H&G Amplification is an manufactory that designs and manufactures music amplifiers, speaker cabinets and boutique guitar effect pedals.
Three transistor fuzz effect, strong sounding. Based on the famous Fuzz Face circuit, supplement with a preamplifier. Tried operating circuit!
Q1 2N5088 pre-amplifier transistor can be replaced 2N2222, 2N3904, BC547 type. If you need tougher sound, the Germanium Fuzz Face for you.
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The operational amplifiers built a few dozen transistors attached to direct amplification circuits with high voltage. Often referred to as “op-amp”. Their properties vary widely depending on the model. Balanced inputs and outputs are usually asymmetric, high input resistance and very low output resistance. One of them is typical linearity and low cut-off frequency.
According to their structure can be constructed of discrete components or integrated circuits. The operational amplifier are historical reasons for designation, since this type of circuit during WWII analog computer developed.
Leave a CommentMatsumin wrote in his drawings Valve Caster 2007, the goal was to create a real tube boost / overdrive pedal that can run on a single 9-volt battery. It worked! Unfortunately defecate 9V battery snap. Valvecaster run well in a 9 or 12-volt power supply. 12V will give you more headroom and cleaner sound. It is designed with single coil pickups. A 12AU7 is particularly suited to this, by virtue of being virtually identical to a 12AU7 which was designed to be used at low voltages in old car radio circuits. Indeed some sources say that there isn’t really a difference between the two types and that 12AU7s are just selected 12AU7s that have tested well at low voltages.
This circuit is a good example of the low voltage art!
This one is a pretty popular now overdrive the real tube. Very nice real tube amplifier has a voice, booster little overdrive sound. Many people rely on this effect. The circuit is quite simple, and best of all the ECC82 or 12AU7 tube operating voltage of 9-12. So many people are doing it from the circuit custom guitar pedal. It has a place among boutique guitar pedals. few circuit modifications everyone can find their sound.
The design tube made with the point-to-point wiring. TONE potentiometer and capacitor (R6, C4) is a passive filter. The device structure is simple, the ECC82 dual triode circuit of the soul. This tube is designed to drive the tube is thus relatively little strengthening. but larger current running as the rest of the series (ECC83, ECC81, ECC85), and this is associated with low voltage. ECC82 only the electron tube may be, or of the same type, so 12AU7, 5814 etc vacuum tube. Interestingly enough ECC85 tube works well.
Leave a CommentGiven a legendary and unmatched sounding overdrive pedal, the Clon Kentaur. Unfortunately the price is quite high, but the magic is never cheap. There are of course aftermarket pedals and copied, even among reputable manufacturers. Not to speak about what inspired this pedal. But let’s face it, it’s not the same. It is the “magic”.
Well, maybe you cut into it. Let’s start with the most basic buffer area. Not too complicated circuitry built around the TL072 opamp chip.
We experimented with the quality of the components and values. Audibly interesting results.
The circuit is not complicated, the preamplifier is used in many places. Test circuit made that we can compare what they are doing in different parts of the sound quality. The selection of high-precision components.
There also has to be said that Gold version used TL072, Silver version uses JRC4558 chip.
We come to the most important part, it gives the familiar sound that occurs in the “magic”. This part is very interesting. Two in the loop to a double potentiometer Gain control what he does. Loop gain, low gain (P1 circle) and the larger (P2 circle) which has been cut in the resulting sound from the D1, D2 diodes, and this signal is fed back to the beginning of the loop. D1, D2 type for 1N34 germanium diodes, curiosity replacing silicon diodes 1n914.
Here’s the tone controls, Treble enhancer circuitry and power amplifier. Use TL072 circuit.
For experiments simple solution:
This is once again an important part of the circuit is interesting that the pre-amp and distortion 9v work. The 18V turn tone circuit works. two 9V battery can be produced, or a special chip circuit ICL7660 or MC34063.
/ Writing is expanding, check back later! /
Until then:
There are many things I want to try the circuit to experiment with different ideas. Replaced parts values, modify settings, or other circuit. As a result of this circuit. 12AX7 preamp tubes built. Very nice pleasant sounding. It reminds me of amplifiers in the 60s. Good guitar setup, the “bright” metallic voice.
The circuit runs on 12V. Since such a low voltage, low gain, it is necessary to supplement MOSFET amplifier circuit. MOSFET similar characteristics as triodes, so his voice is not as annoying as a transistor circuit.
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