Without knowing antenna isolation, turnaround loss of the PA's, feedline
type, tower condition, and probably a few dozen other factors, it's hard to
say. What kind of interference potential are you insinuating? IM problems?
Desense?
Considering that the transmit frequencies are close enough to pass through
the opposing duplexer with little loss, without a sufficient antenna
isolation or isolators, IM is a strong possibility.
Desense between repeaters due to transmitter noise from repeater A raising
the noise floor at receiver B, or repeater A's carrier being too strong at
receiver B (and vice versa on both counts) is highly unlikely given the 25
kHz split and response of pass/reject duplexers at that close of a spacing.
--- Jeff
--------------------------------------------
Jeff DePolo WN3A - [EMAIL PROTECTED]
Broadcast and Communications Consultant
> -----Original Message-----
> From: Ken Arck [mailto:[EMAIL PROTECTED]
> Sent: Monday, February 07, 2005 5:30 PM
> To: [email protected]
> Subject: [Repeater-Builder] Theory versus practice
>
>
>
> Hi folks
>
> Imagine this scenario. 2 quality, UHF repeater colocated at
> the same site.
> Both repeaters are higher power ( > 50) out of duplexers,
> duplexers are
> high quality BP/BR types. Here's the kicker - they're spaced
> 25 Khz away
> from each other but not inverted from each other.
>
> Now, theory is one thing as to the interference potential
> without resorting
> to mulicouplers and combiners. But what is the real world problem
> potential? Anyone want to take a stab at this one?
>
> Ken
> --------------------------------------------------------------
> ----------------
> President and CTO - Arcom Communications
> Makers of state-of-the-art repeater controllers and accessories.
> http://www.ah6le.net/arcom/index.html
> We now offer complete Kenwood TKR repeater packages!
> AH6LE/R - IRLP Node 3000
> http://www.irlp.net
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
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