Hello Matti and Jari, I also think its 30000 watt, unless they have some kinda magic antenna. And I will join your movement to change all Am radios to SSB! I really wish stations would, or atleast in the future as a back up to the new and no good DRM/DAB.
The US military do as you say use any speare transmitters, and I think they are on vessels? Was told that atleast 1 was. They can change the angle and wattage of the transmitters when ever they feel. I am so glad you mentioned HCJB on 21455, I remember that station, half the time it wasn't in English when I listened but when it was it was great! It was the only SSB station I could get during the middle of the day as AFN only comes in late afternoon. That was in umm.. 2000 I think, never QSled them thou :( I am just imagining the cost reductions and larger areas RCI and all other broadcasters would have if they used SSB. Another idea might be to invent another radio mode, unlike Fm maybe JM or DM etc heh. Cheers, Rob Wise HRI > Message: 1 > Date: Fri, 30 Dec 2005 08:58:16 +0200 > From: "Matti Ponkamo" <[EMAIL PROTECTED]> > Subject: Re: [HCDX] Diego Garcia kW > To: <hard-core-dx@hard-core-dx.com> > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=original > > Hi Rob and all HCDX readers, > > Huh, to begin with, sorry, a typo: 3000 W SSB equals about 12 kW AM of > course. I seem not to be very good at counting zeroes. Some kind of > reeeding disorder ? (hi) > AFN seems to have good equipment to push the signal around the globe. I > still think that the published 3000 W may be 30000 W in real life. > The carrier in AM takes about 50 per cent of the power, the one single side > band takes 25 and the the other takes 25 per cent. So, the required power > to create a SSB signal through the air is only a quarter compared to that of > an AM. With a decent bandwidth (in transmitter and receiver) and not too > much compression in transmitted audio, even music can be quite enjoyable. > Let's modify all the AM receivers in the world into SSB receivers... > > 73 de Matti Ponkamo, Naantali, Finland > > > > Date: Thu, 29 Dec 2005 18:01:09 +1100 > > From: Rob Wise <[EMAIL PROTECTED]> > > Subject: Re: [HCDX] Hard-Core-DX Digest, Vol 36, Issue 29 > > To: hard-core-dx@hard-core-dx.com > > > > Hoyo Matti, > > > > I think more organizations/ international broadcasters should use SSB > > as its less power. All the BBC do is talk all day, so why bother using > > AM? > > Anyhow AFN seem to get around the globe on only a few watts so thats > > good news, and 120 KW AM seems like little distance. > > I find the AFN has over modulation issues with the Diego Darcia TX as > > the audio is a tad distorted (clipping). > > Rob Wise > > HRI > > > > > Date: Wed, 28 Dec 2005 09:49:59 +0200 > > > From: "Matti Ponkamo" <[EMAIL PROTECTED]> > > > Subject: Re: [HCDX] Diego Garcia kW > > > > > > I recall that ILG says 3000 watts USB, and that equals about > > > 120 kW AM ? > > > > > > > ------------------------------ > > Message: 2 > Date: Fri, 30 Dec 2005 10:01:15 +0200 > From: "Jari Savolainen" <[EMAIL PROTECTED]> > Subject: Re: [HCDX] Diego Garcia kW > To: "HCDX" <hard-core-dx@hard-core-dx.com> > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="us-ascii" > > I guess Navy bases may use any transmitter available > at that moment to relay AFN. So we can never be sure > if the certain transmission is with "listed power" or maybe > more. Also Guam 5765 is some days real strong here. > Years ago (my QSL from 1998) HCJB (Quito) had a 500 W > USB transmitter on 21455 (with rhombic 35/225 degs) and > the signal was nice here in Finland. They still use some > SSB transmitters (I recall 1 and 25kW) but with reduced > carrier added to enable reception in AM mode. With reduced > carrier the formula to compare with AM, Matti gives, doesn't > work directly, I believe. > 73 > Jari Savolainen > Kuusankoski > Finland > -- Cheers, Rob Wise. Hobart Radio International - 1 Year Old!! www.hobartradiointernational.co.nr Post Box 711, Rosny 7018 Tasmania, Australia. Moderator of French Learning and SW Radio News yahoo groups. ---[Start Commercial]--------------------- World Radio TV Handbook 2006 is out. Order yours from http://www.amazon.com/exec/obidos/ASIN/0823059367/hardcoredxcom/ ---[End Commercial]----------------------- ________________________________________ Hard-Core-DX mailing list Hard-Core-DX@hard-core-dx.com http://arizona.hard-core-dx.com/mailman/listinfo/hard-core-dx http://www.hard-core-dx.com/ _______________________________________________ THE INFORMATION IN THIS ARTICLE IS FREE. It may be copied, distributed and/or modified under the conditions set down in the Design Science License published by Michael Stutz at http://dsl.org/copyleft/dsl.txt
