Re: [Repeater-Builder] 2 repeaters / one antenna

[mch]

I would recommend lightning protection (specifically Polyphasor). Since
it should be at the enterance to the building, and the duplexers (the
two on the repeaters and the one combining the repeaters) should all be
inside the building, they would all be protected. That should eliminate
the lightning issue.

The tower is another matter, but in this case the combined feedline is
not diplexed back to two separate antennas, so it's a non-issue.

Joe M.

Paul Finch wrote:
> 
> As long as you don't take a lightning strike you will be fine.  
> If/when that happens buy another 60 dollar coupler.





 
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Re: [Repeater-Builder] 2 repeaters / one antenna

[mch]

TX-RX, but if it the existing setup works... :-)




Joe M.


ve3iny wrote:
> 
> I have two repeaters,  one running 144.67/145.27,  the other running
> 448.8/443.8.  I use a ham grade diplexer (Daiwa or MFJ or something)
> to connect the output(s) of the 2 meter and 440 duplexer(s) to a
> single feedline feeding a dual band Cushcraft colinear.
> 
> This set-up works great,  and the diplexer introduces very little
> VSWR
> into the system.
> 
> Howver I am sure there is a more professional method of combining the
> two repeater duplexers to the common feedline.
> 
> Any suggestions ?
> 
> 
> Yahoo! Groups Links
> 
> 
> 
>





 
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Re: [Repeater-Builder] 2 repeaters / one antenna

[kd6hcn]

Sure, you could introduce a "antenna combiner" at
$2000.00 a channel/port.

I've used the same set up you have for many years and
since it's a ham box why bother spending the big bucks
for the users unless they are paying for it:)

Regards, Barry


--- ve3iny <[EMAIL PROTECTED]> wrote:

> 
> 
> I have two repeaters,  one running 144.67/145.27, 
> the other running 
> 448.8/443.8.  I use a ham grade diplexer (Daiwa or
> MFJ or something) 
> to connect the output(s) of the 2 meter and 440
> duplexer(s) to a 
> single feedline feeding a dual band Cushcraft
> colinear.  
> 
> This set-up works great,  and the diplexer
> introduces very little
> VSWR 
> into the system.  
> 
> Howver I am sure there is a more professional method
> of combining the 
> two repeater duplexers to the common feedline.
> 
> Any suggestions ?
> 
> 
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> [EMAIL PROTECTED]
> 
>  
> 
> 
> 
> 




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RE: [Repeater-Builder] 2 repeaters / one antenna

[Paul Finch]

Not really, there are more expensive crossband couplers though.  As long as
you don't take a lightning strike you will be fine.  If/when that happens
buy another 60 dollar coupler.  I used one of the cheap Comet crossband
couplers fro years until I built my tower, I then came across a tower
company that was going out of business and I bought all his "stuff" for
pennies on the dollar.  Along with that "stuff" came about 20 Microwave
Associates crossband couplers of varying models.  They are built like tanks
inside and do pretty well in lightning strikes.  I have had several at 475
feet since late 1998 with no problems.

Paul
WB5IDM



-Original Message-
From: ve3iny [mailto:[EMAIL PROTECTED]
Sent: Monday, October 04, 2004 7:20 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] 2 repeaters / one antenna




I have two repeaters,  one running 144.67/145.27,  the other running
448.8/443.8.  I use a ham grade diplexer (Daiwa or MFJ or something)
to connect the output(s) of the 2 meter and 440 duplexer(s) to a
single feedline feeding a dual band Cushcraft colinear.

This set-up works great,  and the diplexer introduces very little
VSWR
into the system.

Howver I am sure there is a more professional method of combining the
two repeater duplexers to the common feedline.

Any suggestions ?








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