Showing posts with label elf. Show all posts
Showing posts with label elf. Show all posts

10 Oct 2014

Driving again after 13 months

For 13 months I have not been allowed to drive because of my brain bleed. I have had to rely on my wife totally.

Today, I drove to and from the local garden centres at Fordham. This is a round trip of nearly 10 miles. Both the neurosurgeon and my doctor said "yes" and DVLA agreed I could drive again. I informed the insurer too just in case.  I would probably not want to drive too far for a while, but at least I can drive again locally. This is a major step for me. Just a little more independence.

With luck, I hope to be able to resume some amateur radio field experiments quite soon. I am still wobbly on my feet though. It would be good to try some earth-mode tests from this QTH.

5 Oct 2014

Receiving the Russian ZEVS transmissions on 82Hz (yes Hertz!)

See http://www.vlf.it/zevs/zevs.htm .

Quite a few VLF/ELFers attempt to copy the Russian ZEVS transmissions to deeply submerged nuclear subs at around 82Hz, yes, you read right, Hertz. At these frequencies even a few watts ERP penetrate deeply in the sea. The Americans used a similar system called Project Sanguine at around 76Hz , but this has now gone QRT. I think they use green lasers now?

The ZEVS data rate is low and usually there are a couple of transmissions a day. Usually Spectrum Laboratory software is needed for long term stability. Several people have been successful, although I have still to try.

I hope the transmissions are just tests these days!

25 Dec 2008

Radio Nature

A very happy Christmas everyone. One of my presents was the book called "Radio Nature" by Renato Romero which is a very good introduction to the weird and wonderful world of ELF/VLF natural emissions such as whistlers and tweeks. The book, available from the RSGB on-line bookstore, is an excellent read.

See also his excellent webpages at http://www.vlf.it/ .