Long Precision Side Cutter - 125 mm

TT PI18 - An All-Tube 18 Watt Guitar Amp Kit, based on the Pink Taco.
Version 2020, Turretboard Version 2020, with the following additions and extensions compared to the previous version:

• The kit contains components for two different tone controls: Tight (British Voicing) and FAT (Original Voicing).
• Optimizations in the area of master potentiometers and the circuit design of the first gain stage
• Optimizations of the boost function
• Noise-Reduction for Higain & Hum Suppression
• Easier to build then the previos kit

Set of componentes for building the TT PI18 Guitar Amp.
Please visit the >>Project page for more infos about the amp.
We will send the circuit and layout plan of the kit together with the invoice by email after the delivery.

INCLUDED:

• Outputtransformer Tube-Town tt-ma18-ot
• Powertransformer Tube-Town 18W, 0-120-230-240V @ 50/60 Hz (since 25. Oct. 2019)
• FX-Loop
• Resistors
• Capacitors
• Jacks
• Light
• Wires
• Board
• Switches
• Tubes
• Fuses & Fuesholder

NOT INCLUDED:

• Chassis
• Turrets ( you need 4 x 25 pcs. )
• Knobs
• Faceplate
• Headshell

To build this project knowledge in electric engeneering, experience with high voltage, and the reading and understanding of schematics and dealing with measurement device is highly recommended .
There is NO step-by-step guide for beginners. The circuit and layout plan includes all relevant information. If you don't understand it then don't build it.
THIS IS NOT A BEGINNERS PROJECT !

Files:

• Application Notes Turret-PCB

TT-Chassis Aluminium - Typ 040

Chassis for the PX18/PI18 kit, fits in all of our Standard Smallhead and 18W Headcabs and Combos

• Size : 430 x 170 x 65 mm
• Material: 2 mm Aluminium
• Made in Germany
• fits Alpha 3/8" Potentiometer (Intemnumber p38-*)
• Mounting: with cage nuts (not included)

Files:

• Datasheet

• Turrets
• for 2 mm Boards
• nickel-plated
• pack of 100 pcs

• Turrets
• for 3 mm Boards
• nickel-plated

• Rubber foot with steel insert
• Size: d = 38 mm, h = 25 mm
• Pack of 4

Case Handle imitation leather, Dog-Bone Style

• Mounting fittings: Steel, nickel plated
• Color: Black
• WITHOUT NUTS AND SCREWS

Cabinet corner leather black, Set of 4
100 % real letaher, vegetable tanned
Caution: natural product ! The texture and thickness may vary.

Hint: put the corners into water for a few minuties before mounting. This makes them soft and elastic and than they will fit better.
The corners on the chassis should be well rounded too in order to achieve best results.

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