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Re: AiDC-3733



Albrecht:

I have a 3733. It has a 12V regulator inside and requires at least 13.5 or
more to work properly. To be safe, feed it 15V and it should work just fine.

Also, I didn't have very good results when mounted on my parabolic grid
antenna with its dipole. After obtaining an N adapter from K5GNA, and
cabling directly to the feed assembly that came with my dish (Philips-Tech
SPG-36), I found it worked at least as well or possibly a bit better than
the Down East Microwave converter.

As for calibrating against the sun -- the easiest method I've found is to
set your rotators to where the sun should be, then adjust the antenna so the
shadow from the feed assembly falls exactly at the center of the antenna.
Obviously you have to be quick about this so the sun doesn't move too much.

Good luck.

Art, N3OY

----- Original Message -----
From: Albrecht von Hessberg <avhessberg@foni.net>
To: <amsat-bb@AMSAT.Org>
Sent: Saturday, May 05, 2001 9:43 AM
Subject: [amsat-bb] AiDC-3733


> Hello to all,
> I am using an  AiDC-3733 converter mounted at a 80 cm dish, but I hear
> nothing from AO-40 beacon.
> I neither can hear the sun's noise. I am wondering why. The supply voltage
> is only 12 Volts. Should it be higher? In the data sheet is more than 15
> Volts noted.
> How many dB noise could I expect from the sun relative to the noise from
> other directions?
> I wanted to use the sun's signal to find the exact focus of the dish.
> Thanks in advance.
> Albrecht von Hessberg DF 9 LC
>
> ----
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