Various aspects of home brew inverters

Author	Message
Warpspeed Guru Joined: 09/08/2007 Location: Australia Posts: 4406	Posted: 09:14am 09 Jul 2018       That seems like a rather low and flat peak Klaus. Try it again with a much higher value series resistor. I just went out to the shed and grabbed an inspire toroid which only has the 130v primary winding on it, and a 5uF. Quickly measured it with a multimeter and a 1K series resistor at 20Hz intervals. I had no idea where the peak was going to end up... 20Hz 258mV 40Hz 659mV 60Hz 977mV 80Hz 863mV 100Hz 706mV 120Hz 585mV 140Hz 493mV 160Hz 424mV 180Hz 368mV 200Hz 323mV Looked at the whole thing on my brand new (thirty+ year old) antique spectrum analyser measured the same way, 1K series resistor, 20Hz per horizontal division, linear vertical scale. There is a clearly defined peak at about 62Hz, and its reasonably sharp too. Edited by Warpspeed 2018-07-10 Cheers,  Tony.