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summary=4 MHz oscilloscope| | summary=4 MHz oscilloscope| | ||
manuals= | manuals= | ||
* [http://w140.com/tek_310_early.pdf Tektronix 310 Manual ( | * [[Media:IM-310-2.pdf|Tektronix 310 Manual (early, PDF)]] [http://w140.com/tek_310_early.pdf alternate] | ||
* [http://w140.com/tek_310a.pdf | * [[Media:070-0892-00.pdf|Tektronix 310 Manual (rough, PDF, OCR, bad-OCR)]] / [http://w140.com/tek_310_rough.pdf alternate] | ||
* [[Media:070-0893-00.pdf|Tektronix 310A Manual (PDF, OCR, bad-OCR)]] / [http://w140.com/tek_310a.pdf alternate (PDF)] / [http://w140.com/tek_310a.djvu alternate (DjVu)] | |||
* [http:// | * [http://bama.edebris.com/manuals/tek/310a/ Tek 310A manuals @ BAMA] | ||
<small> | |||
===Calibration Procedures=== | |||
* | * [[Media:tek_310_fcp.pdf|Tektronix 310 Factory Calibration Procedure (PDF, OCR, bad-OCR)]] / [http://w140.com/tek_fcp/tek_type_310_factory_cal_proc.pdf alternate] | ||
* [[Media:tek_310a_fcp.pdf|Tektronix 310A Factory Calibration Procedure (PDF, OCR, bad-OCR)]] / [http://w140.com/tek_fcp/tek_type_310a_factory_cal_proc.pdf alternate] | |||
* [[Media:Tek 310a fcp oct 1968 with 1969 updates.pdf|Tektronix 310A Factory Calibration Procedure with 1969 updates]] | |||
</small> | |||
<small> | |||
===Modifications=== | |||
* [[Media:Tek 310a mod 109a.pdf|Tektronix 310A Mod 109A, High-Altitude Modification (PDF)]] | |||
* [[Media:Tek 310a mod 812s.pdf|Tektronix 310A Mod 812S, Vertical Input Connector Changed to UHF]] | |||
* [[Media:Tek 310a mod 222a.pdf|Boeing Black-out]] | |||
* [[Media:Tek 310a mod 815e.pdf|Tektronix 310A Mod 812S, Trigger and Calibrator Connectors Changed to BNC]] | |||
* [[Media:Tek 310a mod 812z.pdf|Tektronix 310A Mod 812S, Input, Trigger, and Calibrator Connectors Changed to UHF]] | |||
* [[Media:Tek 310 silicon rectifier mod.pdf|Tektronix 310 Silicon Rectifier Mod]] | |||
* [[Media:Tek 310a mod 119F.pdf|Tektronix 310A Mod 119F]] | |||
* [[Media:Tek 310a mod 120H.pdf|Tektronix 310A Mod 120H]] | |||
</small> | |||
}} | }} | ||
The '''Tektronix 310''' is a compact portable oscilloscope [[introduced in 1955]]. | The '''Tektronix 310''' is a compact portable oscilloscope [[introduced in 1955]]. | ||
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. | ||
The [[Hickok]] company produced a clone of the 310 under a US military contract as the [[AN/USM89B]]. | |||
== Cooling == | {{BeginSpecs}} | ||
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. | {{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}} | |||
==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 hinged at the rear, allowing reasonably convenient access to the circuitry despite the fact that the components are packed more densely than in other Tektronix scopes of the era. | The 310 is hinged at the rear, allowing reasonably convenient access to the circuitry despite the fact that the components are packed more densely than in other Tektronix scopes of the era. | ||
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<gallery> | <gallery> | ||
Tek 310 on base.jpg|310 on fan base | |||
Tek_310a_cl.jpg | |||
Wellenkino 310a.jpg|310A | |||
Tektronix-310a.jpg | 310A | |||
Tek 310 rear.jpg|310 | |||
Tek 310 front.jpg|310 | |||
</gallery> | </gallery> | ||
This is a nearly true pure vacuum-tube scope, but in the power supply there are some silicon rectifiers | This is a nearly true pure vacuum-tube scope, but in the power supply there are some silicon rectifiers | ||
and in the circuit is one germanium point contact diode. | and in the circuit is one germanium point contact diode. | ||
It is sometimes very useful because it contains a | It is sometimes very useful because it contains a 1 kHz calibrator output with up to 100V level combined with a step attenuator. | ||
Early examples of the Tektronix Type 310A used commodity 3WPx CRTs. At some point in production, | Early examples of the Tektronix Type 310A used commodity 3WPx CRTs. At some point in production, | ||
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 | ||
which was expanded in a press before the components were installed in the board. The rivets themselves were not soldered to the copper foil traces, and relied on the pressure from the crimp to make contact. This proved to be extremely unreliable, with many intermittent connections resulting in high warranty and after warranty failure. | which was expanded in a press before the components were installed in the board. The rivets themselves were not soldered to the copper foil traces, and relied on the pressure from the crimp to make contact. This proved to be extremely unreliable, with many intermittent connections resulting in high warranty- and after-warranty failure. | ||
The 310A model essentially used the identical circuit design, but returned to the trusted ceramic strip construction method. | The 310A model essentially used the identical circuit design, but returned to the trusted ceramic strip construction method. | ||
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The scope cabinet was hinged to allow it to be opened like a book and operated for access to the circuitry for service purposes. The 310 and 310A were convection cooled, and required free access to air through the cabinet vent holes to avoid overheating. It contained a thermal cut-out to protect it from damage if the supply of cooling air was inadequate. The scope has feet on the rear panel to allow it to be operated on the floor with the front panel facing up, but the manual warns against prolonged operation in this orientation. Shortly after introduction, Tek offered a Fan Base accessory, which the scope would sit on and provide forced air for better cooling. While the scope had universal primary wiring options, the fan base did not. Separate models were available for 115 VAC or 230 VAC operation. | The scope cabinet was hinged to allow it to be opened like a book and operated for access to the circuitry for service purposes. The 310 and 310A were convection cooled, and required free access to air through the cabinet vent holes to avoid overheating. It contained a thermal cut-out to protect it from damage if the supply of cooling air was inadequate. The scope has feet on the rear panel to allow it to be operated on the floor with the front panel facing up, but the manual warns against prolonged operation in this orientation. Shortly after introduction, Tek offered a Fan Base accessory, which the scope would sit on and provide forced air for better cooling. While the scope had universal primary wiring options, the fan base did not. Separate models were available for 115 VAC or 230 VAC operation. | ||
Like most old Tektronix devices the mains transformer holds | Like most old Tektronix devices the mains transformer holds an indefinite(!) warranty, so hold an eye to that. The device goes away on ebay here often for 30€ to 60€. | ||
Fun on | Fun on | ||
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Fun off | Fun off | ||
==Links== | |||
* [http://richardsears.wordpress.com/2011/11/18/tektronix-310a/ Richard Sears: Tektronix 310 and 310A] | |||
* A Tek 310 restoration @ YouTube: [https://www.youtube.com/watch?v=Ef-6Vfx1oiY Part 1] / [https://www.youtube.com/watch?v=6HG49aX_TlM Part 2] | |||
==Pictures== | |||
<gallery> | <gallery> | ||
Tek_310A.jpg|310A Front view | |||
310A_right.jpg|310A Right internal | |||
310A_foldoff.jpg|310A Folded off internal | |||
310A_left.jpg|310A Left internal | |||
310A_top.jpg|310A Top internal | |||
310A_bottom.jpg|310A Bottom special slot to access sweep trigger tubes | |||
Tek_310A_Underside2.jpg | 310A Bottom special slot to access sweep trigger tubes | |||
310A_back.jpg|310A Rear view | |||
warranty.jpg|310A indefinite warranty to the Tektronix manufactured transformer | |||
310 1.jpg|310 right front | |||
310 2.jpg|310 front | |||
310 3.jpg|310 rear | |||
310 4.jpg|310 model | |||
310 5.jpg|310 right rear | |||
Tek 310 base.jpg|fan base in '57 catalog | |||
Tek 310a left internal.jpg|310A Left Internal | |||
Tek 310a right internal.jpg|310A Right Internal | |||
Tek 310 ibm prop.jpg|310 made for IBM | |||
Tek 310 top inside.jpg|310 top inside | |||
Tek 310 left inside.jpg|310 left inside | |||
Tek 310 right internal.jpg|310 right internal | |||
Tek 310 rear.jpg|310 rear | |||
Tek 310 bottom.jpg|310 bottom | |||
Tek 310 right external.jpg|310 right external | |||
Tek 310 left external.jpg|310 left external | |||
Tek 310a top clean.jpg|310A top | |||
Tek 310a rear2.jpg|310A rear | |||
Tek 310a right internal2.jpg|310A right internal | |||
ANUSM89B_1.jpeg|Frontview AN/USM89B from Hickok | |||
ANUSM89B_2.jpeg| Sideview AN/USM89B from Hickok | |||
ANUSM89B_3.jpeg| type-plate of AN/USM89B from Hickok | |||
Tek ncr 310a case.jpg|Case for 310A | |||
Tek 310a in ncr case.jpg|310A in case | |||
Tek 310a with case.jpg|Tek 310A with case | |||
Tek 310a carrybag left.jpg|Carrying bag for 310, left | |||
Tek 310a carrybag top.jpg|Carrying bag for 310, top | |||
Tek 310a carrybag exposed.jpg|310A inside carrying bag, exposed cushion | |||
</gallery> | </gallery> | ||
[[Category:Monolithic tube scopes]] | [[Category:Monolithic tube scopes]] | ||