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		<id>https://www.hfunderground.com/wiki/index.php?action=history&amp;feed=atom&amp;title=Hellschreiber</id>
		<title>Hellschreiber - Revision history</title>
		<link rel="self" type="application/atom+xml" href="https://www.hfunderground.com/wiki/index.php?action=history&amp;feed=atom&amp;title=Hellschreiber"/>
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		<updated>2026-10-21T22:23:54Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
		<generator>MediaWiki 1.16.5</generator>

	<entry>
		<id>https://www.hfunderground.com/wiki/index.php?title=Hellschreiber&amp;diff=4010&amp;oldid=prev</id>
		<title>Strange Attractor: HELL moved to Hellschreiber: Full name, leave HELL as a redirect</title>
		<link rel="alternate" type="text/html" href="https://www.hfunderground.com/wiki/index.php?title=Hellschreiber&amp;diff=4010&amp;oldid=prev"/>
				<updated>2010-09-04T04:13:04Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;a href=&quot;/wiki/index.php/HELL&quot; class=&quot;mw-redirect&quot; title=&quot;HELL&quot;&gt;HELL&lt;/a&gt; moved to &lt;a href=&quot;/wiki/index.php/Hellschreiber&quot; title=&quot;Hellschreiber&quot;&gt;Hellschreiber&lt;/a&gt;: Full name, leave HELL as a redirect&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
		&lt;tr valign='top'&gt;
		&lt;td colspan='1' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='1' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 04:13, 4 September 2010&lt;/td&gt;
		&lt;/tr&gt;&lt;/table&gt;</summary>
		<author><name>Strange Attractor</name></author>	</entry>

	<entry>
		<id>https://www.hfunderground.com/wiki/index.php?title=Hellschreiber&amp;diff=3900&amp;oldid=prev</id>
		<title>Strange Attractor at 22:54, 20 August 2010</title>
		<link rel="alternate" type="text/html" href="https://www.hfunderground.com/wiki/index.php?title=Hellschreiber&amp;diff=3900&amp;oldid=prev"/>
				<updated>2010-08-20T22:54:56Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
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			&lt;col class='diff-content' /&gt;
		&lt;tr valign='top'&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 22:54, 20 August 2010&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;-&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;HELL (&lt;/del&gt;Hellschreiber&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;) &lt;/del&gt;is a so called [[fuzzy mode]]. It was invented by Dr. Rudolf Hell in the 1920s. In this mode, the message is transmitted as raw pixels, with the operator viewing the received image and mentally filtering out interference.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;[[Image:FeldHell44.jpg|thumb|right|Feldhell apparatus]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;nbsp;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;'''&lt;/ins&gt;Hellschreiber&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;''' or '''Hell''' &lt;/ins&gt;is a so called [[fuzzy mode]]. It was invented by Dr. Rudolf Hell in the 1920s. In this mode, the message is transmitted as raw pixels, with the operator viewing the received image and mentally filtering out interference.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Hellschreiber saw limited use until World War II. During World War II the standard mode of Hellschreiber was used by the German Army and was nicknamed ''Feldhell''. &amp;nbsp;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Hellschreiber saw limited use until World War II. During World War II the standard mode of Hellschreiber was used by the German Army and was nicknamed ''Feldhell''. &amp;nbsp;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;-&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Recently it has become popular with a subset of the [[&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Amateur radio|ham &lt;/del&gt;radio]] community. &amp;nbsp;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Recently it has become popular with a subset of the [[&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;amateur &lt;/ins&gt;radio]] community. &amp;nbsp;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category: Transmission modes]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category: Transmission modes]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Strange Attractor</name></author>	</entry>

	<entry>
		<id>https://www.hfunderground.com/wiki/index.php?title=Hellschreiber&amp;diff=3657&amp;oldid=prev</id>
		<title>Strange Attractor at 14:05, 29 July 2010</title>
		<link rel="alternate" type="text/html" href="https://www.hfunderground.com/wiki/index.php?title=Hellschreiber&amp;diff=3657&amp;oldid=prev"/>
				<updated>2010-07-29T14:05:36Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
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			&lt;col class='diff-content' /&gt;
		&lt;tr valign='top'&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 14:05, 29 July 2010&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;-&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;HELL (Hellschreiber) is a so called [[fuzzy mode]]. It was invented in the 1920s, and saw limited use until World War II. &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;It &lt;/del&gt;has become popular &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;today &lt;/del&gt;with a subset of the [[ham radio]] community&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;. The message is transmitted as raw pixels, with the operator viewing the received image and mentally filtering out interference&lt;/del&gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;HELL (Hellschreiber) is a so called [[fuzzy mode]]. It was invented &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;by Dr. Rudolf Hell &lt;/ins&gt;in the 1920s&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;. In this mode&lt;/ins&gt;, &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;the message is transmitted as raw pixels, with the operator viewing the received image &lt;/ins&gt;and &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;mentally filtering out interference.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;nbsp;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;nbsp;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Hellschreiber &lt;/ins&gt;saw limited use until World War II. &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;During World War II the standard mode of Hellschreiber was used by the German Army and was nicknamed ''Feldhell''. &lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;nbsp;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;nbsp;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Recently it &lt;/ins&gt;has become popular with a subset of the [[&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Amateur radio|&lt;/ins&gt;ham radio]] community. &amp;nbsp;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category: Transmission modes]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category: Transmission modes]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Strange Attractor</name></author>	</entry>

	<entry>
		<id>https://www.hfunderground.com/wiki/index.php?title=Hellschreiber&amp;diff=1376&amp;oldid=prev</id>
		<title>Cosmikdebris at 01:09, 29 October 2007</title>
		<link rel="alternate" type="text/html" href="https://www.hfunderground.com/wiki/index.php?title=Hellschreiber&amp;diff=1376&amp;oldid=prev"/>
				<updated>2007-10-29T01:09:49Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
		&lt;tr valign='top'&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 01:09, 29 October 2007&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;HELL (Hellschreiber) is a so called [[fuzzy mode]]. It was invented in the 1920s, and saw limited use until World War II. It has become popular today with a subset of the [[ham radio]] community. The message is transmitted as raw pixels, with the operator viewing the received image and mentally filtering out interference.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;HELL (Hellschreiber) is a so called [[fuzzy mode]]. It was invented in the 1920s, and saw limited use until World War II. It has become popular today with a subset of the [[ham radio]] community. The message is transmitted as raw pixels, with the operator viewing the received image and mentally filtering out interference.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;nbsp;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;nbsp;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;[[Category: Transmission modes]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Cosmikdebris</name></author>	</entry>

	<entry>
		<id>https://www.hfunderground.com/wiki/index.php?title=Hellschreiber&amp;diff=232&amp;oldid=prev</id>
		<title>WikiSysop: New page: HELL (Hellschreiber) is a so called fuzzy mode. It was invented in the 1920s, and saw limited use until World War II. It has become popular today with a subset of the ham radio com...</title>
		<link rel="alternate" type="text/html" href="https://www.hfunderground.com/wiki/index.php?title=Hellschreiber&amp;diff=232&amp;oldid=prev"/>
				<updated>2007-09-14T12:52:49Z</updated>
		
		<summary type="html">&lt;p&gt;New page: HELL (Hellschreiber) is a so called &lt;a href=&quot;/wiki/index.php?title=Fuzzy_mode&amp;amp;action=edit&amp;amp;redlink=1&quot; class=&quot;new&quot; title=&quot;Fuzzy mode (page does not exist)&quot;&gt;fuzzy mode&lt;/a&gt;. It was invented in the 1920s, and saw limited use until World War II. It has become popular today with a subset of the &lt;a href=&quot;/wiki/index.php/Ham_radio&quot; class=&quot;mw-redirect&quot; title=&quot;Ham radio&quot;&gt;ham radio&lt;/a&gt; com...&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;HELL (Hellschreiber) is a so called [[fuzzy mode]]. It was invented in the 1920s, and saw limited use until World War II. It has become popular today with a subset of the [[ham radio]] community. The message is transmitted as raw pixels, with the operator viewing the received image and mentally filtering out interference.&lt;/div&gt;</summary>
		<author><name>WikiSysop</name></author>	</entry>

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