KLD amp kit building primer

If you are not familiar with the basics of electronics, please take some time to learn below about electronic components used in tube guitar amp and what are several parts consisted one amp.
Transformer
Any amp must has a power transformer, which change wall voltage into the voltage used in amp. There are two coils in a transformer : "primary coil" and a "secondary coil" , two coils are winded on the core of transformer, to ensure efficient magnetic coupling between the windings, facilitating the transfer of electrical energy from the primary side to the secondary side.
Power transformer primary and secondary coils are generally as follows:
Primary coil:Primary coil:connect with the wall power. Primaries coil has multi input ports that can take different wall voltages like 110V/120V,230V/240V, in order to make sure the amp can be used in different countries.
Secondary coil: 260ACV high voltage pass through the bridge rectifier to supply DC voltage to the plate of tubes; 25 ACV also pass through half bridge rectifier to supply the bias voltage of two 6L6 tubes.There are two ports of 6.3VAC(6.3V-0-6.3V) supply voltage to the filaments of tubes: To the big power amps , such as JCM 25 or Bassman 25 , you can be used one 6.3VAC port supplying the filaments of tubes of preamp(6.3VAC-0V), and other 6.3VAC port for the filament of power tubes; To the small power amps such as PVA18,or UT18, you can be used one port supplying the filament of all tubes.

Power transformer 110V Power transformer

Output transformer primary and secondary coils are as follows:
Because the vacuum tube is voltage amplifier, so it need one output transformer to drive speaker.
Tips: REMEMBER: DO NOT OPERATE YOUR AMP WITHOUT A LOAD.CONFIRM LOAD CONNECTED, BEFORE YOU TURN ON AMP.

Primary coil:There are 3 input terminals in primary coil of OPT( There are two terminals in Class A amp). connect with the two plates of Class AB power amp tubes( There is one terminal in Class A amp). Center terminal of primary coil of OPT ( CT) connect with B+.
Secondary coil:This is the speaker output section.The number of terminals of secondary coil of OPT is dependent on the number of different impedance speakers which amp can connect , commonly are 4Ohm, 8Ohm,16Ohm, which is matched with the speaker.
Output transformer 6L6 x2
The constitution sections of amp
Rectifier:
This can be solid state or vacuum tube.Either way, this takes high AC voltage and turns it into DC voltage. Tube rectifiers will need the 5v or 6v filament winding on the power transformer.
Power supply:
This is important! Each amp has a power supply , which supplies power to different parts of the amp. It involves the power transformer, filter caps, rectifier and other components, depending on the amp. What the voltage is depends on the type of amp it is. Is it a cathode bias or fixed bias amp? Does it have 2,3, or 4 stages of filtering? Does it have a reverb driver? Etc. You'll need to know this information for ease of troubleshooting and keeping yourself safe.
Preamp section:
This is where your signal is amplified and sent to the various stages for amplification as well as modifying the tone via various potentiometers.
Phase Inverter:
Some amps have them and some don’t. There are also different types of phase inverter circuits. It may be best to research phase inverters separately as this is a topic that encompasses a ton of information.
Output section:
This is what does the heavy lifting for the amp. It takes the preamp signal and boosts it via the output transformer, tube plates, negative feedback loop, etc.
Bias circuits:
This is what regulates the idle of the output tubes so the amp can run efficiently. This voltage is negative on fixed-bias amps. There are fixed-bias amps, cathode-biased amps and fixed-bias amps with a bias balance. Know what all three are and note the differences.
Basic of vacuum tube
Preamp vacuum tube:
These are most commonly 9 pin (noval) tubes that can have 2 triodes in the same glass envelope. Examples are 12AY7, 12AT7, 12AX7, 7025, 5751, etc.
Output or power vacuum tube:
These are larger than preamp tubes and have various methods of operation. They are commonly 8 pin (octal) pentodes, power beam tubes, and tetrodes. These are limited to one amplification circuit per tube. Examples are 6V6, 6L6, EL34, EL84, KT88's etc.
Tube anatomy:
Tubes can be called a diode, a triode, a pentode, or a tetrode, depending on the construction of the tube itself. Even though they may have the same base that fits your socket, this doesn't mean it will work. All tubes will have a cathode and a plate. This makes up a diode. When you add components like a control grid, screen and suppressor, the tube type changes.
Filament wiring:
This is usually to Pins 2 and 7 on the octals and Pins 4+5 and 9(common pin)on Noval sockets and 2 and 8 on common rectifiers.
Other components used in amp
Potentiometers:
These have many different values and do various things. Think of them as variable resistors. Tone and volume controls are usually pots. Bias supplies also have these, but they are not the same as regular signal/tone pots.
Capacitors:
These also have different value and voltage ratings in addition to different types of construction. These include polyester film , and electrolytic polarized, ceramic disk, film and foil and Mica type caps. These tend to look very different by design. A polarized cap means it needs to go into the circuit in a particular orientation, usually denoted by a'+' or a '-'on the side of the cap in most cases.Detail about capacitor, please watch Capacitors used in tube guitar amp
Resistors:
Like capacitors, resistors have different values, types, and voltage ratings. From material consisted, resistors can be divided into carbon comp, metal oxide, metal film, and carbon film serval types. Carbon comps usually look different than carbon film and metal film. Also, generally speaking, the larger the resistor, the greater the power it can tolerate. Common values in tube amps are 220k, 1Meg, 68K, 100K etc. These can be anywhere from 1/2w to 10w, depending on the application. Carbon comps are generally used in Fender amps and Carbon film are used in British style amps historically.