Home |
Search |
Today's Posts |
#17
|
|||
|
|||
1Hz click external noise? - HF Radar ?
On Jun 5, 9:10*pm, JIMMIE wrote:
On May 24, 2:59*pm, "Lumpy" wrote: Richard Harrison wrote: Yes and I`ve often heard a regular pulse in the USA every time a radar antenna swept in my direction within line of sight range. Radar was in the gigahertz band but the disturbed receiver was at a much lower frequency and of good quality. There's a municipal airport, KSDL, about 2 miles from me. Except for a very occasional tree, it's line of sight. Would a radar induced noise tend to attenuate if my receiving antenna (dipole) were off axis to the radar? Seems to me that it was indeed stronger when the lobes pointed toward the airport. Craig 'Lumpy' Lemke www.n0eq.com Usually inference from an airport radar ASR takes the form of a very raspy 1000Hz more or less burst occuring every 4.5 seconds or so.There is one radar an ASDE that rotates a 60 rpm or once per second. If there is one of these located nearby you may hear the burst once a second. The pattern of the antenna is aimed at the ground hence its name Airport Surface Detection Equipment.At two miles out you could be in its coverage area- Hide quoted text - - Show quoted text - I dont think SDL has an ASDE though I know they were supposed to get an ASR-11. Im not sure if they got it. The airport does have a REIL that flashes stobes to mark the end of the runway. Once a second is probably about the right rate for these. They could eaasily be the source of your RF interference. Jimmie |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
I don't click on | Shortwave | |||
Click to boatachors for sale | Boatanchors | |||
Click to boatachors for sale | Boatanchors | |||
Icom 725 "click" on CW | Equipment | |||
Icom 725 "click" on CW | Equipment |