Suggestion for a memorial
I do not know, if it is possible and I do not know, if Polish authorities would allow it, but I think there should be a small memorial built at Gabin-Konstantynow, where from 1974 to 1991 world's tallest tower stood ( http://en.wikipedia.org/wiki/List_of_towers ). I keep this as a good idea, because I believe in the whole area of the European Union no construction from this height will be built in foreseeable time. New Lo-MedFER "UWL"
And I think that a reminder to the fact, that Poland hosted for 17 years world's tallest construction is a good idea, because many people in Europe nowadays would not believe that Poland was once capable building a 646 metre high construction! In our fast-living time many things are forgotten faster than desired and I think the radio mast of Gabin-Konstantynow is not worth to be forgotten, because its transmitter was well-known to the DX community in whole Europe (and even outside Europe!)
Posted by Eric KD5UWL on June 06, 2005 at 01:27:08.
Hi,
New solar powered MedFER at 520.8 kHz, 100 mW, 8wpm (QRSS3 in a few days - see below). Exciter is 25 MHz oscillator div by 48. Complementary pair final.
In a few days I'll have a better frequency measurement, hopefully within a Hz,
and then I'll switch to QRSS3 and post here.
The exciter board is buried as suggested in December by Dave Brown, ZL3FJ ... he described it best then:
"... use two pvc or similar pipes-one inside the other-pressure rated PVC is probably best to ensure long term water 'rejection'. The outer large one needs to be say six inch dia with an endcap (expensive!) sealing the bottom, and the top at ground level but above the local waterline - also endcapped-but removable for access etc. It could even be located in the concrete floor of a garage or outbuilding if you happen to be about to build one! The inner pvc pipe -say 4 inch (should be big enuff for the equipment) also endcapped at bottom and top but these don't need sealing as the outer pipe will keep the water out.
Outer pipe is 4 feet long- sink in the ground (vertically!) and leave empty for a week or two to verify it IS sealed. Then put a couple of inches of DRY sand in the bottom and lower the smaller pipe in-which only has to be say 12 inches long to contain equipment-with cables out the top or whatever- hold it vertical and away from the sides(probably not that critical) while backfilling around it with more DRY sand-right to the top of the outer pipe.
Make whatever arrangements to get cables out without letting water in and put top cap on. Job done. So whats the sand for??- So you can suck it out with a vacuum cleaner to get the gear out for servicing if you need to."
I included a thermistor in the inner capsule so I can monitor the temperature down there from the transmitter shed. We'll see how it does ...
Antenna is top loaded vertical.
73
Eric - EM25ax
http://www.nutstreet.net/radio/beacons/ HiFer WV
(will update MedFER images soon)
Posted by michael tyler on June 07, 2005 at 12:35:21.
last week we raised the dipole up...it is now at 20 feet and running 3 wpm cw.....have yet to receive a report...the antenna favors east and west.....about ready to try a differant antenna....mabe a vertical....the beacon is locate at my tower site 4 miles from my house ....it has a HAAT of around 800 feet.....on a mountain peak at EM-98...could somebody take a listen on 13.55642 please? tnx...mike...wa8ywo...Richwood, West Virginia
Hifer LP
Posted by Larry on June 08, 2005 at 14:21:32.
I had to shutdown Hifer LP yesterday due to the severe thunder storms.
As of 1250 UTC today June 8 Hifer LP was back on the air on 13.554.980 MHz. Sawtooth waveform /\/\/\/\. Power 4mw into a dipole at 27' NE/SW.
All reports are welcome!
73
Larry WB3ANQ FM19rc
W&G Levelmeter
Posted by Michele on June 13, 2005 at 12:28:08.
Dear colleagues, W2RS QRT for moving
I found a beautiful W&G model TFPM-76. It seems to be quite old, but it is working (apparently) fine.
Has anybody experience of use as a LF receiver?
Thanks in advance.
Michele IW2AAW
Posted by Ray W2RS on June 18, 2005 at 18:50:15.
Hi,
W2RS is moving to Green Valley, Arizona, about 25 miles (40 km) south of Tucson. The new QTH has no antenna restrictions other than the Pima County ordinance that limits towers to 100 feet (about 30m), so an antenna farm will rise in due course. In the meantime, the Green Valley ARC will be operating Field Day from my property there with temporary antennas, so listen for N7GV and let me know how they sound!
I have taken down the New Jersey station in preparation for the move. The house has been sold and the closing is to take place at the end of June.
I should be listening for KPH/K6KPH when they come on in July, also with temporary antennas. I'm sorry, though, that SAQ will be pretty much out of range from there.
Best of luck to all the northeastern Lowfers, and I'll be up and running in Arizona ASAP.
73,
Ray W2RS
Re: HiFer WV
Posted by Matt Joseph on June 20, 2005 at 11:18:24.
In Reply to HiFer WV posted by michael tyler on June 07, 2005 at 12:35:21.
I have a location in EM98 at Paradise, WV with a long wire at approx 1060 feet above sea level. Feel free to comtact me. I will try to receive your beacon.
Re: HiFer WV
Posted by Matt Joseph, KB8RZG on June 20, 2005 at 11:23:45.
In Reply to HiFer WV posted by michael tyler on June 07, 2005 at 12:35:21.
left my call sign off of that one. KB8RZG
vlf
Posted by Partha Sarathi Pal on June 21, 2005 at 06:40:19.
hi, Re: vlf
I am doing project on vlf propagation.I want to calculate the critical height of the particular wavelength of vlf. can anyone tell me what FORMULA should I use here.
reply me. I will wait for it.
byeeeeeeeeeeeeeeee
Posted by John Andrews on June 21, 2005 at 07:05:50.
In Reply to vlf posted by Partha Sarathi Pal on June 21, 2005 at 06:40:19.
Try: http://www.vlf.it/thierry/waveguide_propagation.html
John Andrews
Taldom Transmitter, Taldom, Russia and its special antenna
Posted by Harald on June 22, 2005 at 11:56:15.
Taldom transmitter is a large broadcasting facility for shortwave and longwave near Taldom, Russia. Its longwave transmitter working on 261 kHz is with a power of 2500 Kilowatt world's most powerful broadcasting station and receivable in whole Europe at nighttimes (if Russian authorities did not forget to pay the electricity bill).
There are two aerial systems for longwave at Taldom. One consists of mutiple guyed masts with a height of 257 metres, the other consists of at least 4 guyed masts with a height of 275 metres arranged in a circle and a mast in the centre of the circle.
Further informations of Taldom transmitter are on
http://www.structurae.net/structures/data/index.cfm?ID=s0014896
http://www.drmradio.co.uk/html/taldom.html
http://www.glavpryg.ru/photo/taldom1/taldom1.html
http://www.glavpryg.ru/photo/taldom2/taldom2.html
http://www.mordkovitch.de/savel/taldom/img8.htm
Very curious is, that the masts of one antenna system are - as can be seen on http://www.drmradio.co.uk/assets/images/VoR1.jpg - connected at two levels by each other. What might be the purpose of this? At Alexanderson antennas connection wires are only spun between the tops of the masts! Or do these ropes have no electrical functions?
Re: vlf
Posted by Alan G3NYK on June 22, 2005 at 20:28:36.
In Reply to vlf posted by Partha Sarathi Pal on June 21, 2005 at 06:40:19.
Hi, I am not sure I understand what your are trying to calculate and why the height is critical. The page by Thierry has the basic waveguide formula, but you do not have any control of the waveguide height. You are stuck with what nature gives you. There is a critical wavelength below which a guide will not support a particular mode. The "waveguide below cut-off" technique has been used to provide simple reasonably accurate variable attenuators for signal generators.....the signal decays with distance at a known rate.
I think one of the best sources of equations would be Radio Engineering" by Terman, alternatively "The Radio Engineers Handbook" by the same author.
Regards Re: Taldom Transmitter, Taldom, Russia and its special antenna
Alan G3NYK
Posted by John Hoopes on June 24, 2005 at 12:23:53.
In Reply to Taldom Transmitter, Taldom, Russia and its special antenna posted by Harald on June 22, 2005 at 11:56:15.
That looks like fun! I'd like to give base jumping from a tower a try sometime!
New US NDB
Posted by Michael Oexner on June 27, 2005 at 13:32:16.
Hi all,
There should be a new kid on the block:
VM-259.0 Meana AR USA N34 32 21 W094 04 23
This is not yet shown logged in RNA, so the race is on :-)
vy 73 + gd DX,
Michael
potrzebie