Radio and Television Transmitter site
TV-FM DX`ing page of Dennis H. from the Netherlands.


time into the Netherlands 


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The Radio and Television Transmitter site TV-FM DX`ing page of Dennis H. from the Netherlands.

 

Band 1-2 List
under construction !!!

FM - TV frequency list (NL)
updated 04-04-2002

Qsl`s
updated 01-12-2001
Bookmarks
updated 04-03-2002
Id/logo
updated 04-03-2002
RTV Tower Gallerie
updated 04-03-2002
F2/DX
updated 04-03-2002
Personal
updated 01-12-2001
Testcard -  Nostalgia
04-03-2002

 

VHF/ UHF Tropospheric Ducting Forecast

Sp-E news

 

TV - Channel Information

FM - TV Propagation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thailand 2001

Transmitter
near Sukhothai

Radio and Television DX:
The importance of understanding basic VHF and UHF propagation cannot be overemphasized. 
Unlike DXing on the shortwave bands, you can't just turn on the receiver, tune around, and expect to get a faraway station. On VHF and UHF the normal situation is no DX, until some abnormal propagation occurs. Also, unlike shortwave, there are several different kinds of propagation above 30MHz you cannot DX effectively or be able to evaluate what you pick up, without being able to tell one propagation from another! Fortunately, the propagations differ sufficiently from one another that by combining a little experience with the descriptions to follow, you should seldom have any difficulty assigning one definite propagation mode to each DX catch. Why is this so important? If all you care about is the quantity of DX receiving each station once it may not matter so much. But it does matter for quality. For example, over the course of several years you may be able to pick up a given station by two, or even three different propagation modes. One will undoubtedly be much rarer than the other(s). For instance, a channel 2 TV station 1000 miles away is relatively easy to see via sporadic E, while the same station is very seldom subject to tropo propagation over such a distance. On the other hand, a channel 7 TV station will seldom cover such a distance, but when it does it will do so more readily by tropo than by sporadic E. So let's look at these mechanisms to which we owe our hobby.


Short History:
My hobby is FM and TV DXing, receiving distant radio and TV signals. I started this in 1984, and a member of the Benulux dx club
bdxc

before that had operated an illegal (FM) radio transmitter for five years. In 1989 I installed a dish for receiving satellite transmissions.In the autumn of 1997 I bought a computer, discovered the Internet, and since then have enjoyed developing my own homepage.

Propagations:
The normal service area from a high powered transmitter at VHF or UHF extends to and just beyond the optical horizon. Such reception within this area is termed`direct` reception and is basically a `line of sight` medium - one inwhich the receiving aerial can `see` the transmitting aerial. Since we are interested in the more esoteric forms of signal propagation and over far greater distance than relatively near signal sources. Sporadic E Skip (ES), Backscatter, Tropo (Tropospheric bending), Meteor Scatter(MS), F2 Skip, Auroras, Trans-Equatorial Scatter(TE), Lightning Scatter(LS).

Television standards:
Recently a lot has been accomplished to facilitate easy reception of foreigen broadcasts by simplifying television standards. The discontinuation of the high-difinition French 819 lines standard and the rather poor British 405 lines standard left the world with just 2 standards; 525 lines. (generally accompanied by the American NTSC colour system) and 625 lines (usually in PAL or SECAM colour). The technical characteristics of the various transmission systems are given in the tables below. The colour standards (PAL, SECAM, NTSC) and television
system used by each country are indicated at the top of the country entry. Antenna polarization varies from one transmitter to another and either (H)orizontal or (V)ertical.

 


 

The Solar Cycle


Every 11 years the sun undergoes a period of activity called the "solar maximum"
followed by a period of quiet called the "solar minimum".  During the solar maximum there are many sunspots, solar flares, and coronal
mass ejections, all of which can affect communications and weather here on Earth.
Sunspot Cycle 23

Solar Terrestrial Activity Report: Report


 

 

Nedstats homepage 


Please
e-mail your comments and suggestions

 

copyright 1996 - 2002 Dennis H.

 

 

 

 

 

 


For Suggetions and Commens you can send me a email...

 

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