On 7/2/2011 1:50 PM, Phil Kane wrote: > How close and exposed was the rig to a medium or high power > radar installation? Sounds like that (audio rectification).
None remotely close. When it was still McClellan AFB, there was a shop in the corner which repaired mobile tactical radar equipment. Interstate 80 went over an overpass over the Union Pacific tracks there, and got just high enough to put my hearing aids into the bottom of the beam as I commuted to work. It's an unmistakable sound, not what we were hearing. You do trigger a possibility however. I used to use my K2 for RTTY and had a problem with some sort of cross-coupling between the CAT cable and the audio to/from the computer and my headphones. It sounded a lot like what we heard on Leviathan, and appeared to be N1MM polling the radio. It too sort of came and went some, and did not interfere with RTTY transmission or reception, just annoying in the cans. I'm wondering if there is some connection to one or more data systems in the vault. The solar array is very large, possibly the noise was associated with the charge controllers. At any rate, I don't glow in the dark and Rich would have said something if he did, and the pulses we heard were not a series of prime numbers [alas, not ET, little, green or otherwise]. Our K1/K2's are fine. > until that radar was replaced by PavePaws at Beale AFB. About 20 mi from me. The radar feeds 520 peak watts each [individual PA's] to 1,760 antenna elements in a phased array antenna with about 37 dBi gain in the 70cm band. That's about 900 KW peak "real watts," and about 4.5 GW EIRP. Those of us with 70cm repeater systems have had to take some draconian measures to comply with the USAF requests to lower our power at the radar. At 4,586 megawatts EIRP, how come I've never heard it? [That's a rhetorical question. It's just mildly strange that we don't hear it] 73, Fred K6DGW - Northern California Contest Club - CU in the 2011 Cal QSO Party 1-2 Oct 2011 - www.cqp.org ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
