On 2/3/2025 3:54 PM, Henry Pfizenmayer via RFI wrote: > It is a series of switching mode like carriers every 30 khz . > Each group is about 2 khz wide and consists of very stable Hi Hank, Stable says it's running from a clock, the rest of it suggests something power-control, anything from charging to process control in mfg. 73, Jim K9YC