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Re: Orbit 250 apogee



They aren't even 6 dB with nothing in front. No S-meter should be relied
upon for "dB per S-unit".  They are a good relative measure and with a
calibrated attenuator (like the 70 buck MFJ), you can make very accurate
measurements (for amateur work).

S-meters change from band to band in the same radio. They change across
radios. They are nothing but a "relative" strength meter, but they are
useful, is used properly.

I got a charge out of the Excel spreadsheet trying to specify the S-units of
the main beacon...that's cute, but hopelessly wrong. Fortunately, if you
move your cursor on the graph, you can see the actual signal level in dBm
and simply subtract that from the MDS value and you will know the number of
dB that you will hear the MB above the noise level.

73...hasan
----- Original Message -----
From: "Jesse Morris" <w4mvb@juno.com>
To: <topcat@mail1.stofanet.dk>
Cc: <amsat-bb@AMSAT.Org>
Sent: Thursday, May 17, 2001 8:09 PM
Subject: Re: [amsat-bb] Orbit 250 apogee


> If anyone in this forum thinks that S-meter reading are 6db each with all
> the converters and preamps ahead of the receiver they are kidding
> themselves!
>
> 73's de Jess - W4MVB
> ----
> Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
>

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