Re: Topband: Fwd: Echo on 160m yesterday morning

Thanks for these references on magnetospheric ducting. Looks like as good an explanation as any I've seen (and better than most). Art Delibert, KB3FJO From: Topband on behalf of Andy Cook Sent: Monday,

Topband: Long-delay Echos

Greetings All Back in the late '70s I experienced some long duration echoes on 80-meters SSB. I had been burning the candle at both ends DXing at my pre-sunrise and late after dark for a few days and was falling asleep at the "mic". I found myself getting teed-off by someone CQing on the freq

Re: Topband: Echo on 160m yesterday morning

This is interesting. I recall a discussion here about very long LDEs awhile back. IIRC, it was suggested that perhaps the magnetosphere and the Van Allen belts might be involved, rather than the much closer ionosphere. I heard a double echo on 75m last year. I heard his direct signal which was

Re: Topband: Echo on 160m yesterday morning

I experienced long delayed CW echos once on 20m, back in the 1980s before there was much wireless stuff. Also, I lived in the country with no close neighbors. The delay was significant because I was not using instant break-in, with the rig taking at least 1/4 sec to switch to receive. I

Re: Topband: LDE on 160m

I had a friend (VE7BLF) many years ago who noted the same thing on 160m, with his 'night before' CW CQ's being heard 24 hours later! The signals were somewhat watery and not very stable...rather tortured sounding as if they had been to hell and back. The mystery continued for a few years but

Re: Topband: Echo on 160m yesterday morning

Nowadays we have a huge amount of RF repeaters in use for several services, like , Wi-Fi , LTE4, Data links. Microwave links, FM stations link, TV video links. All these systems has a receiver and a transmitter. The intermediated frequency used can be close to few MHz depending the services.

Re: Topband: LDE on 160m

In the mid -80's while living in Seattle ,WA I experienced extremely strong LDE signals on 160M while in a SSB ragchew with locals on ~1860kHz. Unfortunately I lost the tape in my move to the SW US. The delays were approximately 1 sec and were only heard within a radius of about 50 miles. A

Topband: Echo on 160m

Bruce K1FZ said: "I have noticed that there appears to be a link between the start of an aurora and long path 160 meter openings." Others have noted this interesting effect. The only physical tie between the two that I'm aware of is that a spike in the K index can initially improve the electron

Re: Topband: Echo on 160m yesterday morning

Andy, There was a passenger on an airliner that took photographs of a very large Aurora at that time. . One of the photographs was shown on TV -ABC World News. It is likely that the Aurora sparked all these events. I have noticed that there appears to be a link between the start of

Re: Topband: Echo on 160m yesterday morning

I think this form of ducting takes place way above the layers of the atmosphere where weather happens. In my experience the magnetospheric ducting is normally localized in impact. If this was really happening in multiple places around the world at the same time on this occasion then I think

Topband: Fwd: Echo on 160m yesterday morning

Hi Andy, Ducting takes place over a relatively small area. Depends upon cloud layers and temperature zones This event took place ~ world wide. Band openings between North America to Asia, and Australia. 73 Bruce-k1fz http://www.qsl.net/k1fz/beverage_antenna.html  On Mon, 6 Feb

Topband: Fwd: Echo on 160m yesterday morning

I think you'll find this was Magnetospheric Ducting. Take a look at some of the articles here http://la3za.blogspot.co.uk/search/label/Unusual%20Propagation and here http://folk.uio.no/sverre/papers/2009_MagnetoDucting-QST-LA3ZA.pdf. Delay depends on your latitude - but couple of hundred