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	<id>https://wiki.naturalphilosophy.org/index.php?action=history&amp;feed=atom&amp;title=Ekhard_Preikschat</id>
	<title>Ekhard Preikschat - Revision history</title>
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	<updated>2026-07-18T06:34:12Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://wiki.naturalphilosophy.org/index.php?title=Ekhard_Preikschat&amp;diff=289541&amp;oldid=prev</id>
		<title>ClaudeBot: Add to Category:Worldwide List of Dissident Scientists (listed in the de Climont directory)</title>
		<link rel="alternate" type="text/html" href="https://wiki.naturalphilosophy.org/index.php?title=Ekhard_Preikschat&amp;diff=289541&amp;oldid=prev"/>
		<updated>2026-07-17T19:19:27Z</updated>

		<summary type="html">&lt;p&gt;Add to Category:Worldwide List of Dissident Scientists (listed in the de Climont directory)&lt;/p&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 15:19, 17 July 2026&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l28&quot;&gt;Line 28:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 28:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Scientist|Preikschat Ekhard]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Scientist|Preikschat Ekhard]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Category:Worldwide List of Dissident Scientists]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
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		<author><name>ClaudeBot</name></author>
	</entry>
	<entry>
		<id>https://wiki.naturalphilosophy.org/index.php?title=Ekhard_Preikschat&amp;diff=14018&amp;oldid=prev</id>
		<title>Maintenance script: Imported from text file</title>
		<link rel="alternate" type="text/html" href="https://wiki.naturalphilosophy.org/index.php?title=Ekhard_Preikschat&amp;diff=14018&amp;oldid=prev"/>
		<updated>2016-12-30T19:39:17Z</updated>

		<summary type="html">&lt;p&gt;Imported from text file&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 15:39, 30 December 2016&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l27&quot;&gt;Line 27:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 27:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* 1968 - &amp;quot;[[Moessbauer Effect and Tests of Relativity]]&amp;quot;  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* 1968 - &amp;quot;[[Moessbauer Effect and Tests of Relativity]]&amp;quot;  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
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&lt;/table&gt;</summary>
		<author><name>Maintenance script</name></author>
	</entry>
	<entry>
		<id>https://wiki.naturalphilosophy.org/index.php?title=Ekhard_Preikschat&amp;diff=8733&amp;oldid=prev</id>
		<title>Maintenance script: Imported from text file</title>
		<link rel="alternate" type="text/html" href="https://wiki.naturalphilosophy.org/index.php?title=Ekhard_Preikschat&amp;diff=8733&amp;oldid=prev"/>
		<updated>2016-12-30T17:12:44Z</updated>

		<summary type="html">&lt;p&gt;Imported from text file&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;{{Infobox scientist&lt;br /&gt;
| name = Ekhard Preikschat&lt;br /&gt;
| image = Ekhard Preikschat 1189.jpg&lt;br /&gt;
| alt = Ekhard Preikschat&lt;br /&gt;
| residence = Bellevue, WA, United States&lt;br /&gt;
| nationality = USA&lt;br /&gt;
| known_for = [[Relativity]]&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
Son of scientist, inventor&amp;amp;nbsp;[../php2/index.php?tab0=Scientists&amp;amp;amp;tab1=Display&amp;amp;amp;id=1188 Fritz K. Preikschat], Ekhard Preikschat performed the most accurate ?aether drift test? ever conducted as his PhD thesis in 1968 at the Univ. of Birmingham, UK, under the direction of Prof. George Isaak. Involving Moessbauer gamma rays, the test directly measured the one way speed of light at all azimuthal angles. Inspired by Wallace Kantor?s claims to have measured effects validating emission theory, in 1986 Preikschat and his father set out to test emission theory using a high speed (corner cube) mirror in a high vacuum (to eliminate extinction effects as predicted by Ewald-Oseen?s extinction theorem). The 1986 test was inconclusive because the rotor was not stable enough to allow longer term measurements, however Preikschat still intends to see the experiment performed with enough precision to obtain definitive results.&lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;Articles:&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
&lt;br /&gt;
* [http://www.lightspeedtest.com/images/Dc43.JPG Historical Test Results] (Fig 6.22 in thesis)&lt;br /&gt;
* [http://www.lightspeedtest.com/images/Figure%206.18.JPG Overall Results] (Figure 6.18 in thesis)&lt;br /&gt;
* [http://www.lightspeedtest.com/LightSpeed.pdf Complete Ph.D. Thesis] (6 MB .PDF File)&lt;br /&gt;
* [http://www.lightspeedtest.com/images/Plate%205.1.JPG Test Apparatus] (Plate 5.1 in thesis)&lt;br /&gt;
* High Speed Rotor with Source and Absorber (Plate 5.3 in thesis)&lt;br /&gt;
* [http://www.lightspeedtest.com/George%20Isaak.pdf George R. Isaak] (1933-2005)&lt;br /&gt;
&lt;br /&gt;
==Abstracts==&lt;br /&gt;
&lt;br /&gt;
* 2010 - &amp;quot;[[Crucial Tests of Special Relativity]]&amp;quot; ([http://www.naturalphilosophy.org/pdf/abstracts/abstracts_5304.pdf Read in full])&lt;br /&gt;
&lt;br /&gt;
==Books==&lt;br /&gt;
&lt;br /&gt;
* 1968 - &amp;quot;[[Moessbauer Effect and Tests of Relativity]]&amp;quot; &lt;br /&gt;
&lt;br /&gt;
[[Category:Scientist]]&lt;/div&gt;</summary>
		<author><name>Maintenance script</name></author>
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