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1401: Difference between revisions
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There appear to be two variants of the 1401A, both the manual and | There appear to be two variants of the 1401A, both the manual and | ||
catalog specify the resolution bandwidth selector as 1000, 100 and 3 KHz, | catalog specify the resolution bandwidth selector as 1000, 100 and 3 KHz, | ||
but the later versions are 100, 100, and 10 KHz. | but the later versions are 100, 100, and 10 KHz. There is also a 1401A-1 | ||
which has a 75 ohm input impedance. | |||
The 1401A is designed to be used with an oscilloscope with 10 horizontal | The 1401A is designed to be used with an oscilloscope with 10 horizontal | ||
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See TekScope January 1972 pages 14-15 for some servicing notes that | See TekScope January 1972 pages 14-15 for some servicing notes that | ||
Tek wrote after the manual was published. | Tek wrote after the manual was published. [http://w140.com/tekwiki/images/d/d6/Tek1401a-tekscopes.pdf Service Note] | ||
There is one tunnel diode found in the external trigger circuit. | There is one tunnel diode found in the external trigger circuit. | ||