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Post by broncobill on Nov 6, 2009 14:48:15 GMT -5
what is anybody actually doing when they say they had a swing mod. put in there radio-thanks bruce
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Sandbagger
Administrator/The Boss 
Posts: 6,250 
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Post by Sandbagger on Nov 6, 2009 19:57:34 GMT -5
what is anybody actually doing when they say they had a swing mod. put in there radio-thanks bruce In essence a swing mod sacrifices carrier power for stronger audio swing. Normally a radio is setup to do 100% modulation, which results in 4 times the carrier power or 16 watts peak power. When you do a swing mod, carrier power is dropped to around 2 watts, but still swings to 16 watts, which results in a 150% modulation, and will sound louder. The biggest problem with doing this is that the typical method that most CB shops use allows the positive modulation to rise to 150%, but does not hold the negative to 100%, and instead cutsoff hard at zero power. This results in a great deal of splatter being created which will bleed onto adjacent channels and cause interference. There is a proper way to do this, and it's referred to as "asymmetrical modulation" or "super mod". But to do it right involves a far more complicated circuit, so it's not widely done on CB. |
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Post by broncobill on Nov 6, 2009 22:57:17 GMT -5
thanks very much for the reply
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Post by spitfire441 on Nov 8, 2009 7:21:24 GMT -5
what is anybody actually doing when they say they had a swing mod. put in there radio-thanks bruce In essence a swing mod sacrifices carrier power for stronger audio swing. Normally a radio is setup to do 100% modulation, which results in 4 times the carrier power or 16 watts peak power. When you do a swing mod, carrier power is dropped to around 2 watts, but still swings to 16 watts, which results in a 150% modulation, and will sound louder. The biggest problem with doing this is that the typical method that most CB shops use allows the positive modulation to rise to 150%, but does not hold the negative to 100%, and instead cutsoff hard at zero power. This results in a great deal of splatter being created which will bleed onto adjacent channels and cause interference. There is a proper way to do this, and it's referred to as "asymmetrical modulation" or "super mod". But to do it right involves a far more complicated circuit, so it's not widely done on CB. Or you can skip all that and get a Regency Range Gain or Imperial. Double sideband reduced carrier. Same effect, cleaner signal. I have already converted one of the Connex crowd. |
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Post by jacobs132 on Mar 2, 2010 20:19:17 GMT -5
i have a couple of the regency rainge gain radios, they do have loud modulation, got to love those old tube radios!
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