Posted in the what did you mod today thread with no responses. Today I put a mcclicky switch in a maglite D tail cap. I’m getting a reading of 4 ohms from the top of the spring to the side of the cap. Seems a bit high to me. Any thoughts?
Are you measuring through the ano?
Also, it’s unclear how th mcClicky connects to the tail cap electricly since the rubber button is in between. 4 ohms is high, .4 ohms might be more in line with thin leads and not so great alligator clips but measuring low resistance is better done by measuring voltage drop and calculating resistance from R = V/I.
RBD is getting you on the right track. I’ll dip in a bit: something’s up, your “no load” resistance measurement should be very low, certainly under 1 ohm.
By way of example, I just measured a Solarforce reverse clicky w/ a spring bypass at 0.1 ohms on the 200 ohm scale using an unmodded meter. I applied moderate pressure to the probes. This switch was installed in a SF tailcap while I did the measurement.
Getting accurate results requires what RBD described, a known current across the switch using a CC power supply (or simultaneously measured current!) and measure the voltage drop across the switch.
Thanks. Ditched the alligator clips and got a better reading.