- cathode-bypass caps, rated at 25-100V.
- Axial, with leads long enough to stretch across a 76.5mm-wide turret board.
- values from 1uF to 470uF
- high-voltage capacitors for power supply filtering
- 10uF; 22uF; 33uF; 47uF and 100uF.
from 1nF to 1uF, various voltage ratings
Mallory caps are axial, with leads plenty long enough to stretch across 76.5mm-wide turret boards.
715P series polypropylene film caps, from 1nF to 100nF, popular for Fender-style builds
use in the signal path.
It’s radial (as opposed to the axial Mallory 150 type),
Smaller than the radial Orange Drop caps. Rated at 630V DC.
Silver mica capacitors
Compact capacitors, from 10pF to 1000pF, 500V rating
Silver mica caps are radial, with two leads – each approximately 33mm long – coming out of the underside of the cap
Sozo polyester film capacitors
The first of the famous “mustard cap” clones – new, old st
Values range from polyester film caps from 1nF-100nF in 400V and
0.68uF in 160V for Marshall preamp cathodes.
These caps are axial, with leads plenty long enough to stretch across 76.5mm-wide turret boards.
https://www.ampmaker.com/shop/orange-drop-capacitors-2/
MPP stands for Metallized Polypropylene Capacitor.
Dielectric in these capacitors is thin polypropylene film metallized with fine layer of Zinc, Zinc Alloy or Aluminium.
The layer is so thin that in the event of dielectric breakdown at a weak spot in service, the metal around the spot evaporates and gets isolated. Capacitor continues to work normally thereafter. This increases life of the capacitor.
Ceramic Capacitor Code
-------------------------
3 Digit Code => Value
# # # # # x 10^# pf
Example 1
---------
104 1 0 x10^4 pf
=10x10000 =100000 pf or 100nf or .1uf
Example 2
---------
155K = 15 x 10^5 pf = 1500nf or 1.5uF
K is the tolorance +/ 10%
Common tolerance Codes:
-----------------------
F 1%
G 2%
J 5%
K 10%
M 20%
Z +80%/=20%
High Pass Filter
------------------
Pass high frequency
blocks Low frequency
RC Circut of High Pass Filter
-------|| ------->
|
Resistor
|
V
GND
This type of capacitor also functions as a coupling capacitor because it couples the AC signal from one part of a circuit to another, while blocking the DC.
So the formula to calculate the frequency of an RC circuit is, frequency= 1/2πRC. Doing the math, we get, frequency= 1/2πRC= 1/2(3.14)(1000Ω)(0.00000001F)= 15,923 Hz.
Therefore, this RC circuit will pass frequencies above 15,923Hz with barely no attenuation. Frequencies below 15,923Hz will be attenuated. The further away and lower it is from 15,923Hz, the greater the output signal is attenuated.
Low Pass RC Filter
-------------------
A Low pass RC filter, again, is a filter circuit composed of a resistor and capacitor which passes through low-frequency signals, while blocking high frequency signals.
To create a low pass RC filter, the resistor is placed in series to the input signal and the capacitor is placed in parallel to the input signal, such as shown in the circuit below:
-------------(Resistor) -------->
|
_______
_______
|
|
|
V
GND
The formula to find the frequency cutoff point of an RC circuit is, frequency= 1/2πRC. Doing the math, with the values shown above, we get a frequency of, frequency= 1/2πRC = 1/2(3.14)(1KΩ)(10nF)= 15,923 Hz, which is approximately 15.9KHz.
This means that all frequencies above 15.9KHz are attenuated. And as you get further (higher) from the 15.9KHz region, the attenuation becomes greater and greater.
Frequencies below 15.9KHz are passed through without attenuation.
