Hi Chris and LF
It seems every action has unintended consequences. In writing the mail below I was trying to make a point about the escalating use of band width per transmission. That Olivia thing is wide plus side bands, as Mal said. If you or I started using it, it really would mess up the band for both of us. Another mail said its OK because it is spread spectrum therefore we would not notice it. That in my opinion is tosh because as we both know I can read your key up signal (and probably you can read mine) which means an SS signal will have to be blooming small as not to be worth radiating not to be heard or interfere with local stations. People seem to be carried away with modes that compete with each other like Wireless LAN etc but the principal does not in IMHO compute when in proximity to other single frequency Amateur Radio QSOing modes especially CW. That what I was trying to say!
I take back any thing that I said that has offended you in any way and please end your moratorium on 500kc/s activity. I did not want this unintended result of my mail trying to support Mal.
This means I have had to retract nearly every thing I contributed on the support of narrow BW signals for 500kc/s. In future I will zip it!
I am sorry Adrian has dropped 500kc/s however he does come up on 80m and I bet he will not be able to resist listening and doing x band contacts.
73 petefmt Zipped!!!
From: Chris Osborn <[email protected]>
Subject: LF: 500 kHz - Silent majority
To: [email protected]
Date: Thursday, 8 January, 2009, 9:02 AM
I deduce that my (fairly) frequent transmissions on MF may be causing
some annoyance and inconvenience to local stations.
Consequently I shall be QRT on 500 kHz for the remainder of this month.
This will give local stations an opportunity to use a quiet band without
G3XIZ QRM.
I must report that sadly Adrian G4GDR has dismantled his MF equipment
and returned his N.O.V. to OfCom.
He was an active and keen MF operator and constructor but has lost interest due
to lack of activity.
I for one will miss him.
73 Chris G3XIZ
From: Dave G3WCB <[email protected]>
To: [email protected]
Sent: Monday, 5 January, 2009 22:22:55
Subject: RE: LF: Re: Silent majority
Dear LF,
Geri DK8KW and Markus did some interesting slow-voice experiments on 137 kHz a few years back.
Definitely not a DX-mode, and a bit of a bandwidth-gobbler too ;-)
73, Dave G3WCB IO91RM
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Hi LF
Since by general consent the 600m band is now wide open for experimentation of whatever computer aided mode that can be down loaded for free off the Internet. Might I suggest the use of SSTV. They say a picture is worth a 1000 words. I have thousands of holiday snaps I would like to share with the world by way of a 24/7 beaconing experiment. The result may be a bit more interesting than the shopping lists of stations worked, equipment lists and rig specifications that get churned out ad nauseam over the weekends.
I am not sure what my afore mentioned local Amateur Radio 600m op friends would feel being only a few miles away from my QTH.
No, the above suggestion is ridiculous. It does however, Einstein, Planck et al withstanding, beg the question; what is a suitable maximum bandwidth for the development of new modes on our British 3Kc/s 600m band? I will start the ball rolling by saying a BW no more than 50c/s. G3PLX managed with less than 32c/s BW. Since there is a QSB / QRN issue on this band then hand shaking could be introduced to ensure error free data transfer a bit like X25 slow but sure yet confined in a very narrow bandwidth say 50c/s max. We need to think outside the box and not try to shoe horn unsuitable modes onto 600m. To evoke names like Planck and co with all due respect to Alberto (who I admire immensely for his great innovations with DSP, SDR, FFT processing software) I think, is over the top. Nobody is into book burning and denial of
spectrum to impede progress but we only have 3kc/s to play with here in the UK. I consider myself a “grunt” operator not a highflying “Einstein” radio spectrum quantum mechanic, but I would hope we are trying to do more with less and I don’t think Olivia is the answer. Whatever modes are proposed and developed, I would expect one of the cardinal points in their specification, along with very narrow BW, to be compatibility with adjacent modes like CW and the effect on adjacent stations not running that particular mode.
In the mean time I am hoping to improve my manual CW skills assuming there are any stations still interested in that form of error correcting narrow band data transfer and are still prepared to QSO with me.
Now retreating into my cave with my knuckles dragging along the ground.
Vy 73 petefmt
--- On Mon, 5/1/09, Alberto di Bene <[email protected]> wrote:
From: Alberto di Bene <[email protected]>
Subject: LF: Re: Silent majority
To: [email protected]
Date: Monday, 5 January, 2009, 12:05 AM
Steve McDonald wrote:
>> There is virtually nothing new to discover or invent that has not
already
>> taken place on MF.
>
> There you go guys. You may as well stop your 600m experiments right now as
> Mal has proclaimed that there is "nothing new to discover".
Wouldn't it be
> wonderful if we could all see the future as clearly as he apparently does.
> What an amazing gift.
>
> VE7SL / Steve
This reminds me what Max Planck did write at the beginning of past century.
At the turn of the 20th century scientists were absolutely certain that there
was nothing more to be discovered in theoretical physics.
Max Planck, recalling the mood of optimism and conviction at that time, wrote:
“When I began my physical studies [in Munich in 1874] and sought advice from
my venerable teacher Phillipp von Jolly... he portrayed to me physics as a
highly developed almost fully matured science.... Possibly in one or another
nook there would perhaps be a dust particle or a small bubble to be examined
and classified, but the system as a whole stood there fairly secured, and
theoretical physics approached visibly that degree of perfection which,
for example, geometry has had already for centuries”.
The history of physics during the 20th century did show how dumb was that
point of view...
73 Alberto I2PHD
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