An additional 20dB of isolation can be realized by replacing the
antenna Tee connector with a circulator. Port A to B tuned to the TX
frequency, Port B to C tuned to the RX frequency. Connect TX to port
A, antenna to B, Receiver to C.
I'm using a set of WP-639 and with this setup I am seeing
23:08:38 2010
Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question
The PLL exciter is why you're having such good success running a 4-cavity
duplexer. If you had a PM exciter, chances are you'd be experiencing
desense. The PLL exciter produces about 22 dB less noise at 600 kHz
-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Wacom WP-639
Duplexer question
An additional 20dB of isolation can be realized by
replacing the
antenna Tee connector with a circulator. Port A to
B tuned to the TX
frequency, Port B to C tuned to the RX frequency.
Connect TX to port
KNAPP nkn...@twowayradio.net
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, September 09, 2010 3:04 AM
Subject: Re: [Repeater-Builder] Wacom WP-639 Duplexer question
Oh drat! I thought I was getting away with something :-)
I am about to start on a 6m mastr ii with 1 meg split
WACOM hasn't been in business for some years now. Good luck contacting them
directly!
-Original Message-
From: Richard Kelly
Sent: Sep 8, 2010 9:18 PM
To: repeater-builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question
Good evening Eric
/duplexers.html
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of
larryjspamme...@teleport.com
Sent: Thursday, September 09, 2010 11:04 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question
WACOM
Hodell
Sent: Sep 9, 2010 11:10 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question
WACOM was bought out my Telewave and there tech support staff is very helpful…
http://telewave.com/
You can cross reference your older Wacom cavities
What repeater are you running? Is it a GE Mastr II by chance?
Andy
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of RichardK
Sent: Wednesday, September 08, 2010 3:11 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Wacom
At 03:11 PM 9/8/2010, RichardK wrote:
Good evening, our club has a Wacom WP-639 four can duplexer as part
of our repeater system. Input Fq is 147.915 and Output Fq is
147.315. We have a 600kHz (+) offset. Very simply, our main problem
is when we run the transmitter at full power 100 watts,
At 04:38 PM 9/8/2010, Andrew Seybold wrote:
What repeater are you running? Is it a GE Mastr II by chance?
---You hinting at the issue of Mastr II amp going spurious when the
power is turned down too far?
Ken
--
i'm at work right now--I will get that info tomorrow!!
Rich K
W2RRK
x
To: Repeater-Builder@yahoogroups.com
From: aseyb...@andrewseybold.com
Date: Wed, 8 Sep 2010 16:38:49 -0700
Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question
What repeater are you running
On 9/8/2010 6:11 PM, RichardK wrote:
Good evening, our club has a Wacom WP-639 four can duplexer as part of our
repeater system. Input Fq is 147.915 and Output Fq is 147.315. We have a
600kHz (+) offset. Very simply, our main problem is when we run the
transmitter at full power 100
I'm not surprised- you're asking too much of a duplexer that has four 5
cans. According to my CommShop program, a duplexer with an 80 dB spec is
more suitable with transmitter power in the 10-15 watt range, assuming a
solid-state PA and a receiver sensitivity around 0.35 uV at 12 dB SINAD. On
a
To: Repeater-Builder@yahoogroups.com
From: wb6...@verizon.net
Date: Wed, 8 Sep 2010 18:10:44 -0700
Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question
I'm not surprised- you're asking too much of a duplexer that has four 5
cans. According to my CommShop program, a duplexer
At 06:18 PM 9/8/2010, Richard Kelly wrote:
We will be trying other things such as adding a second ground rod
outside the shack instead of the single one we use now. We will
also try isolating the amp some more and replacing the coax feed
line with hard line.
--That is a complete waste
it.
73,
Mike
WM4B
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Richard Kelly
Sent: Wednesday, September 08, 2010 9:19 PM
To: repeater-builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question
I'm afraid your wasting your time. According to the document for the
Wacom 639 duplexer, this is what it says:
MIN. FREQ. SPACING: 600 KHz
POWER: TO 200 WATTS
Notice that it says TO 200 watts. That would be if you were at 2MHz
of spacing or more. You are only at 600KHz spacing, so you
From: ah...@ah6le.net
Date: Wed, 8 Sep 2010 18:24:41 -0700
Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question
At 06:18 PM 9/8/2010, Richard Kelly wrote:
We will be trying other things such as adding a second ground rod
outside the shack instead of the single one we use now
At 9/8/2010 18:24, you wrote:
At 06:18 PM 9/8/2010, Richard Kelly wrote:
We will be trying other things such as adding a second ground rod
outside the shack instead of the single one we use now. We will
also try isolating the amp some more and replacing the coax feed
line with hard
@yahoogroups.com
To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com
Sent: Wed Sep 08 20:10:44 2010
Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question
I'm not surprised- you're asking too much of a duplexer that has four 5
cans. According to my CommShop program
Rich,
The short answer is: You need to find a bigger duplexer. Four 8 cans
would work well such as a Wacom WP-641. You could simply call and order
one if Wacom was still in business. (RIP) Unfortunately Tx/Rx bought
them years ago for the name and to quash competition. They can be found
At 08:21 PM 9/8/2010, n...@no6b.com wrote:
Replacing copper-braided coax with RG-214 or hardline is hardly a waste of
time.
--Notice I said:
More grounding and replacing coax with hardline (unless your coax
isn't doubleshield to start with) will buy you nothing.
I was assuming he wasn't
-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of NORM KNAPP
Sent: Wednesday, September 08, 2010 11:38 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Wacom WP-639 Duplexer question
I got a set of 4 sinclair cans
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