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Topic: Hellschreiber

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	Hellschreiber - Wikipedia, the free encyclopedia
		The Hellschreiber or Feldhellschreiber was a facsimile-based teleprinter invented by Rudolf Hell.
		A fl pixel is transmitted as a signal, and a white pixel is transmitted as silence.
		Hellschreiber has also spawned a number of variants over the years, many of them due to radio amateur efforts in the 1990s.
	en.wikipedia.org /wiki/Hellschreiber (449 words)

	Hellschreiber (Site not responding. Last check: 2007-10-23)
		The top section of the interface consists of the Hellschreiber control panel, the middle section is the receiver section, the next section down is the transmitter section with macro buttons below it, and the usual QSO Info strip at the bottom most.
		Hellschreiber characters are typically sent as a 5x5 dot matrix inside a 7x7 matrix.
		Since Hellschreiber does not send a synchronization bit in the data stream, the bits of the received character can be out of phase with the bits of the transmitted character.
	homepage.mac.com /chen/cocoaModemPage/UsersManual/hellManual/index.html (1891 words)

	Hellschriber - Wikipedia, the free encyclopedia
		It has been suggested that this article or section be merged into Hellschreiber.
		Hellschriber is a data transmission mode that is truly international and independent of character sets: any thing that can be depicted as markings within a 7 pixels high grid (49 pixels), can be transmitted over the air.
		In the same year Hell invented an apparatus called the Hellschreiber, an early forerunner to the fax.
	en.wikipedia.org /wiki/Hellschriber (699 words)

	Hellschreiber
		Hellschreiber was the first successful direct printing text transmission system, and was very popular at a time when teleprinters were complex and expensive (the Hell receiving mechanism had only two moving parts).
		At first the Hellschreiber was mostly used for land-line press services, which continued well into the 1980s.
		During WWII, Hellschreiber was widely used for field portable military communications, for which it proved to be very suitable because the equipment was simple and robust.
	www.hffax.de /history/html/hellschreiber.html (327 words)

	AARC The Albemarle Amateur Radio - Feature Page (Site not responding. Last check: 2007-10-23)
		Hellschreiber was the one of the earliest technologies for sending information over radio, predated only by Morse Code.
		Yet, today modified Hellschreiber is considered one of the most effective modes for sending text in weak signal conditions, with Morse itself still the recognized leader.
		Hellschreiber does not have the popularity of PSK or MFSK, so it can be a bit more difficult to find someone to have a QSO.
	nvhamkids.hopto.org /hells_code.htm (676 words)

	Hellschreiber
		Hellschreiber, and related modes are analogue, human readable, uncoded, direct viewing or printing modes, and so are truly
		Hellschreiber describes a method of sending text by radio or telephone line that involves dividing each text character into little pieces and sending them digitally.
		The traditional method of sending Hellschreiber is to key a Morse transmitter ON for every fl spot in a text character, and OFF for every white spot.
	www.xs4all.nl /~eeuwen/hellschreiber.htm (681 words)

	MM0BQM-Hell (Site not responding. Last check: 2007-10-23)
		Hellschreiber describes a method of sending text by radio or telephone that involves dividing each text character into little pieces and sending them digitally.
		Hellschreiber is a German name, meaning "bright writing", or "clear writing", and is a pun on the name of the inventor, Rudolf Hell, who patented Hellschreiber in 1929.
		The traditional method of sending Hellschreiber is to key a morse transmitter ON for every fl spot in a text character, and OFF for every white place.
	www.zen103534.zen.co.uk /mm0bqm/hell.htm (214 words)

	K4JCW - Hellschreiber
		Hellschreiber is a mode that was patented back in 1929, by Rudolf Hell.
		Hellschreiber was used originally for passing newspaper headlines.
		Hellschreiber, like Morse, takes advantage of the signal processing capabilities of the human brain.
	www.tinymicros.com /amateur/digital/hellschreiber.html (591 words)

	A History of Hellschreiber (Site not responding. Last check: 2007-10-23)
		Hellschreiber, the first really successful Facsimile mode, is as old as electronics itself.
		Hellschreiber is a method of sending text by radio or telephone line that involves dividing each text character into little pieces and sending them as dots.
		Hellschreiber was invented by the German inventor, Rudolf Hell, who patented Hellschreiber in 1929.
	www.qsl.net /zl1bpu/FUZZY/History/History.html (1930 words)

	HELLoIP - CWirc Hellschreiber extension
		Hellschreiber (and FeldHell, the variant implemented by gMFSK), is a radio and landline digital mode transmission invented in 1929.
		Note: it is normal in Hellschreiber mode to see the received text slant up or down a little, since the transmission format has no provision for sender/receiver synchronization.
		When gMFSK sends Hellshreiber with CWirc, depending on the Hellschreiber font you selected, the amount of traffic that's sent to the IRC server is the equivalent of regular Morse at 100 to 150 WPM.
	users.skynet.be /ppc/helloip (663 words)

	Hellschreiber (Site not responding. Last check: 2007-10-23)
		The Hellschreiber is an early faximile communication, where only upper case letters were transmitted and received.
		Hellschreiber is an asynchronous transfer mode where the signal is discretely coded.
		Ham Radio December 1979, Hellschreiber, a Rediscovery by PA0CX.
	home.c2i.net /clank/ham/hell/hell.html (262 words)

	Hellschreiber, a rediscovery
		The Hellschreiber is a teleprinting machine on a principie entirely different from that of the RTTY teleprinter.
		In contrast to the RTTY machine, in which received pulses determine the character to be printed, the Hellschreiber uses the transmitted pulses to directly write images of characters on paper tape.
		When all other means of communications failed, often the Hellschreiber managed to get the message through, even when only barbed wire and an earth connection were available as a signal path.
	home.c2i.net /clank/ham/hell/hr_dec79.html (846 words)

	Club for Hellschreiber fans
		Fans of Hellschreiber, a digital mode that prints words across your computer screen like a teleprinter, might be interested to hear that a new club dedicated to Hellschreiber has recently been formed in the UK.
		Hellschreiber – or Feld Hell as it is commonly known – was originally patented in 1929 by Rudolf Hell and used extensively in portable field operations during the Second World War.
		Unlike teleprinters, Hellschreiber machines had only two moving parts and so were mobile and dependable.
	www.southgatearc.org /news/april2006/hellschreiber_club.htm (159 words)

	Frank's N4SPP Hellschreiber page
		The Hellschreiber or Typenbildfeldfernschreiber was invented in Germany by Rudolf Hell in 1929.
		Here is a CQ-call, and here is an other sample (these sound files can be used to try out Hellschreiber software).
		The website of the Hellschreiber Club (I'm member number 24) is here.
	www.nonstopsystems.com /radio/frank_radio_hell.htm (623 words)

	Silicon Chip Online - Hellschreiber - Revisited
		In some ways, Hellschreiber may be thought of as a forerunner to modern-day facsimile machines, since it writes an image to paper.
		Stan talked about the free Hellschreiber software available on the ’net and then went on to describe how it could be used on the "data only" channels 22 and 23 of the Australian UHF CB radio system, along with a suitable computer and sound card.
		Stan supplied a photograph of a Hellschreiber transceiver (published on page 42 of that issue), which he had obtained from an obscure site on the ’net (good old Google!) and could not determine who, if anyone, claimed to own the copyright.
	www.siliconchip.com.au /cms/A_104977/printArticle.html (733 words)

	Fax - Wikipedia, the free encyclopedia
		Radio fax is still in common use today for transmitting weather charts and information.
		An early method for facsimile transmission, the Hellschreiber, was invented in 1929 by Rudolf Hell, a pioneer in mechanical image scanning and transmission.
		In 1985 Dr Hank Magnuski, founder of GammaLink, produced the first computer fax board, called GammaFax.
	en.wikipedia.org /wiki/Fax_machine (1504 words)

	Andrew's radio hobby
		My great interest in amateur radio is the Hellschreiber.
		The latest developments in the Hellschreiber mode have been done using computers and digtal, synthetic filters.
		Links to other information about the Hellschreiber will be posted as and when I get the time to do them.
	www.lovell-info.se /radio.htm (168 words)

	Hellschreiber (Site not responding. Last check: 2007-10-23)
		Hellschreiber, a 70-year-old mode halfway between CW and fax, is German for "shiny writing." It's also a play on the name of its inventor, Dr. Hell.
		What we see here is Feld-Hell, "Field Hell," which was used a lot in World War II (war is Hell?).
		Hams are raising Hell because it's great for DX, it does well with computer DSP, and it's just good, strange fun.
	www.ominous-valve.com /hell.html (184 words)

	Hellschreiber (Site not responding. Last check: 2007-10-23)
		Hellschreiber was patented in 1929, and is still in use today using the original format.
		For a lot of info on Hellschreiber check out the Feld Hell Club web page
		This a compilation of suggested HELL frequency ranges and will be modified as other inputs are received.
	www.w0kcf.net /hell.html (236 words)

	The history of amateur radio - 15
		Unlike all other digital modes discussed so far, Hell displays the signal on your screen like does a fax or your television using facsimile technology.
		There are several versions of Hellschreiber, two of them being mostly used : the Feld-Hell, single-tone, mainly used on HF.
		Based on MFSK developed by 1935 by L. Devaux and F. Smets it is similar in many aspects to Hellschreiber "fuzzy" image mode, as it used the human pattern recognition ability to read the text, and the signals are not encoded.
	www.astrosurf.org /lombry/qsl-ham-history15.htm (2505 words)

	Hellschreiber on LF (Site not responding. Last check: 2007-10-23)
		Hi Gang, The other Saturday at Tacos Bob Bruhns was discussing the possibility of using Hellschreibers on LF (with a waterfall type display).
		This looks like a great way to go (and fun too) Please check it out when you have a moment.
		> > 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.
	www.amrad.org /pipermail/tacos/1998/000409.html (300 words)

	Hellschreiber on LF
		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.
		> > > > 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.
	www.rf.org /pipermail/tacos/1998/000411.html (301 words)

	HF-FAX
		For more info on Hellschreiber you should first check Murray´s ZL1BPU Pages wich is the best source on the net.
		You can find Hellschreiber transmissions during weekends at 14063.5 KHz LSB (13:00 UTC mode Feldhell), also on 7037 KHz and 3580 KHz LSB (Tuesdays 20:00 UTC) for Europe.
		Check also 3560 KHz LSB at 08:00-09:30 UTC for the "Hellraisers" Net or the DX Hell frequencies at 10140, 14063.5 or 21063.5 KHz LSB between 05:00 and 10:00 UTC.
	ourworld.compuserve.com /homepages/HFFAX/hf-fax.HTM (1101 words)

	Hellschreiber (Site not responding. Last check: 2007-10-23)
		Such signals are very sturdy to radio noise.
		The hellschreiber was invented by Dr. Rudolf Hell in 1929.
		It was used by the Germans during WW2 and some receivers was built by the British and Americans to intercept enemy communications.
	www.kvindesland.no /la9iha/hell/hell.html (259 words)

	ARRLWeb: In Brief - Jan 27, 2000
		Questions or comments on the content of the database should be directed to Industry Canada's Amateur Radio Service Centre as indicated on the Web site.
		W1AW now QRV on Hellschreiber: W1AW made its first-ever Hellschreiber QSO January 19 with Raffaele, IK4PKQ.
		Hellschreiber will be among the modes available for use by visitors to W1AW.
	www2.arrl.org /news/stories/2000/01/27/1 (1511 words)

	ARRLWeb: In Brief - Jan 18, 2000
		Hellschreiber Activity Day set: January 29, 2000, 0000-2400 UTC, has been set as the date for the first Hellschreiber Activity Day.
		The event is not a formal contest but a way to promote Hellschreiber as a serious DX mode and to celebrate the 98th birthday of Rudolf Hell, who invented Hellschreiber.
		Participants exchange "honest reports, locator and name." To keep track, QSOs count one point (work stations once per band), with an extra point for Duplo-Hell or PSK-Hell QSOs, for working from or to a mechanical Hell machine, or for working a portable station (ie, operating from "emergency" power).
	www.arrl.org /news/stories/2000/01/18/1/?nc=1 (2302 words)

	QRSS Beacon: QRV: Hellschreiber Tests (Site not responding. Last check: 2007-10-23)
		I have since found out that what I was sending is a form of Sequential Multi-Tone frequency doman Hellschreiber (S/MT-Hell), which is a mode occasionally used on HF bands but obviously at a higher speed.
		The version I sent was similar to the official S/MT-Hell, except at much slower speeds.
		I also received some nice shots of the complete callsign from Peter DF3LP in Kiel (see right).
	www.hanssummers.com /radio/qrss/qrv/hell (512 words)

	WB8NUT's Amateur Radio Digital Modes Information and Download Page
		HELLSCHREIBER is a method of sending and receiving text using facsimile technology.
		The recent use of PC sound cards as DSP units has increased the interest in Hellschreiber and many programs now support this new...well I mean, old mode.
		MT63 is a new DSP based mode for sending keyboard text over paths that experience fading and interference from other signals.
	www.wb8nut.com /digital.html (2020 words)

	NB6Z's "digital ham radio" (Site not responding. Last check: 2007-10-23)
		This mode has been around along time; the recent use of PC sound cards as DSP units has increased the interest in Hellschreiber.
		In order to do this, a number of rules are required, to ensure that any electronics or logic circuitry is not allowed to make decisions which may be less inspired than human decisions.
		Examples of potentially Fuzzy modes are Morse Code, HFFAX, SSTV and Hellschreiber.
	home.teleport.com /~nb6z/about.htm (1977 words)

	Hellschreiber, a rediscovery - comments K6KA
		Click here to see the original article from HR dec.-79.
		The December issue of ham radio describes the Hellschreiber typing keyboard machine, and the article mentioned that the shortest pulses are 8.16 ms, producing a speed of 122.5 baud and a minimum bandwidth of 61 Hz.
		Unfortunately for the system, the abrupt rise and fall times involved are quite broad.
	www.kvindesland.no /la9iha/hell/hr_k6ka.html (260 words)

	PSK31 : Operating Modes: PSK31
		The digital modes are easy to set up and get operating, require low power and a narrow band.
		Its data rate is 31.25 bauds (about 50 word-per-minute), and its narrow bandwidth (approximately 60 Hz at -26 dB) reduces its susceptibility to noise.
		PSK31 and Hellschreiber - Exaustive introduction to PSK31 and Hellschreiber by Bob Rushby
	www.dxzone.com /catalog/Operating_Modes/PSK31 (383 words)

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