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CX2SA > SATDIG 18.11.13 21:03l 98 Lines 2834 Bytes #999 (0) @ WW
BID : AMSATBB8396
Read: GUEST
Subj: AMSAT-BB-digest V8 396
Path: IZ3LSV<IK2XDE<ON4HU<CX2ACB<CX2SA
Sent: 131118/2002Z @:CX2SA.SAL.URY.SA #:687 [Salto] FBB7.00e $:AMSATBB8396
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. LVB Tracker production run? (Ken Swaggart)
2. Re: AO7 calibration (Alan)
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Message: 1
Date: Mon, 18 Nov 2013 11:35:31 -0800
From: "Ken Swaggart" <k.swaggart@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] LVB Tracker production run?
Message-ID: <5F8B79CD42D94601AF86076DBC9E6042@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
I've been watching the Amsat store for the LVB tracker for the last month or
two and it hasn't been listed. Any guess on when there will be another
production run?
73,
Ken, W7KKE
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Message: 2
Date: Mon, 18 Nov 2013 13:43:54 -0600
From: Alan <wa4sca@xxxxx.xxx>
To: "'Bob- W7LRD'" <w7lrd@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Cc: CC <APBIDDLE@xxxxxx.xxx>
Subject: [amsat-bb] Re: AO7 calibration
Message-ID: <2D6F7EADA99742A2A20D3F460872CD3F@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Hi Bob,
There are many reasons why the transponder "constant" varies somewhat. The
temperature of the
satellite is somewhat dependent on sun angle, periods of eclipse, etc. This
usually results in a slow
seasonal variation, most frequently seen in SSB satellites, but also in some
cases in the FM birds.
In the case of AO-7 there is no battery to stabilize the voltage, so at some
(most?) times the 39 year
old arrays may not provide enough power for a completely stable output. I
recall an article on the
subject in the AMSAT Journal, though I don't have it handy.
73s,
Alan
WA4SCA
<-----Original Message-----
<From: amsat-bb-bounces@xxxxx.xxx
<[mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of Bob- W7LRD
<Sent: Monday, November 18, 2013 11:00 AM
<To: amsat-bb@xxxxx.xxx
<Subject: [amsat-bb] AO7 calibration
<
<Hello...More often than not I have to "adjust" the up link
<calibration on satpc32 in order to accurately track the sat.
<It is not always the same adjustment, it can vary from a few
<cycles to as much as 2.5 khz. Given AO-7 is a grand old lady,
<is she just being temperamental, or do I have an issue
<(operator error).
<73 Bob W7LRD
<_______________________________________________
<Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of
<the author.
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<satellite program!
<Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
<
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_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
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End of AMSAT-BB Digest, Vol 8, Issue 396
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