If i remember correctly (Peter G3RZP will probably corect me anyway) it was
Roly Shears
G8KW - who founded KW Electronics -that proposed that S9 be set at 50uV and
that each S
unit would be 6dB. For what its worth.
John ZS5JF
----------
> From: Tom Rauch <w8ji@contesting.com>
> To: amps@contesting.com; Radio WC6W <wc6w@juno.com>
> Subject: Re: [AMPS] S units
To: <amps@contesting.com>
> Date: 13 July 1999 03:13
>
>
> About 3-4 dB is more common than about six dB, so your
> Kenwood looks good.
>
> Now for something to think about. One of the question for getting a
> license is how many dB is an S unit. No where, in any reference
> standard I've been able to find, is it listed as six dB. Very few if any
> receivers use six dB, and most never even tried. The most common
> values "tried for" are around five dB or less.
>
> The correct answer for that question would be "what ever it winds
> up at".
>
> > For what it is worth... here are this morning's measurements, in the S
> > unit department, made on my well aged Kenwood TS-440, with a HP8640B
> > source. I didn't measure S1 as this is almost the resting point of the
> > meter.
> >
> >
> > Signal level (dBm) Meter Reading
>
> > -100 S2
> > -87 S5
> > -78 S7
> > -73 S9 (note: right on the traditional 50uV point!)
>
> 73, Tom W8JI
> w8ji@contesting.com
>
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