09-07-2015, 12:13 PM
The big dropper section is four ohms and is rated at several amps continuous.
The panels have banks of 47 ohm 10 and 25W resistors.
I also have big 10 ohm and 25 ohm droppers.
DC resistance gives a clue as to the currant capacity of the winding and loading it until the voltage drops by 5% gives a more accurate clue.
Ohms law gives the actual figure.
Very dead means that it was salvaged from a dead power supply chassis. I was told that there was an SMPSU downstream of it that had a bad reputation for blowing up leaving a good transformer.
The biggest dropper is a serious bit of kit and is used for windings rated at 10 amps or so.
The panels have banks of 47 ohm 10 and 25W resistors.
I also have big 10 ohm and 25 ohm droppers.
DC resistance gives a clue as to the currant capacity of the winding and loading it until the voltage drops by 5% gives a more accurate clue.
Ohms law gives the actual figure.
Very dead means that it was salvaged from a dead power supply chassis. I was told that there was an SMPSU downstream of it that had a bad reputation for blowing up leaving a good transformer.
The biggest dropper is a serious bit of kit and is used for windings rated at 10 amps or so.
