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CX2SA > SATDIG 27.07.11 21:07l 100 Lines 2908 Bytes #999 (0) @ WW
BID : AMSATBB6399
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Subj: AMSAT-BB-digest V6 399
Path: IZ3LSV<IW0QNL<VE2PKT<ON0AR<HS1LMV<CX2SA
Sent: 110727/1903Z @:CX2SA.LAV.URY.SA #:18637 [Minas] FBB7.00e $:AMSATBB6399
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. ARISSat Article in EE Times (Bill Acito W1PA)
2. simplex/duplex terminology (W4ART Arthur Feller)
3. Good 70cm all mode radios for satellites (John Geiger)
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Message: 1
Date: Wed, 27 Jul 2011 13:43:11 -0400
From: "Bill Acito W1PA" <w1pa@xxxxxxx.xxx>
Subject: [amsat-bb] ARISSat Article in EE Times
To: <amsat-bb@xxxxx.xxx>
Message-ID: <BAY157-DS200F36AA2B08F25AF70CFB98350@xxx.xxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
http://www.eetimes.com/electronics-blogs/chips-in-space/4218140/The-Building-o
f-an-Amateur-Satellite-1
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Message: 2
Date: Wed, 27 Jul 2011 13:54:43 -0400
From: W4ART Arthur Feller <afeller@xxxx.xxx>
Subject: [amsat-bb] simplex/duplex terminology
To: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID: <D76FB6CF-D6A4-42D1-8F05-9EBF81FB1985@xxxx.xxx>
Content-Type: text/plain; charset=windows-1252
No need to guess or try to write new definitions. Here are definitions
accepted by all administrations around the world and included in the radio
regulations:
RR 1.125 simplex operation: Operating method in which transmission is made
possible
alternately in each direction of a telecommunication channel, for example,
by means of manual
control2.
RR 1.126 duplex operation: Operating method in which transmission is possible
simultaneously in both directions of a telecommunication channel2.
RR 1.127 semi-duplex operation: A method which is simplex operation at one
end of
the circuit and duplex operation at the other.2
2 1.125.1, 1.126.1 and 1.127.1 In general, duplex operation and semi-duplex
operation require two frequencies
in radiocommunication; simplex operation may use either one or two.
I hope this helps.
73, art?..
W4ART Arlington VA
http://afeller.us
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Message: 3
Date: Wed, 27 Jul 2011 13:43:33 -0500
From: John Geiger <aa5jg@xxxxxxx.xxx>
Subject: [amsat-bb] Good 70cm all mode radios for satellites
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID:
<CAFq43Lb9teCeVrxBbJR2zUUvSk6rMCYuB+p1x-v_bA+MQrTYDQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
What are some of the best 70cm all mode radios to use on the satellites? I
am looking for a monoband radio, not one of the HF/VHF/UHF radios as I have
the other bands covered already. I would like one that is plenty sensitive
on FM as well to receive the FM satellites.
73s John AA5JG
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End of AMSAT-BB Digest, Vol 6, Issue 399
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