More likely the meter simply failed to register well on light loads. It doesn't happen with the newer meters.
Chuck WB2EDV ----- Original Message ----- From: Jim Brown To: Repeater-Builder@yahoogroups.com Sent: Wednesday, September 17, 2008 10:06 AM Subject: RE: [Repeater-Builder] Volt-Amp (Re: APC UPS Charging Power) I have a site where for many years the only load was a battery charger feeding a battery to power up the equipment. For many years the power meter DID NOT MOVE! It started moving when I substituted a GE Mastr II base station power supply with backup battery. My theory (correct me if I am wrong) is that the very short duty cycle current pulses drawn when the sine wave is at the crest of the cycle (when the diodes conduct) is why the meter was not moving. The GE Power supply is ferro resonant and draws current over the whole cycle although the power factor is pretty bad. The GE supply also uses a filter choke which reduces the current pulsing when the diodes conduct to a minimum. 73 - Jim W5ZIT
