Hellschreiber on LF

[Bob Bruhns]

It looks like the site I stumbled upon, that gave me the Hellschreiber
idea in the first place.  I'm working now on putting "AMRAD", in our
website's latest font, on the waterfall or snakeskin spectral screen for
Thursday's meeting.

- Bob, WA3WDR

Andre' Kesteloot wrote:
> 
> Hi Gang,
> 
> The other Saturday at Tacos Bob Bruhns was discussing the possibility of using
> Hellschreibers on LF (with a waterfall type display).
> The URL site mentioned below by ZL1BPU gives an excellent overview of
> Hellschreibers, along with graphical examples.
> This looks like a great way to go (and fun too)
> Please check it out when you have a moment.
> 73
> Andre'
> *****************************************
> 
> > ------- Forwarded Message Follows -------
> > From:          murrayg@indcom.co.nz
> > Date:          Thu, 3 Sep 1998 11:29:29 +1200
> > To:            C.Trayner@elec-eng.leeds.ac.uk
> > Subject:       MT-Hell on LF
> >
> > Hi Chris,
> > I am writing to you because you seem to be "in charge" of the EuLF
> > Home Page, and are likely to know as much as anyone about the subject!
> >
> > I feel that multi-tone Hellschreiber, in particular sequential MT-Hell, has a
> > useful application in LF transmission, where weak signals and the ability
> > to identify them is more important than data communication speed.
> >
> > My question to you is, do you know of anyone using, or interested in
> > using MT-Hell to modulate or ID  their LF transmissions in the UK?
> >
> > As you probably realise, we have an LF band in New Zealand - 160 to
> > 195 kHz, with most action centred on 181 kHz. There are probably a
> > dozen active stations in ZL, and several have been heard in VK, where
> > there is an experimental allocation, but no corresponding Amateur band.
> > As yet none of the ZL LFers use MT-Hell, but I'm working on them!
> >
> > If you are interested in the weak signal advantages of MT-Hell, which is
> > much simpler to use and cheaper to implement than most advanced digital
> > modes, check out the following web site:
> >
> > http://members.xoom.com/ZL1BPU/Contents.html
> >
> > 73,
> >
> > Murray ZL1BPU, ex G0PFG