--- In ultralightdx@..., "Dennis Gibson" <wb6tnb@...> wrote:
It's been my experience that the sensitivity of the SRF-59 is related
to battery voltage level. At one point, I too thought something had
happened to my SRF-59 as it had become "less-sensitive". Turned out my
battery voltage was down to 1.23v. Replacing the battery solved the
problem; i.e. the SRF-59's sensitivity was fully restored.
Typically, NiMH and NiCad batteries are rated at 1.2 volts although
they may be a bit higher immediately after a charge. Akaline batteries
are rated at 1.5v, although I've measured them as high as 1.657v when
taken right out of the package.
It just may be that the sensitivity of the SRF-59 is best when the
battery voltage is between 1.3-1.6v, that's just a guess! I would have
to run some tests to confirm this theory.
Interesting post, thanks for sharing.