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Alpha 250 kOhm linear

Description

Panel Mount Potentiometer

Sicherheitsinformation

Safety Information for Electrical Components, Especially for Tube Amplifiers

For all electrical, electromechanical, and mechanical components, the specifications and operating parameters defined by the respective type standards generally apply.
Further information, where available, can be found in the respective data sheets and product descriptions included with the product.

General Information

NOT SUITABLE FOR CHILDREN – choking hazard due to small parts
NOT SUITABLE FOR UNTRAINED PERSONS – danger to life due to high voltages
The safety and processing requirements applicable to the component must be observed
CE conformity applies only when installed professionally
Warranty becomes void in case of improper handling
The operator is responsible for proper installation
Local regulations and VDE provisions must be complied with
Never exceed the rated power
Never exceed the rated voltages and currents

Required Expertise

Use of measuring instruments (multimeter, oscilloscope) and evaluation of measurement results
Safe handling of high voltages (up to 500V and more)
Reading and understanding circuit diagrams
Selection of appropriate tools
Knowledge of electrical components and their characteristics
First-aid knowledge for electrical accidents
Knowledge of VDE regulations and safety requirements

Specific Safety Instructions by Component Groups

Amplifier Tubes

Hazard due to high voltages
Hazard due to very high heat generation
Hazard due to glass breakage
Hazard due to UV radiation in case of defective tubes

Transformers & Chokes
For qualified personnel only! Installation and removal of power transformers, chokes, output transformers, and switching power supplies may only be carried out by qualified specialists.

Hazard due to high voltages
Risk of electric shock
Hazard due to heavy weight
Risk of injury
Fire hazard in case of overload

Capacitors

Explosion hazard if electrolytic capacitors are connected with incorrect polarity
Never exceed the rated operating voltage
Hazard due to high voltages
Risk of electric shock
Capacitors can store voltage for hours

Resistors

Hazard due to high heat generation
Hazard due to high voltages
Fire hazard in case of overload
Hazard due to hot surfaces
Risk of burns

Fuses

Replace only with identical ratings
Never bypass or "repair" a fuse
Identify the cause of fuse failure before replacement
Fire hazard when using incorrect fuse ratings

Relays & Switches

Hazard due to switching sparks
Contact damage in case of overload
Fire hazard due to defective contacts

Potentiometers & Rotary Switches

Hazard due to high voltages at the contacts
Fire hazard in case of overload
Mechanical damage may lead to short circuits

Diodes & Rectifiers

Hazard due to high voltages
Heat generation
Risk of burns
Observe correct polarity
Malfunction in case of incorrect polarity
Heat sinks required for power diodes

Sockets, Connectors & Cables

Hazard due to high voltages
Check insulation for damage
Ensure proper strain relief
Fire hazard due to undersized cables
Touch protection required for high-voltage connectors

Heat Sinks & Fans

Risk of burns due to hot surfaces
Risk of mechanical injury from moving fans
Electrical hazard in case of defective fan motors

Circuit Boards & Turret/Lug Terminals

Hazard due to sharp edges
Fire hazard during soldering
Hazard due to solder fumes
Adequate ventilation required
Observe ESD protection

Housing Parts & Mounting Hardware

Risk of injury due to sharp edges
Electrical safety must be ensured
Observe proper grounding
Provide adequate ventilation openings
Ensure protection against contact with live parts

Measuring Instruments & Indicators

Hazard due to high voltages in analog instruments
Fragile glass front
Risk of injury

Documents

Alpha 24mm RV Series (637.95 KB)

Manufacturer

EU-Wirtschaftsakteur | EU Economic Operator
Tube-Town GmbH, Rumbergring 37, 66969 Lemberg, Germany, info@tube-town.de

Customer reviews

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This specialty potentiometer is commonly used in guitar and bass amplifiers. However, it is also suitable for use in electric guitars and basses. This product is designed with the features most widely requested by amplifier designers.

Mounting: Panel
Shaft Type: round, straight
Terminal: Solder Terminal
Power Rating:
- Log: 250 mW (1/4W)
- Lin: 500 mW (1/2 W)
Max. Operation Voltage:
- Log: 250 V
- Lin: 500 V
Standard Resistance Tolerance: 15%
Operating Temperature: - 10 C bis +70 C
Diameter Shaft: 6,35 mm
LengthShaft: 19 mm
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Thiele-Small Parameters

Resonant Frequency (Fs): 82.67 Hz
DC Resistance (Re): 7.83 Ohm
Coil Inductance (Le): 0.34 mH
Mechanical Q (Qms): 10.73
Electromagnetic Q (Qes):0.81
Total Q (Qts): 0.76
Compliance Equiv. Vol. (Vas): 24.13 cu ft
Mech. Compliance of Susp. (Cms):0.13 mm/N
BL Product (BL): 12.08 T-M
Diaphragm Mass Inc. Airload (Mms): 29.20 grams
Surface Area of Cone (Sd): 366.10 cm squared
Sound Pressure Level (spl): 99.03 db

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Custom Shop Faceplate PRO REVERSE - GLOSSY

Custom Shop Faceplate, Acryl Reverse, laser engraved
The engraved surface becomes transparent and must then be filled with paint. Just like the ProReverse but with a glossy surface. Looks very noble!

Material: 1,5 mm Acryl Reverse - GLOSSY
Working area: see option list
Colors: see option list
Engraving: Yes
Cutting: Yes
Resolution: max. 500 dpi
Machining: Laser

Important:

We will not produce faceplate which contain copyright-protected elements like logos or names !
Minimum size of an plate: 5 x 5 cm
Smaller objects should be connected to larger objects otherwise they can get lost. Example: connect the i-dot with the rest of the lettering for a cut-out lettering.
Minimum distance between two plates: 3 mm
Bitmaps and Inkscape: you should NOT use bitmaps, because this causes many problems: the PDF file could be corrupt or the quality of the finished product is bad etc.. Bitmaps should always be converted to vector graphics before they are used in the layout. There are numerous online converters which convert bitmaps (PNG, JPG etc.) to SVG. Use them, convert the Bitmap and avoid problems.

How does it work ?
First of all you should read the documents and infos on the

TT LaserShop Pages !

a) Select the required size, material and color combination

Hint: Several objects can be placed on a work surface, so cost-efficient material processing is possible. Example: two plates with a size of 55 x 490 mm (front and back plate) can be placed on a work space H2 with the overall size of 150 x 600 mm and can be ordered together. The configurations and optimizations have to be present in the submitted data.

b) Submit the order through the online shop.

c) Prepare the data according to our specifications. You can UPLOAD the finished data below on the page or sent it to us after completion of the order by e-mail (info at tube-town.de).

d) That's it. The rest is our job.

Note on the Parameter "Plates per Sheet"
The number of plates or logos per sheet. The more plates are on one sheet the longer the runtime is. We can make a maximum of 40 plates per sheet.

Note on "Logo-Option"
If your data contains large areas which need to be engraved (mostly seen on logos or plates for stomp-boxes) then you should check this option then we will engrave the plates twice to make sure that the quality is a as good as possible.
In principle, however, it should be avoided to use large, monochrome areas because one will always see small lines from the laser engraver.

!! IMPORTANT: WHEN CREATING THE PDF FILE, MAKE SURE TO CONVERT THE FONTS TO CURVES. !!
Overview of the requirements click here

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