I DID however, at around the same time, own a 2 meter Jap all-mode
transceiver that I happened to measure the "S" meter accuracy with an HP
signal generator. It turned out that 2 uVolts was "S"-1. THREE uVolts was
"S"-9.
==============================
Is it correct that for frequencies up to 30 MHz a S9 signal is 50
microvolt into 50 Ohms (or -73 dBm) but that for higher frequencies a
S9 signal is 5 microvolts into 50 ohms (or -93 dBm).
If that is (the agreed) norm ,was it ever formally sanctioned by IARU ?

I can hardly believe that any of the far eastern rice boxes have a
properly calibrated S-meter. Also the top end of the S-meter scale is
usually rather 'compressed', which surprises me since ICs with a log
type input/output relationship must be readily available.

Time to attempt calibrating the S-meter of my (almost vintage) TenTec
Paragon TRX.


Frank GM0CSZ / KN6WH