvalecomaudio.com.au
 

            

  
 
  

         
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