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CX2SA > SATDIG 09.04.11 21:03l 423 Lines 14253 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Diplexer (Anthony Monteiro)
2. Re: Diplexer (Floyd Rodgers)
3. Re: Diplexer (Nigel Gunn G8IFF/W8IFF)
4. Re: Diplexer (Nigel Gunn G8IFF/W8IFF)
5. Re: Diplexer (Anthony Monteiro)
6. Re: Diplexer (N0JY)
7. Russian Hams Get Ready (Clint Bradford)
8. Re: Diplexer (i8cvs)
----------------------------------------------------------------------
Message: 1
Date: Sat, 09 Apr 2011 11:15:04 -0400
From: Anthony Monteiro <aa2tx@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Diplexer
To: amsat-bb@xxxxx.xxx
Message-ID: <201104091514.p39FE4QW062198@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Dear Friends,
Perhaps this will help clear up the confusion.
A "diplexor" is a passive device that lets you split
and/or combine signals based on their frequencies.
It does not matter whether the frequencies are close
together or on different bands nor does it matter if
you are using it for transmitting or receiving.
A diplexor is commonly used in radio and TV broadcasting
to allow two transmitters on different frequencies
to share the same antenna.
A "duplexor" is a device that allows both transmitting and
receiving over the same transmission line or antenna. It
may or may not be a passive device and it may or may not
be frequency selective.
In WWII RADAR systems, a duplexor was used to allow
the transmitter and receiver on the same frequency to
share the same antenna. The duplexor was a waveguide
device that had special gas-filled tubes to quickly
switch the signal direction.
A typical ham radio cavity duplexor is used in FM repeater
stations to allow the transmitter and receiver to share
the same antenna. Since it is a passive frequency-based
multiplexor, it is also a diplexor.
If you used the exact same device to instead connect
two transmitters to the same antenna, it would no longer
be a duplexor but it would still be a diplexor.
73,
Tony AA2TX
------------------------------
Message: 2
Date: Sat, 09 Apr 2011 10:28:00 -0500
From: Floyd Rodgers <kc5qbc@xxxxxx.xxx>
Subject: [amsat-bb] Re: Diplexer
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4DA07B00.7000702@xxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Well, I do not actually need ports for 220 and 900 "currently". I have
been looking at doing this for some time.
My current plan is to use stacked or series du/diplexors for the bands I
want to play (<30MHz, 50, 145, 430). Upper power limit is 500w pep which
makes it a little easier. If I pass the power limit, there is not much
question I must run separate feed lines. Adding 1296 and 2.4g also means
separate lines. (The entry panel to the shack is beginning to resemble a
cell tower entry panel since I have two towers fed from one panel. One
tower is hf/terrestrial <30-1296 stuff. The other is satellite
144,432,1296,2.4g)
------------------------------
Message: 3
Date: Sat, 09 Apr 2011 15:30:13 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: Diplexer
To: Anthony Monteiro <aa2tx@xxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4DA07B85.9080708@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
And its diplexer and duplexer.
On 09-Apr-11 15:15, Anthony Monteiro wrote:
> Dear Friends,
>
> Perhaps this will help clear up the confusion.
>
> A "diplexor" is a passive device that lets you split
> and/or combine signals based on their frequencies.
> It does not matter whether the frequencies are close
> together or on different bands nor does it matter if
> you are using it for transmitting or receiving.
>
> A diplexor is commonly used in radio and TV broadcasting
> to allow two transmitters on different frequencies
> to share the same antenna.
>
>
> A "duplexor" is a device that allows both transmitting and
> receiving over the same transmission line or antenna. It
> may or may not be a passive device and it may or may not
> be frequency selective.
>
> In WWII RADAR systems, a duplexor was used to allow
> the transmitter and receiver on the same frequency to
> share the same antenna. The duplexor was a waveguide
> device that had special gas-filled tubes to quickly
> switch the signal direction.
>
>
> A typical ham radio cavity duplexor is used in FM repeater
> stations to allow the transmitter and receiver to share
> the same antenna. Since it is a passive frequency-based
> multiplexor, it is also a diplexor.
>
> If you used the exact same device to instead connect
> two transmitters to the same antenna, it would no longer
> be a duplexor but it would still be a diplexor.
>
>
> 73,
> Tony AA2TX
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
--
Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937
825 5032
Amateur Radio G8IFF W8IFF (was KC8NHF 9H3GN), e-mail nigel@xxxxx.xxx
www http://www.ngunn.net
Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pigs QRP
Club International #385,
Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK 0182, MKARS, ALC,
GCARES, XWARN, EAA382.
------------------------------
Message: 4
Date: Sat, 09 Apr 2011 15:46:10 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: Diplexer
To: kc5qbc@xxxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4DA07F42.8090909@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I'm pretty certain you're going to be looking at something custom made.
At qrp powers it might not be a problem to DIY a set of filters but with
needing over 100dB of isolation between each
band it sounds expensive.
On 09-Apr-11 15:28, Floyd Rodgers wrote:
> Well, I do not actually need ports for 220 and 900 "currently". I have
> been looking at doing this for some time.
> My current plan is to use stacked or series du/diplexors for the bands I
> want to play (<30MHz, 50, 145, 430). Upper power limit is 500w pep which
> makes it a little easier. If I pass the power limit, there is not much
> question I must run separate feed lines. Adding 1296 and 2.4g also means
> separate lines. (The entry panel to the shack is beginning to resemble a
> cell tower entry panel since I have two towers fed from one panel. One
> tower is hf/terrestrial<30-1296 stuff. The other is satellite
> 144,432,1296,2.4g)
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
--
Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937
825 5032
Amateur Radio G8IFF W8IFF (was KC8NHF 9H3GN), e-mail nigel@xxxxx.xxx
www http://www.ngunn.net
Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pigs QRP
Club International #385,
Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK 0182, MKARS, ALC,
GCARES, XWARN, EAA382.
------------------------------
Message: 5
Date: Sat, 09 Apr 2011 12:04:32 -0400
From: Anthony Monteiro <aa2tx@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Diplexer
To: amsat-bb@xxxxx.xxx
Message-ID: <201104091603.p39G3Iuk066087@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Yes Nigil, I need a spell checker on my email.
Thanks!
Tony AA2TX
At 11:30 AM 4/9/2011, Nigel Gunn G8IFF/W8IFF wrote:
>And its diplexer and duplexer.
------------------------------
Message: 6
Date: Sat, 09 Apr 2011 11:40:53 -0500
From: N0JY <n0jy@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Diplexer
To: N8GBU <n8gbu@xxxxxxxxxxxxxxx.xxx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <4DA08C15.80406@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Mike,
I have used such a setup for some time now, I have a 2m/70cm diplexer at
my desk and one at the antennas, so that I can use one feed line
(LMR-600). I also switch the heck out of the feeds with several coax
relays in order to achieve different satellite modes as well as put the
radios on my terrestrial vertical. I acquired the relays and diplexers
over the years at hamfests and online auctions, I think I bought a
diplexer or two new also.
The article you may be referring to was in the May 2010 QST, by Steve
Ford WB8IMY. If you don't have that QST issue, you can view it online
at ARRL if you are a Diamond Club member.
You can see a few pictures on the Satellite Antennas page of my website,
http://n0jy.org. On that page there is also a link to a PowerPoint
presentation of the whole antenna switching scheme. That will show you
a bit about the use of the diplexers.
My experience in using this setup has been positive, I have no empirical
data about signal loss or comparisons to what it was like before I went
to one feedline. The cables prior to the switch were RG-8 and Belden
9913 anyway, so comparing to LMR-600 wouldn't be apples to apples. It
just works good. I've had no problems with signal strength both up and
down, and make all of the contacts I wish to.
73,
Jerry
N?JY
On 4/8/2011 8:59 PM, N8GBU wrote:
> I was wondering if anyone has scene the article about using a diplexer (I
> think that's the right name) on both ends for a satellite setup? One where
> the two antennas are then a single feed then another one to split things up
> again by the radio. I think it was in QST but can't remember the issue or if
> someone has used that setup I would like some input ......Thanks and 73's
>
>
>
> Mike N8GBU
>
>
__________ Information from ESET NOD32 Antivirus, version of virus signature
database 6028 (20110409) __________
The message was checked by ESET NOD32 Antivirus.
http://www.eset.com
------------------------------
Message: 7
Date: Sat, 09 Apr 2011 09:52:13 -0700
From: Clint Bradford <clintbradford@xxx.xxx>
Subject: [amsat-bb] Russian Hams Get Ready
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID: <75569A84-8371-4813-BC4A-145572D364B1@xxx.xxx>
Content-Type: text/plain; CHARSET=US-ASCII
Excuse the clumsy translation from Russian to English ...
Hams at Baikonur will celebrate the 50th anniversary of the flight of Yuri
Gagarin
08/04/2011
Celebration launch manned spacecraft "Vostok-1 caused a wide resonance in
morse movement in many countries.
In Roskosmos received numerous requests from the Russian and Kazakh radio to
conduct expeditions to Baikonur
Cosmodrome for a broadcast on amateur radio shortwave (HF) bands.
>From 7 to April 14 at the Baikonur Cosmodrome to organize an expedition of
Russian and Kazakh radio. In this period,
the HF carrier rocket will be spoken Russian and Kazakh anniversary amateur
radio call sign, devoted to the first
human spaceflight: R50KEDR (Cedar); R50SK and UP50SK (Sergei Korolev), as
well as R50YG and UP50YG (Yuri Gagarin).
Work on the air will be from 5 jobs:
- "Gagarin's Start" (site 1) callsign R50KEDR (Cedar) on April 12 from 9
hours 18 minutes Moscow time during the
108 minutes on the amateur bands 30 and 20 meters, radio frequency are close
to the frequencies of the spaceship
"Vostok-1" (9.019 and 20.006 MHz);
- Test item number 1 (site 18) and callsigns R50SK R50YG from 7 to 14 April
on the bands 80, 40, 20, 15 and 10 meters;
- Rf (site 5) and callsigns R50SK R50YG from 8 to 14 April on the bands 160,
80, 40, 20, 15 and 10 meters;
- Test item number 5 (site 23) callsign UP50SK from 10 to 11 April on the
bands 80, 40, 20, 15 and 10 meters;
- The city of Baikonur (pl. 10) callsign UP50YG from 8 to 11 April on the
bands 80, 40, 20, 15 and 10 meters.
April 9-10, Kazakh and Russian teams will take part in competitions in
relation to the HF at "Cup of Yuri Gagarin.
- Press Service of the Russian Space Agency
------------------------------
Message: 8
Date: Sat, 9 Apr 2011 19:34:38 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: Diplexer
To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>, "Anthony Monteiro"
<aa2tx@xxxxxxx.xxx>
Message-ID: <006501cbf6dc$671d42c0$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Anthony Monteiro" <aa2tx@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Saturday, April 09, 2011 5:15 PM
Subject: [amsat-bb] Re: Diplexer
> A "duplexor" is a device that allows both transmitting and
> receiving over the same transmission line or antenna. It
> may or may not be a passive device and it may or may not
> be frequency selective.
>
> In WWII RADAR systems, a duplexor was used to allow
> the transmitter and receiver on the same frequency to
> share the same antenna. The duplexor was a waveguide
> device that had special gas-filled tubes to quickly
> switch the signal direction.
>
> 73,
> Tony AA2TX
>
Hi Tony, AA2TX
I have in my hands the Instruction Book for Radar Recognition
Sets AN/UPX-6 of U.S. Navy Department Bureau of Ships.
The UPX6 is a IFF transponder on board of aicrafts and was used
in WWII for Identification of Friend or Foe.
The UPX-6 can transmit from 1010-1030 MHz and receive from
1090-1110 MHz and allows both transmitting and receiving over
the same transmission line and antenna via a circuit made of coax
cable RG-58/CU that the manual calls a "DUPLEXER" and not
a "duplexor".
This "duplexer" is working on the fact that a transmission line,
shorted at the far end a quarter wavelenght long for the incoming
signal,represent infinite impedance (an open circuit) at the sending
end of the line.
The UPX-6 was converted in the early 1980's to be used on 1296 MHz
and an interesting article written by W6NBI was published in Ham
Radio Magazine march 1981
I modified it and I got 40 watt output.......not too bad for that epoch
time !
Best 73" de
i8CVS Domenico
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 6, Issue 196
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