Sovtek 5881WXT - PAIR

• Type: Footswitch
• Version: DPDT Latching ON - ON
• Rating: 3A / 250VAC
•   6A / 125VAC
• Termination Style: solder-lugs

Files:

• Datasheet

Universal Fender-style power transformer, suitable for Champ, Vibro Champ, Princeton, Princeton Reverb, Tweed Deluxe and similar amplifiers, depending on the circuit design.

• Primary: Dual voltage, 120 V or 240 V, 50/60 Hz
• Secondary: 630 VAC or 550 VAC
• Heater windings: 6.3 V @ 2 A and 5 V @ 2 A

• Springs: 3
• Delay Type: medium
• Size: short (9 ¼" / 23,5 cm)
• Input Impedance: 800 Ohms
• Output Impedance: 2575 Ohms
• Mounting: Horizontal Open Side Down
• Connectors: Input Insulated - Output Grounded
• Accutronics by Accu-Bell, Made in Korea

Suitable for these amplifiers Fender® Blues Jr., Deluxe 90, Princeton 65, Stage Series, Acoustasonic Junior, Vaporizer, Ultimate Chorus, Ultra Chorus, Sidekick Keyboard 60, Sidekick Reverb 35, Super 60, Super 112, Frontman 65R, Eighty-Five, Tech 21® Trademark 30, Epiphone® Valve Junior Hot Rod, Vox® AC15CC, AC15C, Peavey® Envoy 110, Ultra 60/120, Backstage, Valveking and similar models.


 

4 tubes, matched as quad

Extremely consistent and reliable work-horse power beam tetrode. Built to rigid military standards, the 5881WXT will tolerate higher voltages than most other 6L6 types. Frequently used as replacement for old 7027s in vintage Ampegs. 
Compared to the 5881WGC, the Sovtek 5881WXT has a taller tube base.

Kit of a bias probe for indirect measurement of the quiescent bias current of a tube. The adapter is placed between the tube and the socket and is connected to a standard voltmeter (not included). Pay attention to the quality of the meter and to sufficiently charged batteries!

The quiescent current is measured indirectly via a precision resistor built into the adapter. The advantages of this measuring method are harmless voltages in the mV range at the measuring plugs as well as short ways for the current, since it does not have to be led through the measuring device (common practice with many measuring adapters of Far Eastern production). As a result, there is no risk of oscillation of the amplifier, which could damage the tubes or the amplifier itself.

Note: This adapter cannot be used when additional tube brackets are installed. These must be removed before using the measurement adapter and reattached after the measurement is complete.

Measurement procedure
Determine the resistance of the adapter, including the test leads. Connect the adapter to the meter, but do not connect it between the tubes and the amplifier. Select the ohms range on the meter and note the reading, e.g. 1.1 ohms.
For the final measurement, insert the adapter between the tube and the de-energized amplifier, connect it to the meter, select the mV range and switch on the amplifier. When the amplifier has reached a stable operating condition, read the value in mV from the meter and calculate the quiescent current using Ohm's law.

Example
Measured voltage = 47 mV, adapter resistance = 1.1 ohms.
Formula (I = V / R) or in this case
Bias Current (in A) = Measured Value (Voltage in V) / Measured Value (Resistance in Ohm)
0.047V / 1.1 Ohm = 0.042A or 42mA

For the calculation of the correct bias current as well as further information on bias measurement please refer to further documents or the bias setting instructions in the info section as well as the manual of the amplifier itself.
This adapter is suitable for all EL34, 6L6, 6550, KT88, 6V6, 6CA7 and other tubes with the same pinout.

Attention HIGH VOLTAGE ! Measurements and work on tube amplifiers should only be done by qualified personnel.

Files:

• Datasheet

Type: Noval Socket Belton VT9-ST-2

• Version: High quality Micalex socket
• Chassis mount
• Termination Style: solder lugs
• for Tube Type: 12AX7, 12AT7, 12AU7, EL84, EZ81, EL844 etc.