Rosie
Well Known Member
My Whelen strobe pack quit working last week, so I checked voltage at the pack; 12.5v (battery voltage). Sent the pack to Whelen and it bench tested OK.
Further testing last night finally revealed that I had 12.5v at the switch output, and ~3.5v at the pack (unloaded, not connected to a borrowed pack). A bypass wire from the buss to the pack was used; strobes worked fine, all good.
Voltage (3.5v) was tested with voltmeter 'red' on the positive strobe wire (at the pack), 'black' grounded to the aircraft (Note: ground wire from the panel buzzed out OK).
I'm yet to buzz the positive wire from the panel switch to the pack, so in the mean time....where is my missing 9v? Rosie
Further testing last night finally revealed that I had 12.5v at the switch output, and ~3.5v at the pack (unloaded, not connected to a borrowed pack). A bypass wire from the buss to the pack was used; strobes worked fine, all good.
Voltage (3.5v) was tested with voltmeter 'red' on the positive strobe wire (at the pack), 'black' grounded to the aircraft (Note: ground wire from the panel buzzed out OK).
I'm yet to buzz the positive wire from the panel switch to the pack, so in the mean time....where is my missing 9v? Rosie