I am not sure about a 3 way connector....A DB Products Model 224 has a splice in the middle, and feed point at the bottom. Might be worth while the double check the antenna and be sure the harness hasn't been tinkered with...
Steve NU5D
On 5/30/06, atms169 <[EMAIL PROTECTED]> wrote:
Yes, I was using the Top Half of a 4-element antenna. I have now
added the 3-Way connector and now have the entire antenna connected.
I have noticed it has cleaned up the receive on week stations but, it
seems to have dropped a little in the signal.
System was just re-tuned, duplexers and radios. It's a Motorola
MSR-2000 Canadian 40 Watt version. When I add the duplexers and the
top half of the antenna I get 25 Watts out. When I add the second
half I get 10 Watts out. Measuring the wattage just after the duplexers.
I guess we will see how well it works?
The antenna is somewhat at a good height. It's on a 55' tower on a
hill overlooking the City. I wish it was a little higher however,
that is not possible at this time.
Thanks
Aaron
VA6AE
--- In [email protected], "Steve Bosshard (NU5D)"
<[EMAIL PROTECTED]> wrote:
>
> Depending on the degree of coupling, at VHF, the loss in 2, 8"
cavities will
> be around 1.5 dB., send or receive. 10 LOG 25/42 comes to around
2.25 dB.
> A little on the high side. I don't understand where adding the
remaining 2
> elements to a 4 element antenna will change the loss.
>
> Seems the repeater delivers 42 Watts. The Duplexer adds 2.25 db of
loss. A
> 2 loop antenna will have around 3 dB of gain, and a 4 loop antenna
should
> have around 6 dB. of gain. Adding the second 2 loops should help
the send
> and receive by around 3 dB.
>
> I am making the assumption that you are now using the top half of a 4
> element antenna, and you plan to re-connect the bottom half?
>
> Steve NU5D
>
>
>
> On 5/30/06, KB6ZOP <[EMAIL PROTECTED]> wrote:
> >
> > That seems like a LOT of loss... Have you had the cans and antenna(s)
> > tuned?
> >
> > -----Original Message-----
> > From: [email protected]
> > [mailto:[email protected]] On Behalf Of atms169
> > Sent: Monday, May 29, 2006 9:46 AM
> > To: [email protected]
> > Subject: [Repeater-Builder] Double the gain or double the power?
> >
> > Easy question for all other repeater owners. What should I do?
> >
> > I have a pair of folded looped-dipole antenna's for my repeater which
> > pushes 42 Watts. Once I add the antenna and duplexers I get 25 Watts
> > output. The antenna has 4 looped-dipole antenna's with phasing
> > harness but I only use one set.
> >
> > So what should I do, should I continue using the 1 set of
> > looped-dipole antenna's at 25 Watts or do I add the second pair of
> > looped-dipole antenna's and push only 10 Watts out on the repeater (As
> > there will be a loss).
> >
> > Which would be better? I am sure I am doubling the gain for PEP.
> > Would I have a better receive on the antenna as well? Would it really
> > make it stronger?
> >
> > Aaron
> > VA6AE
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
>
>
> --
> Ham Radio Spoken Here.....NU5D
>
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/
--
Ham Radio Spoken Here.....NU5D
YAHOO! GROUPS LINKS
- Visit your group "Repeater-Builder" on the web.
- To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]
- Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
