My point is for the majority of people in this forum Ridgeline's advice is invaluable.
For the few of us that like to experience things Beyond what Ridgeline thinks is possible lots of his advice becomes useless to us. He can only advise you on how to accomplish results comparable to the limitations of his station. If you want to go beyond those limitations a lot of what he says has to be tossed out the window.
This should raise some eyebrows
Discussion in 'CB Radio Forum' started by rabbiporkchop, May 28, 2016.
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Hey Rabbi,
I don't have much to defend myself with, mainly because I don't feel I have to defend myself. After 40 years of this crap, it is typical of many places to put up info to counter what's been said and proven.
Two things that I do want to point out is the first having to do with Mark, and his work. I may have one of his radios, it may be sitting right in front of me or on the desk behind me. I won't say. I never said he was a bad tech but rather countering this image some of you give him. I may have talked to him in the past, but my go to guy knows him well enough to vouch for him and his work, maybe that's why I have a radio with his finger prints on it.
I will repeat this again the -135 dBm noise floor is not important, for a lot of reasons. One is that for the most part in much of the country there are a number of issues with band noise that has a floor of ... ready? ... -100 dBm average on the 11 meter band. SO having that 35 extra given to the floor means nothing. The same goes for the other calculated figure that is far more important - dynamic range. No one seems to talk about that, even though it is far more important than the noise floor. It is derived by both the noise floor and the noise figure that comes from testing - this doesn't come from an ARRL publication but a bunch of engineers who design radio equipment.
Going hand in hand with that is the rest of the radio - where the noise figure is created, I don't hear anyone fixing the internal if strip noise but seem to ignore it. The same with the detector stage. No one seems to understand how that works.
All of what he has done has been done before.
The second thing is my experiencing things, what a joke. I've done a lot on CB in the past, more with ham, that's why I'm a ham and not a "cb'er". I have a record of what I've done and it is a lot more than talking skip on a CB. Not saying that's bad but I strived for more. I haven't yet tackled EME because the new house will have the antennas fir that I don't have setup at the cabin or the homestead, but I have done meteor scatter, SS and a bunch of other things that are wickedly amazing. You would love it if you had the chance.
However, don't think what I posted is a limitation, it is about sharing knowledge and when you come up with things that don't matter, then I will post an alternative. I still would like to know how one tests coax or if you understand what the difference between a balanced feed line and an unbalanced feed line is - both of those issues has a lot to do with cbs and trucks.
So I've got to go. been a busy weekend and need to put in another 65 hours this week of actual work, can't play like this all the time.rabbiporkchop Thanks this. -
Let me refresh your memory..
RidgelineRoad Train Member
I know where Drums is, north of hazelton and I've never had an 80 mile straight shot on 11 or 10 meters from there.
The last time I was there, the best I did with any "non-skip" contact was 40 miles on 10 meters with 150 watts going into a portable NVIS antenna and the other guy was a fixed location.
I'm leaning towards you having a NVIS moment with that contact, because I don't think tropo ducting happens that low frequency.
You are correct that unless we do things a certain way to eliminate the noise from our vehicles the noise floor of the radio is totally useless. There are several things we can do To eliminate interference to our receivers.
Last edited: May 30, 2016
Reason for edit: noisy receive -
Your article is a very good read. However I don't see were it supports your position.
First thing is the article first discussion is at 400 mhz. Which is what Ridgeline spoke about.
Secondly, The worst connector in the CB world is the PL-259.
If you truly want a low noise get a low noise preamp.
leon
kc0ivrabbiporkchop Thanks this. -
All I can offer is my experiences. I am unable to offer much scientific data other than my personal experiences. If those experiences Surpass what is commonly accepted as possible there must be some sort of scientific explanation but I am unable to give an explanation. All I can do is offer to duplicate what some people consider impossible. I'd love to solve the mystery but I don't have the technical expertise to do so.
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