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SuperStar 3900 frequencies?
"Dr.Death" wrote...
"Peter" wrote... I get the impression that this may have been a Troll post, but it really is a valid point. It is far too common to refer to a broadcast band by the modulation method used rather than the band of frequencies used. Here in the UK we refer to those radio broadcast bands as "MW" (Medium Wave) and "VHF" (Very High Frequency). These bands are also commonly referred to as "AM" and "FM" simply because the MW band uses Amplitude Modulation and the VHF band uses Frequency Modulation. We also have a band called "LW" (Long Wave), which also uses AM. Regardless of the wave length, you can transmit an AM, FM, SSB or CW signal. As long as the law permits it :~) Our MW and LW bands are both used with AM, our VHF band uses FM. Technically it is possible to use any mode on the frequencies, but not legally. Because such bands are always used with AM or FM, they often get referred to by the mode used... which can be misleading. MW, LW and VHF are just different frequencies. Bands of frequencies. I don't know how many people in the UK still listen to MW or LW when VHF broadcasts, using FM, provide much clearer audio and stereo broadcasts. Regards, Peter. |
#2
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SuperStar 3900 frequencies?
"Peter" wrote in message
news:449d021e.0@entanet... "Dr.Death" wrote... "Peter" wrote... I get the impression that this may have been a Troll post, but it really is a valid point. It is far too common to refer to a broadcast band by the modulation method used rather than the band of frequencies used. Here in the UK we refer to those radio broadcast bands as "MW" (Medium Wave) and "VHF" (Very High Frequency). These bands are also commonly referred to as "AM" and "FM" simply because the MW band uses Amplitude Modulation and the VHF band uses Frequency Modulation. We also have a band called "LW" (Long Wave), which also uses AM. Regardless of the wave length, you can transmit an AM, FM, SSB or CW signal. As long as the law permits it :~) Our MW and LW bands are both used with AM, our VHF band uses FM. Technically it is possible to use any mode on the frequencies, but not legally. Because such bands are always used with AM or FM, they often get referred to by the mode used... which can be misleading. We are only allowed AM and SSB on 11 meters in the US, but many so called export radios have FM though rarely used and cw mode for the supposed 10 meter radios that hams would never buy and easily convert to cover 10, 11, and 12 meters. MW, LW and VHF are just different frequencies. Bands of frequencies. I worded it wrong, but thats what I meant to say. I don't know how many people in the UK still listen to MW or LW when VHF broadcasts, using FM, provide much clearer audio and stereo broadcasts. There are always holdouts on dying modes of communications. The "CW vs. no CW test" war is raging on in the US as an example. Regards, Peter. Cheers! |
#3
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SuperStar 3900 frequencies?
"DrDeath" wrote...
We are only allowed AM and SSB on 11 meters in the US, but many so called export radios have FM though rarely used and cw mode for the supposed 10 meter radios that hams would never buy and easily convert to cover 10, 11, and 12 meters. We have FM, it's all we are allowed. America will not make FM legal and we will not make AM legal. So, where does that leave the "illegal CB causes interference" argument? Simple, AM and SSB must cause interference because they are illegal here, and FM must cause interference because it is illegal in America. And, as America have a distance rule, once you reply to someone beyond that distance, you will start to cause interference. The answer is simple... as illegal CB causes interference, make it all legal so it will not cause interference :~) I don't know how many people in the UK still listen to MW or LW when VHF broadcasts, using FM, provide much clearer audio and stereo broadcasts. There are always holdouts on dying modes of communications. You mean like America still using AM CB? Regards, Peter. http://www.citizensband.radiouk.com/ |
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