[Repeater-Builder] Min FREQ Separtation, VHF rep, No Duplexers

[courir26]

I'll rephrase the question, what is the min frequency separtation for 
a 10W repeater with two ants, no vertical separation, horizontal sep 
of about 100'.

I'm guessing it would have to be 2 MHz or more, but that is what I'm 
asking.

Please don't answer .600 and 200' vertical because that is not the 
question.

I'm referring to an emergency or garage repeater with odd split.

Thanks!

Tom N5OFF






 
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[Repeater-Builder] Re: Possible Unlicensed Operation in the Deep South...

[courir26]

This stuff is very common in the gulf of mexico.

I often hear illegals in the 158-161 range speaking Vietnamese.  
Possibly shrimpers.

73 Tom 
Lafayette, LA

--- In Repeater-Builder@yahoogroups.com, Steve Grantham 
[EMAIL PROTECTED] wrote:
 In recent days (nights), the band conditions being a bit longer for
 two-meters than usual, we have been hearing some Chinese language 
stations
 (..definitely sounds like an oriental language..) transmitting on 
146.010
 MHz.  Such stations are being heard around midnight CDT, plus or 
minus a
 couple of hours, coming through the local club repeater here in 
Laurel MS.
 
 I suspect that this may be foreign shipping traffic, either off 
shore in the
 Gulf of Mexico, or navigating on the Mississippi River.  It sounds 
like the
 two operators are communicating inter-ship, and possibly using 
marine-VHF or
 other 2-meter station antennae mounted somewhere high up on ship.  
(Could be
 ship to shore intercom too..)
 
 I have an idea that this may be coming from the Convent Louisiana 
area,
 where a Chinese rice shipping terminal is located.  If there are any
 stations down south with rotatable Yagi antennae, please listen and 
let me
 know the bearing from your location to the source of any such 
signals.
 Please keep a log of times, etc.
 
 Also, if you are able to monitor and record these signals, that 
would be
 helpful too.. Particularly if you are able to receive them on the 
repeater
 input frequency (146.010 MHz.)
 
 I appreciate your assistance in this matter.  If you are unable to 
help,
 then please excuse the bandwidth.
 
 Thanks!
 Steve Grantham, AA5SG
 Laurel / Ellisville MS






 
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[Repeater-Builder] Min Separation for VHF, no duplexer, 2 ants?

[courir26]

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








 
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