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Author Topic: AH8DX copies callsign at 500 wpm!  (Read 11184 times)

Posts: 2994

« Reply #15 on: March 05, 2012, 02:58:45 PM »

And now I can say for sure BS

Sez you.  That's not very sportsman like.  I would think you would also congratulate Craig on his accomplishment.   

Posts: 0

« Reply #16 on: March 05, 2012, 04:18:07 PM »

Waveform have nothing to do with it... your element doesn't "fit" inside one cycle...

I do not agree.

Even when you switch one cycle of a sine wave on and off, periodic, the spectrum is that carrier available the full time as a constant carrier of constant amplitude and sidebands of the envelope, in this case of a block wave.

So 700 Hz carrier and sidebands at 350 Hz above and below etc, also folded for a series dots.

AND it is certainly true that you can have a sinewave carrier at 700 Hz with a triangle envelope, just by multiplying the sinewave with the triangle of the same period duration. That yields another smoother spectrum.  6 dB per octave, because a triangle is the integral of a block. It is also possible to switch part of a sinewave on and off. Makes no difference in mathematical handling of the subject.

So that is what I remember from the theory acquired for my ham license. Long time ago, but laws of nature don't change fast, do they?

I think AH8DX is a honest guy, he is very fanatic in exercising, and his approach was obviously specialising on speed not on points.

So he just starts a session in RUFZXP on the highest possible speed, and breaks is off when he did not copy a call above his recorded highest speed.

So a hundred sessions can be broken off, and then bingo. He doesn't claim according to the rules that he copies every run this high speed, once in a time, and due to the large database of about 50000 calls, his records promise to be more then good luck.

So he just hits the enter repeatedly when he copied ONE call, because his only purpose is to record the max speed obtained.

He had a wordpress website, where he published screenshots, showing his progress. A lot of calls with one error. And now he manages to copy at the highest speed sometimes a fully correct call. A short and easy one such as W1OO or a long one because he remembers that one as present in the database when he partially copies it.

Must be physiologically possible when you compare the bandwith with the bandwidth of the ear, and when you compare the complexity of speech with Morse code. The working of the brain is unknown. So when it is done it is possible.

Every guy is as far as I know starting at low speed an trying to increase that, at around 50 wpm meeting some ceiling, possibly because the brain detects high speed Morse as a spectrum and low speed as a time changing signal.
He was exercising the other way around.
Did you ever try to do a Koch course with 800 wpm? It is possible to distinguish two characters, try it and you know it,  and then 3 etc.
I expect he did that.

I think it is not fair to deny that somebody managed to do that after years of exercising, on an unusual path.
So I surely congratulate Craigh,

« Last Edit: March 05, 2012, 04:22:20 PM by PA0BLAH » Logged

Posts: 2994

« Reply #17 on: March 06, 2012, 06:20:14 AM »

My purpose in starting this discussion topic was to simply marvel at an outlier performance by one outstanding individual in the art of QRQ Morse.  As someone who has practiced CW for many years, I think it is fascinating to observe what others have proven possible. When I think of the QRQ facet of this hobby, people like DJ1YFK, W4BQF, W9FCX, K0HA, and W5UX come to mind.  Each one of these guys has encouraged me, and I think of them as fellow fraternity members.

So Craig, AH8DX, a newer member of this fraternity, has taken QRQ to a new level.  I think that is worthy of note, and I do not apologize for bringing it up.  I did so without Craig's knowledge, and it was only after he read this topic that he sent me an e-mail telling me of his latest attempts in the Training Mode of the RufzXP program. 

I can understand a healthy skepticism concerning an outlier performance by a relative newcomer to the sport of QRQ.  I am disappointed, though. that an otherwise worthy competitor would take such nasty potshots in this forum. 

To "PA0BLAH," Bob;  Your points 1 and 2 are understood, and I thank you for your contribution to this discussion. 

Chuck  NI0C

Posts: 7

« Reply #18 on: March 07, 2012, 07:52:29 AM »

I have corresponded with Craig and he told me he plans to participate in HST2012 in Switzerland.  Should be interesting!
Barry W2UP (falling in the RUFZ ranks  Sad )

Posts: 0

« Reply #19 on: March 07, 2012, 11:15:03 AM »

I have corresponded with Craig and he told me he plans to participate in HST2012 in Switzerland.  Should be interesting!
Barry W2UP (falling in the RUFZ ranks  Sad )

Come on, You, yes you, and you know that very well,  are right now the best  40 plus ranked USA representant.
And being not Russian import as K0TF.

I do not know the regulations, as far as I knew it was two runs Rufzxp allowed, the best one counts, and when AH8DX catches one call correct at top speed in over 100 runs, the rest rubbish, there is a lot of work to do in order to crank that up to the level one out of 2 runs.

But may be you got the wrong press because you rejected him another year in the past and adviced to educate his sun in HST instead of baseball. Don't know. Gossips are in ham radio world wide within one day with hot condx and wide open 20 m as you know.

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