[Moon] Septum focal position

[rosshannah at xtra.co.nz]

Hi Philippe,
I made a bracket on which the feed could slide  backwards and forwards. I chose a mid point for support legs.
73
Ross ZL1EME

On 3 July 2018 22:00:01 GMT+12:00, moon-request at moonbounce.info wrote:
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>   1. OK1dfc septum focal position. (Philippe Mondon)
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>----------------------------------------------------------------------
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>Message: 1
>Date: Mon, 2 Jul 2018 21:32:01 +0400
>From: Philippe Mondon <phil.m974 at gmail.com>
>To: moon at moonbounce.info
>Subject: [Moon] OK1dfc septum focal position.
>Message-ID:
>	<CADiTpTz5ANAwujwTNAT4fUCtsMG7OjJbv0icynpxuV-EXYGBPw at mail.gmail.com>
>Content-Type: text/plain; charset="UTF-8"
>
>Hallo All,
>
>Still working on the 23cms setup here.
>
>The dish that i have is a TVRO SX-12 by Orbitron (as far as i know). I
>have
>different pdf for that dish and the data given for the diameter range
>from
>3.56 to 3.60m and F/D 0.36, but after assembling the dish i see 3.6m
>diameter and depth of 60.5cm which makes it F/D of 0.37.
>
>Focal point with figures above, vary from 127 to 133cm...
>
>Did TRVO users had the exact values on their own reflector  from what
>the
>paper says?
>
>Also, i have read, i can't remember where, that the focal point for the
>septum is some 5cm inside the mouth. Was that the case for most of you?
>
>With 6cm difference on focal point (127-133), that makes a difference
>on
>the lengths of the 4 legs support on the septum, and i am working on
>that
>now...
>
>Any feedback appreciated.
>
>Tks and hope to get RX qrv soon ;-)
>
>Vy73 - Phil - FR5DN
>
>
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