Edmund Laport was Chief Engineer of RCA International when he published his 542-page book "Radio Antenna Engineering", McGraw Hill 1952. Allow me to quote from page 14 of that wonderful book: "Low-fr
The subject of this query is waterfall programs and sound cards. a) is there any sound card that is better than the others? (Such as "Sound Blaster"?) I am told that some waterfall programs will not
Re Waterfall programmes [...] I am running a PC with 233Mhz clock, cyrix 300 MMX chip set, 32M Ram and a creative labs soundblaster 16. First I downloaded FFTDSP42, which I believed should run on my
An ARRL information sheet on the CEPT Radio Amateur License and the FCC Public Notice are on the ARRL Web site at: http://www.arrl.org/field/regulations/io/cept.pdf (info sheet) http://www.arrl.org/f
[...] In conclusion this observation would suggest that the best time for Transatlantic QSOs would be about half an hour before dawn ( I dont know whether that is the visible dawn or a sort of 'radi
I have just received from a Radio Amateur in San Diego (on the West Coast) the following message: Quote: There is a station on 137 Khz located in Dixon, Calif. The call sign is NPG it is operated by
How do I form a low loss coil for 137 kHz using mentioned 2mm annealed copper wire? Hi, Gamal, Do you have access to teh ARRL Antenna Handbook, 18th edition (1998), page 5-6 to 5-8? If not, e-mail m
[...] The field strength is given by e= (18.85*N*E*(r)^2)/X*d^3 where N is the number of turns on the exciter coil E is the sig-gen voltage in mV r is radius of the exciter coil; in cm d is the dist
Hello Dick and other LF enthusiasts, We will place your description and attachments on the AMRAD reflector http://www.amrad.org Regards Andre' ** Dick Rollema wrote: I have constructed a portable fie
On page 20 of the August 1999 issue of QST appears a photograph of Steve GW4ALG's 136 kHz transverter, along with some very positive comments. Congratulations Steve :-) Andre' N4ICK
[...] If sky wave mode is what is actually being sought after, then it may well be worth experimenting with a horizontal "dipole"? assuming the above hypothesis is valid, why not a horizontal loop,
France's regulatory authority has accepted the use by amateurs of the 136 kHz band, but the text has not yet been published in the Official Journal. congratulations :-) Does anybody know about some
Dear Bernd, [...]Does not run here :( Trying that from your webside online I got: "...Applet1 got a security violation: method verification error" Running Communicator 4.05, LINUX (Kernel 2.0.33) on
Just in case some of you have not read it yet, the Spring 1999 issue of Communications Quarterly features a thought-provoking article by Dr Robert Brown NM7M, on "Atmospheric Ozone". (pp.97-103) Quot
Hello Chris, A mathematical (and practical) treatment of Multiple Tuning for vertical antennas can be found in: Radio Antenna Engineering by Edmund Laport McGraw Hill NY 1952 pp. 38-43 This book is o
If it is not asked too much I would be interested in a copy of the Multiple Tuning Antenna too. in the mail today :-) Regarding the meander-antenna : if you scale all the described antennas to 136kH
Has anyone performed some reverse engineering on the Dutch-manufactured "The First" 136 KHz transmitter? If so, please reply directly to me: [email protected] Thanks in advance Andre' N4ICK
[...] Secondly, the latest on the CFA antenna. The latest 'analysis' of this antenna was no more than more guessing. Academics are worse in this respect. We get bamboozelled by Curl, Div and Poyntin
If he is stuck on 136.550, it looks like he is using a Ropex Tx. I have now modified two of them, that is installed a new crystal, which does involve some major surgery. In addition, if one wants to
True, but Andre suggests that EU broadcasters come in best at US sunset (our midnight). Whenever we can hear the West-European (and Moroccan) broadcasters, it usually starts around 1700h and remains
