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Alpha 250 kOhm log

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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Recommended products:

Alpha 250k Ohm log / Audio - Pack of 5

Panel Mount Potentiometer - Pack of 5

Power Rating: 0,25 W
Voltage Rating: 250 V AC
Tolerance: 20%
Shaft: 6,35 mm, Solid Shaft
Shaft length: 15 mm
Drill Ø: M8 (7,8 mm)
Termination: Solder lugs
Dimension: 24 mm

4,90 €
0,98 € per Piece

Customers who bought this product bought also the following products:

Kit TT PoS100 - A 100 Watt Power Attenuator

TT PoS100

Power: 100 W RMS
Damping: 0 - 100%
Impedance: 4, 8, 16 Ohm
Line-Out

Please note in advance: The PoS is a resistive attenuator, which is used for power reduction and is connected between amplifier output and loudspeaker cabinet. It is NOT a reactive load. For this purpose the Tone-Hound must be used.

The schematic and layout plan for this kit will be sent by email together with the invoice, usually on the same day the order is sent.

The PoS100 attenuator is the steady further development of the PoS50 and provides a simple construction and simple handling together with a high power rating. The Pos100 can be used with a load of 4, 8 or 16 ohm and has a maximum power rating of 100 W.
Another addition is the available Line-Out which can be used to directly process the output signal.
The attenuator gets build in a compact chassis of 2 mm aluminium plates.
This kit comes with all items needed to build the PoS100, aluminium chassis, black faceplates, knobs, screws and schematic and layout.

The new version offers the following additional options:

Selection of the adjustment range (Range): this effects the resolution of the load potentiometer. High initial damping allows easier fine tuning of the final volume. With a lower basic attenuation the adjustment range is wider and covers a larger volume spectrum
Selection of the control behaviour (Log/Lin): depending on the amplifier, the control behaviour of the load potentiometer can be adapted

A customer has made a recording with his Marshall and PoS100 and has put it online. You can see the video on YouTube.

FAQ: Can I use the PoS100 as dummy-load ?

Yes, but you must connect a "load" to the PoS100. This must NOT be a speaker-cab ! Just use a power resistor with 8 Ohm, mount it onto a heat sink and connect it with a jack than you can use the PoS as a Dummy-Load too.

Files:

Datasheet (EN)

125,00 €