afaik walts site has gone,
you can read "another look at reflections" here http://homepages.ipact.nl/~pa1are/tuner/reflections.pdf
I have seen a 1:1 match on a 102 with no spring, but currently see a 1.7:1 and bonding on a kw log truck didn't help. Lots of factors, mine is driving me batty.
Well Eddie at first I thought I had you figured out and that you were just looking a little too hard at something. Then I thought that maybe I didn't quite have it figured out what you were trying to get across, note, not that I thought you were misunderstanding something but rather had problems expressing it. Now I don't know what to think. You obviously took what I said in the wrong context. I was not putting you down or anything other than suggesting that perhaps you were looking for the perfection that generally is impossible to obtain other than on paper.
Now I see this. "I could just shut up talking about my ideas. I think CP was suggesting that the other day when he posted that I was throwing known scientific facts out the window. I tried to tell him my part of the discussion was primarily about feed line length, and how it can effect the match at the feed point, and it was just my opinion, right or wrong. He told me he needed some rest."
NO Eddie I was NOT suggesting that you just shut up talking about your ideas. That is YOUR idea. You did seem to be simply rejecting facts and for some reason can't understand that the length of cable does not affect the match at the feedpoint. It does affect what the meter sees is the match when that meter is not located at the feedpoint.As for telling you I needed some rest before continuing the discussion well please excuse me. I have a job that involves working two 12 hr days followed by two 12 hr nights. I just came home from my last night shift as I told you. I had been up for something like 30+ hours with a 12 hr shift in the middle of that and had about 4-5 hrs sleep since the morning of the day before. Now that my head is indeed clear I can clearly see that it is both of our best interests if I do NOT continue any further with this.
the perfect 1:1 has nothing to do with 1/2waves and 1/2wave multiples have nothing to do with vswr on a matched or mismatched line,
you don't need a majic 1/2wave line in order to measure what the vswr is at the feed-point,
that's the part of the link i don't agree with,
all you need to know to calculate vswr at the antenna is vswr at the point of measurement, distance to antenna and line loss per mtr/foot etc,
vswr reduces smoothly the further away you move from the antenna due to coax loss,
changes in vswr with small changes in line length above what could be caused by any change in line loss indicate other issues such as common mode current changing the load impedance,
impedance looking into a mismatched line changes with line length, vswr ignoring line loss does not,
i think what you are getting at is how the complex rs and x readings change with line length on a mismatched line and how resonance measures at a different frequency as you change line length,
you are likely wondering if booty's majic 1/2wave feeder is leading him astray since he's measuring resonance at a frequency other than where his majic feeder is cut for or is he wasting his time with 1/2waves,
some software for vna's can do the maths/spin the smith chart for you and tell you the conditions at the feed-point or any other point on the line by calculating out the coax effects as somebody else pointed out in a different thread,
an example of how this works, look at the scans around 146.5mhz, impedance changes, resonant frequency changes but vswr stays about the same when he calculates the coax out of the readings,
Constructing a 2m colinear Part 2 « waynemerry
you beat me to it it is what you are getting at
I won't feed anymore into the personal comments here. You know I was just giving back a little of what I got. Like I told #6, I don't bite.
I'll do the same as you CK suggest, and call this a failure to communicate and stop. I'm probably talking to myself anyway.
This is my own opinion and I may get heat for it, but 2:1 is fine, I have worked my radios and my DX500V into 2:1 swr for hours before at Approx 350 watts output.
The time it becomes a problem is if you have a high dollar radio with high VSWR protection built in, or you have the thing running at redline.
A lot of CB radios will work into a 2:1 swr almost infinitely at the rated output of the radio, it is when the radios are "peaked and tweaked" or amps are run at the edge of their ratings that it becomes a concern.
Example is X-Force, they say that your SWR must be under 1:3 to 1, this is because they often rate the amp at the extreme edge of output, with voltage in excess of 13.8 volts.
Ever notice that some SWR meters show a red line at 3:1 ?
Or that experienced operators say that the guy on the other end will never know the difference between 1:3 and 1:8 ?
Alternative, what alternative? You don't have to be scared to say what you mean with me #6, "...I don't bite, I ain't got no teeth." :thumbdown:
I could just shut up talking about my ideas...he posted that I was throwing known scientific facts out the window.
If you answer yes, then I will shut up and say my idea here is not right.
I don't know what da fuk your problem is, do you take medicine? or perhaps drink a lot?
it's an old JOKE,..........
the "alternative" is not getting any older,.............. Gomer.:angry:
just because you repeat the same incorrect concepts over and over and over again will not change accepted FACTUAL information...... as you were told by others in this thread.
oh, by the way,.................