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  #26  
Old 06-19-2008
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I will look in to that it shouldn't be to hard for me to try and do on my truck.
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  #27  
Old 06-20-2008
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Quote:
Originally Posted by FireRanger View Post
Have you ever actually measured that?

I will admit I haven't touched a CB in a very long time. However my experience with "real" two way radios tells me that you might be disappointed if you put that jacked up CB radio on a service monitor. To begin with, I doubt you are actually doing 70-80 watts. But thats just a guess. In either case, it is probably transmitting the equivilent of RF vomit. You just can't take a radio spec'd for 4 watts and make it do twenty times that without it being screwed up.
they open the cb up and replace resistors and some other things to make it handle the power. Also a cb is only at 4 watts dead key, at full swing( in transmission) a stock radio puts out between 14-17 watts. When you are running over 50 w the mic plays a big role in the clarity of your signal, that is why i am soon going to getting a power mic to run when i install my linear amp
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  #28  
Old 06-20-2008
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That isn't how RF works. Power output is power output regardless of audio. They absolutely do NOT "swing up". Doesn't work like that at all.
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  #29  
Old 06-20-2008
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yeah power output is output, but it varies between dead key and transmission, a radio can recieve with minimal power but to transmit it pushes more watts.
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  #30  
Old 06-20-2008
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I think you are really really confused. When you transmit, meaning any time the radio is keyed, you are transmitting a set power output, period. It doesn't vary or swing at all. In the case of a CB working as designed, it is going to transmit at 4 watts regardless of what you are doing.

Maybe you are thinking of amp draw from the 12 volt power INPUT. If that is the case, then yes you could be drawing less than an amp while receiving and it will go up to several amps during transmit. That amp draw during transmit depends on a lot of design factors but should be reletively consistent regardless of speech.
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  #31  
Old 06-20-2008
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Quote:
Originally Posted by Sad_Savant View Post
here's what's gonna be in mine after christmas:

Antenna
Dual 3ft Firestiks, Firestik K9A 18ft Coax, mounted on Firestik K1A QD's, w/SS3H springs on each antenna
Radio
cobra 148GTL classic with modified single side band, Connex RogerBeep and Talkback,
custom built modulation kit with 1w-3w dead key, 15w-50w modulation swing, recieve booster with +30db boost and -30db attenuator, FC30BT Freq Counter, and a RK56B mic

(reads: overkilled truckers special, minus Wilson 5000 Super Trucker Whip antennas)
this is on the lines what i am talking about, i got this from a old thread
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  #32  
Old 06-20-2008
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check this out it might work out as a mount for you.http://www.cbcity.com/shop/

i was going to use this mut made my own instead. will post as soon as i get my camera back.
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  #33  
Old 06-25-2008
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Quote:
Originally Posted by FireRanger View Post
I think you are really really confused. When you transmit, meaning any time the radio is keyed, you are transmitting a set power output, period. It doesn't vary or swing at all. In the case of a CB working as designed, it is going to transmit at 4 watts regardless of what you are doing.

Maybe you are thinking of amp draw from the 12 volt power INPUT. If that is the case, then yes you could be drawing less than an amp while receiving and it will go up to several amps during transmit. That amp draw during transmit depends on a lot of design factors but should be reletively consistent regardless of speech.
CB is AM So its power can be varied by the Amplitude or "Audio" fed into it. FM Does not do this.

Watch SSB as the power swings from almost zero watts to 17 on a stock radio, This is why most amplifiers made for SSB have a delay to keep the amp triggered because there is no power to detect until you modulate your signal.
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  #34  
Old 06-25-2008
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http://i291.photobucket.com/albums/l...K/IMG_0068.jpg
This is that custom mount I said I would Post
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  #35  
Old 06-25-2008
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so i ordered one on the 19th and its not here yet...
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  #36  
Old 06-25-2008
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Amplitude and watts (power output) are also two mutually exclusive things. Modulating amplitude has NOTHING to do with modulating power output. You are again very confused about how transmitters work. Wattage is constant regardless of frequency or amplitude. Not two weeks ago, I had an AM transmitter hooked up to a $10,000 service monitor and I could see everything it was doing... watts, amplitude, everything. So unless someone re-invented the RF transmitter in the last two weeks, I'm pretty sure I know what I'm talking about.

Last edited by FireRanger; 06-25-2008 at 10:14 PM.
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