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310: Difference between revisions
specs
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It is a 4 MHz single-trace, single-timebase scope with a 3" (7.5 cm) round CRT. | It is a 4 MHz single-trace, single-timebase scope with a 3" (7.5 cm) round CRT. | ||
{{BeginSpecs}} | |||
{{Spec | Bandwidth | 4 MHz (3.5 MHz below 0.1 V/Div, AC coupled) }} | |||
{{Spec | Rise time | 90 ns (100 ns below 0.1 V/Div, AC coupled) }} | |||
{{Spec | sweep | 0.5 μs/Div to 0.2 s/Div 1-2-5 sequence}} | |||
{{Spec | Deflection | 10 mV/Div to 50 V/Div, 1-2-5 sequence (below 0.1 V/Div only AC coupled) }} | |||
{{Spec | Input impedance | 1 MΩ // 40 pF }} | |||
{{Spec | X input | 1.5 V/Div, 500 kHz, 100 kΩ }} | |||
{{Spec | Z input | 20 V<sub>p-p</sub> at rear "CRT Cathode" binding post }} | |||
{{Spec | Calibrator | 0.5 V<sub>p-p</sub> to 100 V<sub>p-p</sub>, 1-2-5 sequence; 1 kHz }} | |||
{{Spec | Power | 175 W }} | |||
{{EndSpecs}} | |||
== Cooling == | ==Internals== | ||
=== Cooling === | |||
The 310 is a tube scope and uses 175 watts, but it does not have a fan. Therefore, it tends to run hot, particularly when used in a hot environment with still air. It has a 165 °F (74 °C) [[thermal cutoff]] switch in series with the primary of the power transformer. For extended use in one place, a tilted fan base, the FB310 (part number 016-012) was available. The fan base blows air upward through the perforated bottom panel of the 310. | The 310 is a tube scope and uses 175 watts, but it does not have a fan. Therefore, it tends to run hot, particularly when used in a hot environment with still air. It has a 165 °F (74 °C) [[thermal cutoff]] switch in series with the primary of the power transformer. For extended use in one place, a tilted fan base, the FB310 (part number 016-012) was available. The fan base blows air upward through the perforated bottom panel of the 310. | ||
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they switched to a Tek-made CRT, part number [[154-366]], which is compatible with the [[3WP2]]. | they switched to a Tek-made CRT, part number [[154-366]], which is compatible with the [[3WP2]]. | ||
Unlike later Tek instruments, where the incremental model designated by an “A” suffix only occurred with a significant specification or performance enhancement, the original 310 and 310A were essentially identical. | Unlike later Tek instruments, where the incremental model designated by an “A” suffix only occurred with a significant specification or performance enhancement, the original 310 and 310A were essentially identical. They even shared the same manual and schematics. The main difference was the wiring construction. | ||
They even shared the same manual and schematics. The main difference was the wiring construction. | |||
The original 310 pioneered the use of circuit board construction, rather than the trusted ceramic strip point to point wiring. The circuit boards were two sided, however plated through hole technology to interconnect the layers had not been invented yet. Rather, all of the holes for component mounting and interconnect contained a rivet | The original 310 pioneered the use of circuit board construction, rather than the trusted ceramic strip point to point wiring. The circuit boards were two sided, however plated through hole technology to interconnect the layers had not been invented yet. Rather, all of the holes for component mounting and interconnect contained a rivet | ||
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Fun off | Fun off | ||
==Links== | |||
* [http://richardsears.wordpress.com/2011/11/18/tektronix-310a/ Richard Sears: Tektronix 310 and 310A] | |||
==Pictures== | |||
<gallery> | <gallery> | ||
File:Tek_310A.jpg|310A Front view | File:Tek_310A.jpg|310A Front view | ||