| Author |
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Dutchman
| | Posted on Thursday, May 24, 2001 - 11:02 pm: | 
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I currently have a 40 ch cb (older President model) and a K40,will be running one of Coppers 40 watt amps as soon as it gets here!!!
Max distance will be 30 miles in gently rolling terrain...air seems pretty clear out here ,not a bad amount of background noise to deal with.
Question is...Before I go and get a radio for base use to send to....is it realistic to expect to go that far consistantly?? Base will have a Maco 5/8 wave Ground Plane antenna at home on a hilltop about 30 foot up. Can an AM do it??? or do I need to go ssb???? or do I need more juice with a recieve preamp in the mobile???and put the 40 watter in the base setup??? Help!! |
307 (307)
| | Posted on Friday, May 25, 2001 - 8:05 am: |
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Well 30 miles is a LONG way , however with a Maco 5/8 , that was the right choice. I am not sure if a Rad-Shack barefoot will do it , you need more like 150 watts to do that job. The base is the one that needs to be as high as possible and if AM does not make it SSB most likely will. |
Dutchman
| | Posted on Saturday, May 26, 2001 - 2:29 am: |
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ok.another question.
Looked at those 10 meter radios.I understand that ssb still is subject to skip interference,as well as atmospheric conditions.
now 10 meter radios have FM freqs....
are these similar to those used by police/fire/ambulance etc???
if so,are they just as clean sounding??
and with 40 or so watts...what realistic range will they transmit cleanly considering same antennas as above?? |
307 (307)
| | Posted on Saturday, May 26, 2001 - 7:53 am: |
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FM sounds pretty good and yes , like the companies you listed above except that it is on 11 meters. Realistcally 40 watts is not going to cut 30 miles , it will be difficult. I would say "Clear Communications" will be about 3 to 6 miles at 40 watts. |
Dutchman
| | Posted on Saturday, May 26, 2001 - 10:28 am: |
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ok,gotcha. The jist of this all is then,that am/ ssb is most used,best way to go for those on "limited" budgets.
And REAL POWER is what it takes.
200 watts is more inline with what I am trying to do.
any more,and I am better off getting a cellphone!!
last question,a guy in a shop near here once said to put in "extra freqs"..in between channels....,so you could go to these and talk with less background noise and "skip" interference....is this a consideration???
Or a waste?? |
307 (307)
| | Posted on Saturday, May 26, 2001 - 9:08 pm: |
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Extra "Channels" will definatly help! it is much quieter on them. |
david
| | Posted on Saturday, May 26, 2001 - 9:21 pm: |
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Dutchman,
The xtra channels aren't authorized, so be careful. (not preaching, I use 'em). That said, the answer to your question about them is a qualified yes. Sometimes they are a little quieter than the regular 40. There is a lot of stateside and international skip on the sidebands throughout. If you are looking for a quiet place to talk to another station(s) in your area, see if your radio can tune the radio control channels...they are located between channels 3-4, 7-8,11-12, 15-16, and 19-20 in the regular cb band. I find that they are often the quietest spot in the whole band. It can be fun to play FM there. Make sure there isn't someone using an RC toy nearby, though...you can tell, it will be a buzzing type of sound, and you will only hear it if someone is REAL close...
Operating FM in this area is pretty darn cool...Even when the rest of the band is totally trashed, these can be usable for pretty reliable local base to base, or base to mobile communications. |
707
| | Posted on Sunday, May 27, 2001 - 11:09 pm: |
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Keep in mind.. the RC channels(in between CB channels) are quiet for a reason. If you key up on a good skip day, you could wreak havoc with some R/C plane 1000 miles away! I own a small 'park flyer' type Cox plane that uses 27.195, single channel control. |
david
| | Posted on Monday, May 28, 2001 - 2:54 pm: |
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Hmmm. I would almost think that if you were anywhere near an interstate highway with that thing, the bleedover from ch19 would interfere before any skip would cause trouble. I would also think that since the transmitter is so close to the receiver in an r/c setup, that it can't help but stomp out any other signal on that freq. I'd have to be putting out one hell of an FM carrier to cause problems. I'm talking about using 10 watts max for local comms...
I've also noticed that south and central american operators are getting onto the rc's more and more...Part of that is also this is the season for me in central usa to be hearing alot of those dudes... |
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