Re: Tesla Coil RF interference (humidity)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net> 

 > Ok, I guess this is off topic, but to bring it back to
 > topic...my coils don't mind the humidity much.  I
 > guess it is because I tend to run them indoors most of
 > the time, with the the AC on to cut down humidity.  It
 > would be nice to have a hygrometer and do some real tc
 > humidity spark length comparisons.
 >
 > -Brett

Radio Shack, etc., often has hygrometers for cheap as they change models and
physical configurations.  The usual run of the mill solidstate sensors are
good to a few percent.  Sensirion (http://www.sensirion-dot-com/ )was mailing
out samples for their humidity sensor chip. For instance: the SHT11 is a
digital (2 wire) output...Single chip sensor module, fully calibrated with
digital 2-wire output. 0-100%, -40 to 120°C, fully immersible, accuracy +/-
3.5%RH, +/- 0.5°C -at- 25°C, response time humidity sensor 4s

You can also do the wet bulb/dry bulb thing and look it up in a
psychrometric chart.  If you've got a thermometer with any sort of probe
(i.e. a standard alcohol thermometer or a cooking thermometer or an
electronic thermometer with the probe) and a wet shoelace, you're all set.