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975: Difference between revisions
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Type ' | {{GR Product | ||
|model=975 | |||
|codes= | |||
|class=Resistance Standards | |||
|summary=Potentiometer Series | |||
|image=GR 975-J 500 ohms.jpg | |||
|caption=General Radio 975 Potentiometer Series | |||
|series=975 | |||
|introduced=1956 | |||
|discontinued=1973 | |||
|designers= | |||
|manuals= | |||
* [[Media:GR 970 Potentiometer Series Instruction Sheet 0970-0100-L 08_1965.pdf|General Radio 970 Series Instruction Sheet 0970-0100-L 1965]] | |||
{{Catalog History}} | |||
}} | |||
The {{Title|General Radio 975 Potentiometer Series}} was introduced in {{Catalog O}} and remained available through {{Catalog 1973}}. | |||
The Type 975 is part of the [[970]] Series of general purpose potentiometers. They are useful for dc, throughout the audio and ultrasonic-frequency ranges. They have the ability to be stacked while using a common ⅜ inch shaft. Stacking requires hardware that's not included. Mounting is by three 6-32 supplied screws. The basic power rating for the Type 975 is 10 watts. The 975 Series replaced the Type [[214-A]] Series of potentiometers. | |||
==Specifications== | ==Specifications== | ||
* '''Effective Electrical Rotation:''' 320° ±2° | |||
* '''Total Mechanical Rotation:''' 330° ± 5° | |||
* '''Average Torque:''' 4 oz/in. | |||
* '''Power Rating:''' panel mounted 13.4 w, suspended in air 10.7 w, see the power rating chart below | |||
{| class="wikitable" style="margin:auto" | |||
|+ Type 975 Series of Potentiometers | |||
|- | |||
! Type!! Resistance !! Temperature<br>Coefficient !!Resolution !! Independant<br>Linearity !!Code<BR>Word | |||
|- | |||
|#[[975-D]] || 10 Ω || +0.07% || <0.5% ||±1% || | |||
|- | |||
|#[[975-E]] || 20 Ω || +0.07% || <0.5% ||±1% || | |||
|- | |||
|#[[975-F]] || 50 Ω || ±0.002% || <0.5% ||±1% || | |||
|- | |||
|#[[975-G]] || 100 Ω || ±0.002% || <0.5% ||±1% || | |||
|- | |||
|#[[975-H]] || 200 Ω || ±0.002% || <0.5% ||±1% || | |||
|- | |||
|[[975-J]] || 500 Ω || ±0.002% || <0.2% ||±0.5% || EAGLEJUMP | |||
|- | |||
|[[975-K]] || 1000 Ω || ±0.002% || <0.2% ||±0.5% || EAGLEKISS | |||
|- | |||
|[[975-L]] || 2000 Ω || ±0.002% || <0.2% ||±0.5% || EAGLELEAP | |||
|- | |||
|[[975-M]] || 5000 Ω || ±0.002% || <0.2% ||±0.5% || EAGLEMILK | |||
|- | |||
|[[975-N]] || 10 kΩ || ±0.002% || <0.1% ||±0.5% || EAGLENULL | |||
|- | |||
|[[975-P]] || 20 kΩ || ±0.002% || <0.1% ||±0.5% || EAGLEPARK | |||
|- | |||
|[[975-Q]] || 50 KΩ || +0.002% || <0.05% ||±0.5% || EAGLEQUAD | |||
|- | |||
|[[975-R]] || 100 KΩ || +0.002% || <0.05% ||±0.5% || EAGLERISK | |||
|- | |||
|} | |||
* '''# Available by request''' | |||
==Links== | ==Links== | ||
* [[Media:GR Exp 970 Series 01_1955.pdf|Experimenter January 1955 describing | * [[Media:GR Exp 970 Series 01_1955.pdf|Experimenter January 1955 describing Type 970 Series]] | ||
==Photos== | ==Photos== | ||
<gallery> | <gallery> | ||
GR 975-J 500 ohms.jpg | |||
GR 975 Top.jpg | |||
GR 975 Front.jpg | |||
GR 975 Open.jpg | |||
GR 975 Mechanical Drawing.jpg|Mechanical Drawing | |||
GR 975 Power Rating Chart.jpg|Power Rating Chart | |||
</gallery> | </gallery> | ||
[[Category:Resistance Standards]] | [[Category:Resistance Standards]] | ||