and Jeff are giving me on this.
Terry KM5UQ
From: Eric Lemmon wb6...@verizon.net
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, September 20, 2009 12:52:35 PM
Subject: RE: [Repeater-Builder] UHF Duplexers
Terry,
In lieu of the ideal bench equipment, yes
: [Repeater-Builder] UHF Duplexers
The most obvious problem when using a handheld radio is that the antenna
connection on a handheld is very seldom optimized at 50 ohms...a VNA has
precise 50 ohm matches on all ports...
.
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of terry dalpoas
Sent: Saturday, September 19, 2009 8:58 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] UHF Duplexers
Eric,
The repeater is 70cm
: Jeff DePolo j...@broadsci.com
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, September 20, 2009 10:16:59 AM
Subject: RE: [Repeater-Builder] UHF Duplexers
You should be tuning the bandpass for maximum return loss, not least
insertion loss.
I've found that older Wacom duplexers develop
Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of terry dalpoas
Sent: Saturday, September 19, 2009 5:58 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] UHF Duplexers
Eric,
The repeater is 70cm amateur (444.625 TX
From: Eric Lemmon wb6...@verizon.net
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, September 20, 2009 11:25:03 AM
Subject: RE: [Repeater-Builder] UHF Duplexers
Terry,
I understand and appreciate the fact that you are forced to employ a
makeshift procedure
:02 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] UHF Duplexers
Jeff,
Best I can tell the connecting harness is good. I may try
the set meant for the link radio and see what they do. How
do I tune for maximum return loss? If it is better, you can
WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of terry dalpoas
Sent: Sunday, September 20, 2009 9:41 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] UHF Duplexers
Eric,
I did find my old
At 9/20/2009 09:41, you wrote:
Eric,
I did find my old Icom IC-2710 dual band mobile last night. Would that be
okay to use instead of the HT?
I suggest putting an isolator between the mobile radio duplexer (or
wattmeter, if you're measuring return loss). That will make your mobile
Just about finished with the Mastr II UHF repeater. I've run into a problem
with the duplexers. They are a set of WACOM BpBr Model WP678. I am putting
48W into them, but only 18.5W out. I believe this should be better. RX will
open squelch at around .2-.3 uV through the cans (this I know
@yahoogroups.com
Subject: [Repeater-Builder] UHF Duplexers
Just about finished with the Mastr II UHF repeater. I've run into a problem
with the duplexers. They are a set of WACOM BpBr Model WP678. I am putting
48W into them, but only 18.5W out. I believe this should be better. RX
will open
@yahoogroups.com
Sent: Saturday, September 19, 2009 6:30:57 PM
Subject: RE: [Repeater-Builder] UHF Duplexers
Terry,
Is your repeater in the 70cm Amateur band? If so, and your WP-678 duplexer
was not originally tuned for that band, that may be where the problem lies.
I have a Remec-Wacom WP-678
Hi all,
We are currently applying for a 7.6Mhz split UHF repeater here which
means we will be able to do away with the old and lossy large cavity
filters for our old 1.6Mhz split repeater and use a commercial unit.
We've already tried a loaned Procom duplexer and the results are most
promising
Hey there, you pay a little more for them, but the angle liniar
preamps are awesome. They come with a filter. Like i said, you pay
about twice the price of an ARR, but overall, it is a much much
better pre amp.
So many people just hook up a preamp. What good is it if you're
getting all
Remeber, there is a big difference between the 4 cavity mobile duplexer and
the 6 cavity set. I have obtained 95-100dB of notch with this type of
duplexer with a 5 MHz split, but that was the 6 cavity type. The 4 cavity is
not worth the powder to blow it to hell.
The safe amount of power is 25
At 01:34 AM 12/26/2007, you wrote:
We are currently applying for a 7.6Mhz split UHF repeater here which
means we will be able to do away with the old and lossy large cavity
filters for our old 1.6Mhz split repeater and use a commercial unit.
We've already tried a loaned Procom duplexer and the
At 12/26/2007 10:00, you wrote:
Remeber, there is a big difference between the 4 cavity mobile duplexer
and the 6 cavity set. I have obtained 95-100dB of notch with this type of
duplexer with a 5 MHz split, but that was the 6 cavity type. The 4 cavity
is not worth the powder to blow it to
I'm sorry, I meant to say when used as a duplexer, The 4 cavity model
is not worth the powder to blow it to hell.
I should also point out that the auction in question shows the sawed
off model and not the full 1/4 wave length version. A proper mobile
duplexer should have cavities 6 to 7 long. I
On Dec 26, 2007, at 2:31 PM, DCFluX wrote:
Here in Portland, Oregon we have group that has about 4-5 two meter
repeaters
all linked together. They seem to think they need that many
repeaters just to
cover the metro area. Their repeaters usually have TERRIBLE
sounding audio
and
Hi Nate-
You are correct, you don't know the situation. There are plenty of systems
that provide good metro coverage with 1 or maybe 2 repeaters here in
Portland.
Simply put, these people don't play nice. They often make their gain by
character assination, and have a lengthy record seen by
On Dec 26, 2007, at 5:39 PM, JOHN MACKEY wrote:
Simply put, these people don't play nice. They often make their
gain by
character assination, and have a lengthy record seen by several
people.
Too bad we can't vote 'em off the island, eh? :-)
The squelching problem is repeater
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