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SOUNDS FROM VARIOUS HELLSCHREIBER MODES AND MACHINES:

	Feld Hell
	Feld-Hell QSO (18 minutes recording of the weekly Sunday euro Hell Net on 3577-3582 kHz at 15:00-15:30 UTC; recorded on 14 sept 2008 by Bill, KA8VIT, via this great web-SDR in The Netherlands)
	Hell-72 GL - character set
	Hell-80: Hell-80 (actual QSO with start-stop and synchronous transmissions) Hell-80 (sychronous mode) Click here for a recording of a real Hell-80 transmissions (both start-stop and synchronous mode). Recorded 1 March 2010 around 7050 kHz. File size: 13 MB. Click here for ca. 4 minutes Hell-80 QSO, start-stop mode, 24-Jan-2011 - Part 1 Click here for a scan of the associated paper tape print-out Click here for ca. 4 minutes Hell-80 QSO, start-stop mode, 24-Jan-2011 - Final
	Click here for a recording of the audio of the Thomson Hellschreiber (10 MB .wav file, 2x full character set), can be printed with Feld-Hell (set to about 1250 Hz), or in Hell FM105/254 mode (set to the 1325 Hz "space" tone).
	Hell FM-105
	Hell FM-245
	Hell PSK-105
	Hell PSK-245
	C/MT Hell -  text appears in waterfall display
	Duplo Hell

These recordings can be used to test your Hellschreiber or Hellschreiber software and receiver-PC interface. I have put FFT spectra and waterfall displays for these modes on the "Modern "software" modes (FM, MT, etc.)" page.
 

Dr. Hell gave an interview for his biography. Ref. 1. Audio clips of the interview are on the "History and patents" page.

Ref. 1: "Dr.-Ing. Rudolf Hell: Der Jahrhundert-Ingenieur im Spiegelbild des Zeitgeschehens. Sein beispielhaftes Wirken." ["Dr.-Ing. Rudolf Hell: engineer of the century"], by Boris Fuchs and Christian Onnasch, Edition Braus, Wachter Verlag, 2005, ISBN 3-89904-163-1, 280 pp.

©2004-2009 F. Dörenberg N4SPP

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