CB linear Amp

Groundwave doesn't exist at CB or 10 meter frequencies... well it does but it's distance is measured in feet, not miles.

 

I haven't seen a Pro-2001 in years, thanks for bringing back good memories.

 

There are limitations to the type of antennas that we can use on a truck. This is due to were the antenna has to be placed for it to work properly and height. You can't get a 102 inch antenna mounted on a truck low enough without taking out birds and low flying aircraft at the same time. Ok I am pushing it a bit but a 102 on a truck would be smacking every underpass or bridge as you go down the road. Heck it would probly hit some low haning power lines also. Yes I see low hanging power lines all the time.

Yes I can shoot skip on less then 100 watts. I did it briefly the other day. On channel 19 even. North West Minnesota to Hollywood Florida and later I was hitting another florida station from close to home here in NE North Dakota.

Skip has been rolling pretty heavy and it is drowning out the local stock 4 watt setups making comunications hard at anything past 3 miles. The noise levels are 7s + on most every channel the last few days. The 4 watt radios just can't seem to break through this noise level out past 2-3 miles. I can but then I am not running 4 watts either.

I like to shoot skip once and awhile and on noisy days, it was hard to do with even 400 watts. Especially when you have people that just won't let you talk. They go babbling on and on locking down the channel with their megawatts and the minute you key up they key up and won't let you say hi or give a wave.

 

i like your station friend there are a couple of ham operators in my region were i live i talk on the radio myself on 11 meters from time to time run a ranger rci 2950 dx in my mobile

 

YEARS AGO ......

I had a 2950, 2950dx and a 5054 dx they worked just fine ....

My stationi is set up so that I can run HF, VHF and UHF at the same time ..... Things have changed over the years

1966 ....


1986 ....


2006 .....



today .....



You can never have enough radios .....

 

I take it this guy fried all of his brain cells the first time he keyed up?

Another good point. I believe part of the noise problem comes from the dirty amps some CB operators like to use. The other part is due to the fact AM (what most CB is on) is susceptible to electrical noise. As for the skip thing...I blame the FCC here. They took a band that is known for it's long distance propagation characteristics (due to sun spots) and made it into a poor man's business band (what CB really is) and then made a rule you can't legally talk to someone past 155 miles. Really? Even on 4 watts (max CB output power) when the band is open (but quiet) you can talk much farther than 155 miles.

FCC should have allotted (IMO) the 1.25 meter (220 MHz) band to truckers...or maybe the MURS band (151 MHz)....that way you could run those little 4 ft antennas on your truck and it would be a full length antenna (not a compromise antenna [read: greatly hinders your range] like a 4 ft CB antenna is), your range would be real good, you wouldn't have near as much propagation (skip) plus it would be on FM so you wouldn't have all the interference issues.

They did try to petition this in the 70's, it was denied, which is where the 23 channels of CB finally evolved to 40. Yet the 1.25 meter band seldom gets used.

 

PART of the 220 band ...... but UPS grab it yep thank you arrl ......

220 is a great band I have been on it since 1974 ......

 

Sorry, but you're thinking of surface waves, which are one component of ground waves. On HF frequencies, most of the "ground wave" propagation is through the space wave portion. Most people use the term "ground wave" to avoid the confusion between "space wave" and "sky wave".

Nope. His antics were well known to the local FCC guys. When the same signal was heard, loudly, in three states, they knew who to call. He'd been inspected (raided) several times before. Fortunately, all his high power CB gear was useable on the ham freqs (he had a ham license), so they couldn't charge him with anything.

 

I was quite active on 220 when I lived in NorCal. Where I am now, I use the 220 side of the local club's repeater,since the QRN on 2m is full scale.

Next time I get to a "candy store", I'll probably pick up one of those Wouxun 2m/220 HTs.

 

I am familiar with the characteristics of ground wave,surface wave,direct wave and sky wave propagation and am pretty certain my comment is accurate.

[h=2]Effect of frequency on ground wave propagation[/h]As the wavefront of the ground wave travels along the Earth's surface it is attenuated. The degree of attenuation is dependent upon a variety of factors. Frequency of the radio signal is one of the major determining factor as losses rise with increasing frequency. As a result it makes this form of propagation impracticable above the bottom end of the HF portion of the spectrum (3 MHz). Typically a signal at 3.0 MHz will suffer an attenuation that may be in the region of 20 to 60 dB more than one at 0.5 MHz dependent upon a variety of factors in the signal path including the distance. In view of this it can be seen why even high power HF radio broadcast stations may only be audible for a few miles from the transmitting site via the ground wave.




http://www.radio-electronics.com/info/propagation/ground_wave/ground_wave.php