Reg Edwards wrote:
Let this little anecdote be a friendly warning to they who use meters
with a 0 to infinity SWR scale, or scaled in terms of forward and
reverse power.

If the scale were linearly calibrated for |rho| = 0 to 1,
would you still be objecting?

SWR = (1+|rho|)/(1-|rho|) for 0 = |rho| = 1

When SWR = infinity, it doesn't mean infinite current
through the meter. It just means that Vref = Vfor
where |Vref|/|Vfor| = |rho|. My Heathkit HM-15 allows
for full scale to equal Vfor. Then Vref is applied.
The scale is a linear indication for |rho|. The
corresponding SWR scale just follows the above equation.
--
73, Cecil http://www.qsl.net/w5dxp