519: Difference between revisions

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2 bytes added ,  9 March 2017
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modified instruments."
modified instruments."
</blockquote>
</blockquote>
The following paper includes a chart that mentions in Figure 10 the 3GHz 519C [[introduced in 1963]].   
The following paper includes a chart that mentions in Figure 10 the 3 GHz 519C [[introduced in 1963]].   
The 519C is either very rare or extinct or was never actually made.
The 519C is either very rare or extinct or was never actually made.


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