Hi Mike.
Full duplex is where you can receive the signal from the satellite at the same
time as you are transmitting up to it.
It allows you to hear your own signal through the satellites transponder. So
you know if your signal made it, or if it was submerged under someone else who
was transmi
Hi Mike,
Full duplex is pretty simple: Listening to the downlink (receive) while
*simultaneously* transmitting on the uplink. This enables you to hear you
transmission WHILE YOU ARE TRANSMITTING - at the same time.
There are a lot of benefits behind operating this way, the main one being
red
Hi Mike,
Consider these:
-Full Duplex is receiving and transmitting at the same time, typically on
different frequencies (bands).
-When working satellites in this mode, you are doing the same thing as their
transponder is :-)
-When you hear your / another signal in the receiver, presuming it an
A link is FULL DUPLEX if you and the other station are both receiving
and transmitting simultaneously.
It is HALF DUPLEX if you can both receive and transmit but NOT
simultaneously (as on your local FM repeater or a packet satellite link).
It is SIMPLEX if you can receive OR transmit but not bot
And knowing whether or not you're hitting the bird at all...
73 Jeff WB2SYK FN13xc Syracuse
Sent from Yahoo! Mail on Android
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Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author.
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Hi Mike,
Others have answered the question quite well. One additional point I'd like to
make is how important it is to actually listen to your yourself on the
downlink,
for a couple reasons.
1. On an FM bird, if you can't hear yourself or you hear a double... Stop
transmitting
2. On a linear
Mike,
It depends on the transceiver that you have.
Essentially the up link and down link are using different bands, U and V for
example.
If you transmit on a V uplink your transmission is transmitted back on the
downlink on a U frequency.
If your transceiver is capable of duplex operation, you c
To me, operating full duplex is like talking on the telephone. I don't hesitate
to interrupt while the other person is talking to ask a question or just add
something to the subject. Four persons in a full duplex round table can chat
like sitting at a real wood round table. It's fun.
Mike, K9QH
2m on your local repeater is simplex as you talk then listen. Your telephone is
full duplex as you can talk but still hear the other person.
Tom NY4I
PS Did you really mean full Doppler?
On Jul 27, 2011, at 9:23 AM, "Lowell White" wrote:
> Hi Mike,
>
> Consider these:
>
> -Full Duplex is
No it's not.
2m on your local repeater is half duplex, where you can talk or listen
but not both simultaneously.
Simplex is where you can talk OR listen but never do both.
On 07/27/2011 02:43 PM, Thomas Schaefer wrote:
> 2m on your local repeater is simplex as you talk then listen. Your telephon
4X1DG" <4x...@iarc.org>
To: "Mike" , amsat-bb@amsat.org
Sent: Wednesday, July 27, 2011 5:51:26 AM
Subject: [amsat-bb] Re: Full Duplex?
Mike,
It depends on the transceiver that you have.
Essentially the up link and down link are using different bands, U and V for
exampl
Not exactly.
Full Duplex can be both receive and transmit simultaneously in the same band or
on the same frequency.
Doesn't have to be in different bands.
Sigil wrote:
>
> Everyone seems to agree on the meaning of "Full Duplex" as the term is
> used when talking about Ham satellites and radio
Nigel Gunn G8IFF/W8IFF wrote:
> Not exactly.
> Full Duplex can be both receive and transmit simultaneously in the same
> band or on the same frequency.
> Doesn't have to be in different bands.
>
>
Nigel,
Yes, of course, that's true. A single band repeater is a full duplex radio.
I don't think
There are plenty of commercial receiver/transmitter pairs but they all need
external filtering.
I don't know of any amateur transceivers that fall into that category.
Sigil wrote:
>
>
> Yes, of course, that's true. A single band repeater is a full duplex radio.
>
> I don't think their are any
At least "their" is a proper word.
Sheesh isn't in the dictionary.
Sil - ZL2CIA wrote:
>
> > Nigel,
> >
> >
> > Yes, of course, that's true. A single band repeater is a full duplex
> radio.
> >
> > I don't think their are any Ham radios that operate full duplex in a
> > single band. Of co
Sorry here is the Link
http://www.wouxun.com/Two-Way-Radio/KG-UVD1.htm
Howard
From: Howard Kowall
To: AMSAT-BB@amsat.org
Sent: Tuesday, June 09, 2009 9:58 PM
Subject: Full Duplex HT's
Hello to all
Just a follow up to the posting of full duplex handhelds
Came across this ht,that
A couple or three years ago there was an influx of h/t's into the UK via
e-bay with origins in China - I believe they were marketed under the
name JingTong (I kid you not)
If I recall correctly, they were so bad and caused so much interference
that eventually the Regulatory Authority stepped in
On Wed, 2009-06-10 at 14:39 -0400, David - KG4ZLB wrote:
> A couple or three years ago there was an influx of h/t's into the UK via
> e-bay with origins in China - I believe they were marketed under the
> name JingTong (I kid you not)
>
> If I recall correctly, they were so bad and caused so muc
At 07:09 AM 6/11/2009, Gordon JC Pearce wrote:
>I actually have one of the JT-308s, and found it to be not too bad.
>It's a bit deaf and it has not got the cleanest output but there are no
>particular nasties in the output. A VX-7 is worse!
I have one also. Biggest problem I found was that when
The tone may well have been clean but was certainly much too loud. There's
usually a level pot you can adjust.
Tony Langdon wrote:
> I have one also. Biggest problem I found was that when I enabled
> CTCSS, it put this loud rumble onto the audio. Sounded like I was
> mobile. Certainly wasn'
On Thu, 2009-06-11 at 12:13 +1000, Tony Langdon wrote:
> At 07:09 AM 6/11/2009, Gordon JC Pearce wrote:
>
> >I actually have one of the JT-308s, and found it to be not too bad.
> >It's a bit deaf and it has not got the cleanest output but there are no
> >particular nasties in the output. A VX-7 i
Joe,
I have email in to Radio Mart about that. Their HT line gets generally
good reviews based on value/$ but with the caveat that they are not on a par
with Kenwood, Yaesu, and Icom WRT features and often performance. Still,
looks interesting.
Alan
WA4SCA
-Original Message-
From: a
"'AMSAT-BB'"
Sent: 8/21/12 5:44 AM
Subject: [amsat-bb] Re: Full Duplex radio?
Joe,
I have email in to Radio Mart about that. Their HT line gets generally
good reviews based on value/$ but with the caveat that they are not on a par
with Kenwood, Yaesu, and Icom WRT featur
x27;Gary "Joe" Mayfield'" ; "'AMSAT-BB'"
Sent: 8/21/12 5:44 AM
Subject: [amsat-bb] Re: Full Duplex radio?
Joe,
I have email in to Radio Mart about that. Their HT line gets generally
good reviews based on value/$ but with the caveat that they are not
iginal Message-
> From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
> Behalf Of Greg Dolkas
> Sent: Tuesday, 21 August, 2012 18:05
> To: apbid...@mailaps.org; 'Gary Joe Mayfield'; 'AMSAT-BB'
> Subject: [amsat-bb] Re: Full Duplex radio?
>
Hi Greg!
I'm guessing it lost something in translation, but what exactly are the
> Stun and Kill features
>
Stun and Kill are functions normally used in commercial
two-way radios. These functions allow a radio to be remotely
disabled. Other radios have a "revive" function, which
allows a disable
From: "Patrick STODDARD (WD9EWK/VA7EWK)"
To:
Sent: Wednesday, August 22, 2012 12:24 AM
Subject: [amsat-bb] Re: Full Duplex radio?
Hi Greg!
I'm guessing it lost something in translation, but what exactly are the
Stun and Kill features
Stun and Kill are functions normally us
Well, I guess that would make sense too. Thanks Patrick, I'd never heard
of that before.
So, what exactly is their target market for these things? I may not be
confused anymore, but I think they still might be.
Greg KO6TH
On Tue, Aug 21, 2012 at 10:24 PM, Patrick STODDARD (WD9EWK/VA7EWK) <
Greg,
> Well, I guess that would make sense too. Thanks Patrick, I'd never heard of
> that before.
>
> So, what exactly is their target market for these things? I may not be
> confused anymore, but I think they still might be.
Since these newer Chinese-made radios come to the US market with FCC
Hi Nigel
> Full Duplex can be both receive and transmit simultaneously
> in the same band or on the same frequency.
There will be very few radios I guess that can at the same time
receive as well as transmit on the same band / frequency ...
At least my THD7 and TS2000 can do full duplex, but not
Howard - Tell "your friend" to stay away from Chinese crap and
purchase products approved by the governing boards of his own country.
Sorry for the attitude ... But China owns way to much of my country,
and all they produce is inferior crap that U.S. citizens eat up at Wal-
Mart and similar r
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Clint Bradford wrote:
> Sorry for the attitude ... But China owns way to much of my country,
> and all they produce is inferior crap that U.S. citizens eat up at Wal-
> Mart and similar retailers. There are plenty of amateur radio
> manufacturers
If I understand your wiring, I think you have it correct.
Is this what you are trying to do?
http://www.amsat.org/amsat-new/articles/Mode-J/
Note that for mode-B satellites where you are transmitting on 70cm and
receiving on 2m, this won't work. In my experience, the extra filtering
is also
not had
problems when I tried it using FT817 and a Yesau handheld.
Dave
WB7DRU
Minnesota
Sent from my android device.
-Original Message-
From: Greg D
To: Robert Coppock
Cc: amsat-bb@amsat.org
Sent: Sat, 02 Jun 2012 12:07 PM
Subject: [amsat-bb] Re: full duplex w/ 2 HT's
y.net
> To: ko6th.g...@gmail.com; robertinor...@webtv.net
> CC: amsat-bb@amsat.org
> Subject: [amsat-bb] Re: full duplex w/ 2 HT's
>
> I am not sure that the filtering from the small duplexer with the Arrow is
> significant enough compared with the injection loss that it w
On 02/06/12 17:33, Robert Coppock wrote:
hola, i am trying to determine the best way to work full duplex on the birds
with 2 HT's or radios. i cannot find any info so far on the web. my concern
is to keep the transmit power out of the receive radio, i guess basically the
difference bet
Robert:
I have used a duplexer on the UHF side of my satellite ops for several
years. I find that some radios have more of a desense problem than
others. Here is a link to my website where I briefly talk about what I
do on portable ops and using what is referred to as a Mode J filter -
http
So, all the on-line information seems to point to this solution -
putting a diplexer (filter) on the 70cm side to tap off and absorb the
incoming 2m signal. Isn't there also a design where one puts a filter on
the 2m side, to tap off and absorb the 70 cm (3rd harmonic of 2m) signal?
I would th
Usually the diplexer as a filter is only needed to keep the 2m tx from
overloading a 70cm preamp. For a two radio setup with no preamp, it usually
isn't needed at all.
73, Drew KO4MA
Sent from my iPhone
On Jun 3, 2012, at 10:45 PM, Greg D wrote:
> So, all the on-line information seems to poi
My portable setup using an arrow antenna doesn't use a diplexor or duplexor.
With the setup for 2m uplink, I connect my VX5R to the two meter driven element
with a piece of RG-8X.
I connect my Icom IC R10 to the 432 mhz driven element with another piece of
RG-8X. Just turn the radios on,
adjus
Great work, Andrew.
If you have the capacity, maybe we can submit specific programming
instructions for working the birds on each of those radios, and ofer
it on your site. Might be as simple as snipping a couple pages as .pdf
from the owners manual ...
Clint Bradford, K6LCS
909-241-7666
Partially sorry about my tirade last night. I am just sick of those
hams who are cheapskates, and love their "bargains" that they find
from questionable sources ... no matter whether or not the equipment
carries an FCC ID number or not.
The use of such illegal equipment demeans us all.
Just
On 08/04/11 20:09, Bill W1PA wrote:
> Do any of the current or classic "satellite" HT's (FT-51R, IC-W32A, etc)
> allow you to create a single channel with a FM bird rx/tx pair in full
> duplex?
IIRC, the IC-32A/AT/E does, but it's been a long long time since I used
one in that manner...
73s
I can't comment on the various HT's but I would think that you'd want the TX
freq in memory and the RX freq on vfo. That's how I use my TH-F6A (not a
full duplex HT).
Jeff Moore -- KE7ACY
CN94
- Original Message - From: "Bill W1PA"
Do any of the current or classic "satellite" HT's (
Bill,
The Alinco DJ-G7 is full duplex and has 100 cross band memory channels that
can do Satellites. You can setup 5 memory channel pairs to cover first
approach, near approach, Closest position, near departure, far departure.
Then just click through the memories as the satellite passes. Another D
The Alinco DJ-G5 will do so. I think that the Yaesu FT-470 did too, but
it's been so long since I owned that radio that I can't say for certain.
George, KA3HSW
- Original Message -
From: "Bill W1PA"
To:
Sent: Friday, April 08, 2011 2:09 PM
Subject: [amsat-bb] Full Duplex as a Singl
-Original Message-
From: Don Ferguson
To: amsat-bb
Sent: Sat, Apr 9, 2011 12:08 am
Subject: [amsat-bb] Full Duplex as a Single Channel on a HT
Do any of the current or classic "satellite" HT's (FT-51R, IC-W32A, etc)
llow you to create a single channel with a FM bird rx/tx pair in full
Well said..
But, 'know it all's' here on the AMSAT board?nah...never happen
TK, K7TRK
-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Clayton Coleman W5PFG
Sent: Saturday, January 21, 2012 5:45 PM
To: AMSAT
Subject: [amsat-bb] Full
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