I've heard the 6dB per S unit figure in conversations for years, but I've never seen it written in any authoritative source. However, I note that Collins receivers from the 50s and 60s, having S meters marked in both dB and S units, seem to indicate that 3 S units = 10 dB, equivalent to a nice round 3.33 dB per S unit.

Bob K4ERR

Ken Kopp wrote:
In my 56 years of hamming I've always thought the "standard" was/is
6 db, but I can't site anything support this.

We Yanks have always resisted the "world order" when it comes to
measurements ..... Lessee, the last I knew it was just us and Libya
holding  out ...

73! Ken Kopp - K0PP
[EMAIL PROTECTED]

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