courir26 wrote:
> I have an academic question for the group (point me to a manual or
> online reference if needed).
>
> If one was to build a VHF repeater, say 10W transmit, two antennas
> and no duplexer, what is the minimum frequency separation needed?
>
> I know it depends on a lot of things, such as power, receiver front
> end, vertical and horizontal ant sep, etc.
>
> Any rule of thumb?
>
> 73 tom
>
From a commercial standpoint, I have seen on-site repeaters operating
at 300 Khz. There are duplexers available for that amount of spearation,
but they're not cheap.
I've not seen much closer than that on-site. Split site is another
matter. With enough distance, you can go as low as 30 KHz for a normal
FM receiver, maybe 15 if you really keep an eye on deviaiton. And some
people have had on-channel repeaters, but it was split-site on either
side of a REALLY BIG mountain. The two sites could not hear each other
at all.
--
Jim Barbour
WD8CHL
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/Repeater-Builder/
<*> To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
