© DELARA News a monthly publication of the Delaware Amateur Radio Association
DELARANEWS

Field Day

That Pesky Pulse

During several of our operations, up until last week, we have been plagued by a pulsing noise on HF, typically on 40 and 80 but sometimes it could be heard anywhere. We have carried radios around the Red Cross building, tuned radios outside, gone through many hoops. Last week, the pesky critter was located and stomped! Here’s the story: There is no generator attached to the building. In general, any ARES activation would expect to be during a power outage for at least some of the time. Thus- we installed the dual-band radios with a battery under the desk so that at least the radio operation would not be impeded. A longer term outage would bring a generator from the barn, of course, but the short blink off and back on was something we wanted to prepare for. So- we had a small battery tender on the battery to keep it charged. Guess what. After all the sleuthing, we simply didn’t think to check. At some point, it was remembered that there was a similar pulsing noise at the start of Field Day last year (2017) and we quickly disconnected the shore line / charging line from the Red Cross vehicle to stop it. Well, this was that very same type of pules… and sure enough, the little red light was blinking right along with the pulsing noise. Found! So Bob is saving the day for us once again by bringing in a better unit that runs the radios from a power supply and at the same time diverts a charge to a battery. When the power blinks, it switches to the battery. RF quiet. WIN! It’s the little things that drive you batty!!
DELARANews

Field Day

That Pesky Pulse

During several of our operations, up until last week, we have been plagued by a pulsing noise on HF, typically on 40 and 80 but sometimes it could be heard anywhere. We have carried radios around the Red Cross building, tuned radios outside, gone through many hoops. Last week, the pesky critter was located and stomped! Here’s the story: There is no generator attached to the building. In general, any ARES activation would expect to be during a power outage for at least some of the time. Thus- we installed the dual-band radios with a battery under the desk so that at least the radio operation would not be impeded. A longer term outage would bring a generator from the barn, of course, but the short blink off and back on was something we wanted to prepare for. So- we had a small battery tender on the battery to keep it charged. Guess what. After all the sleuthing, we simply didn’t think to check. At some point, it was remembered that there was a similar pulsing noise at the start of Field Day last year (2017) and we quickly disconnected the shore line / charging line from the Red Cross vehicle to stop it. Well, this was that very same type of pules… and sure enough, the little red light was blinking right along with the pulsing noise. Found! So Bob is saving the day for us once again by bringing in a better unit that runs the radios from a power supply and at the same time diverts a charge to a battery. When the power blinks, it switches to the battery. RF quiet. WIN! It’s the little things that drive you batty!!