The calibration standard for S-meters that is usually quoted is
50 microvolts = S9. Likewise, 1 S unit represents a 6 dB change in
signal strength. However, this is far from universal. S meter
readings can vary widely from receiver to receiver and from band to
band on the same receiver. The only receivers that can be considered
truly calibrated are the multi-k-$ laboratory grade ones. Thus you
should consider most S meter readings as relative.
Great quote from Garth Brooks! Amen! 73, Bob WB2VUF
Randy and Cara Randall wrote:
>
> Hello. I am wondering if the S-meter reading is calibrated
> in
> standard S-units or is it an arbitrary scale? My set has
> most SW transmissions at S-60 to S-80. On my
> Drake SW2 with the same antenna S-20 to S-30
> maybe S-40 on the same station. Ideas? The manual
> does not mention the S-meter at all!
>
> Thanks,
> Randy.
>
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