Abreviations used herein;
====================================================
KHz = KiloHertz                MHz = MegaHertz
 Kc = Kilocycles (same as KHz)  Mc = Megacycles (same as MHz)
PTT = Push To Talk            Rptr = Repeater
Xmit = Transmit               Recv = Receive 
Russ Wuertz wrote:
 RW>    OK... I transmit on 146.340 and a 600 Mhz offset automaticly
    KILOHERTZ - NOT MegaHertz ---------- ^^^^^^^^^
      (600 KHz = 6 tenths of a MHz)
 RW> activates (when I have my radio set to autoduplex) and I transmit
 RW> on 146.940.
And when you UNKEY the 'PTT' your radio returns to receive on 146.340!
                                                          
                          |     |                         
(Xmit) 146.940 -------->  |     | <------- 146.940 (Xmit) 
(Recv) 146.340  146.340 (Recv) 
                         -+-   -+-                        
                          |     |                         
        0 |            ___|_____|___          | O         
       \|/            |    ==x==    |          \|/        
       / \            |             |          / \        
       You            |  Repeater   |          Them       
   ---------------------------------------------------
    =====================================================
   ||               |  (audio & key)   |                ||
   ||  TRANSMITTER  |    (signals)     |  TRANSMITTER   ||
   ||   TUNED TO    |                  |    TUNED TO    ||
   ||  146.340 Mc   |          ---<----|   146.340 Mc   ||
   ||               |-->--    |        |                ||
   ||_______________|     |   |        |________________||
   ||               |     |   |        |                ||
   ||   RECEIVER    |      ------>-----|    RECEIVER    ||
   ||   TUNED TO    |         |        |    TUNED TO    ||
   ||  146.940 Mc   |----<----         |   146.940 Mc   ||
   ||               |                  |                ||
   ||               |                  |                ||
    ===================== REPEATER ======================
The rptr recvs your signal on 146.940 and REtransmits it at the
SAME time on 146.340 (*** 600 KHZ *** offset), then 'them' hears
it with a receive freq of 146.340.  When you unkey, 'them' xmits
on 146.940 - the rptr REtransmits it on 146.340 and since you have
YOUR receive set to that freq, you hear their reply.
You BOTH!!! Transmit on 146.940 MHz,
and you BOTH!!! receive on 146.340 MHz...
(just NOT at the same time. Only one
can transmit at a time (semi-duplex))
If you are trying to communicate on a SIMPLEX frequency, then you
need to shut OFF your "autoduplex" function, so that you xmit and
recv on the SAME frequency.  In this mode you will NOT be using a
repeater, and you should make SURE! you are on an accepted SIMPLEX
frequency (see comment re: book - below).  It is NOT cool to talk
SIMPLEX on the 'input' frequency of a repeater because you would
be tying up the repeater so no one else can use it.  On occasion,
it is OK to talk simplex on the output frequency of the repeater
if the other station you're talking to is close enough that you
can use a LOW power setting so as not to interfere with those
listening to (or for) traffic via the repeater.  In -ANY- case,
those using the repeater have priority, and if you want to talk
SIMPLEX ---> go to a SIMPLEX frequency...
Note: there are SOME places that have repeaters set up with an
      ODD offset (split) other than 600 KHz, or a REVERSED split,
      in which case you may need to manually set your radios' 
      offset instead of relying on the "autoduplex" function.
      If you don't have an 'ARRL Repeater Directory Handbook',
      you should probably pick one up at your local HamRadio Store.
      That little book will help you understand how repeaters are
      used in your area.   And last I checked, the cost was only
      about $6 at most...
      It (the book) will also list the various sub-audible (not
      "subliminal") tones used to access the rptrs in your area.
Hope this helps you understand repeater operation a bit better :)
--- WtrGate v0.93 Unreg
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