Twang Matic Effect for Electric Guitar

This circuit is design circuit that can be used to produce sound effects, but especially for guitar. This circuit is work with based on transistor. This is the figure of the circuit schematic.


The feature of this series is going to cut the signal and prevent low and pass only the signal with high frequency. Circuit diagram is very simple. Switch SW1 is a switch to bypass and SW2 to ON-OFF circuit. Resistor R7 which is a potentiometer used as volume control, to adjust the output level to get the signal level is best, i. e the signal with the smallest distortion.

Part:
R1, R5 = 1M
R2 = 10K
R3 = 20K
R4 = 18K
R6 = 4K7
R7 = 50K
C1 = 0.01 UF
C2 = 2uF/16V
C3 = 1uF
C4 = 0.05 UF
Q1, Q2 = 2N3302
BT1 = 9V

Octave Shift Effect for Electric Guitars

This is design circuit for producing sound effects, this is an equipment used for electric guitar is highly sought. And one of the most widely used by rock guitarists of his full equipment is sliding octave. This circuit is based on LM741. Here’s the figure of the circuit.


By applying the method of the bridge diodes in the feedback path U2 LM741, it is not linear voltage characteristics of diode-diode it will not affect the incoming signal. Strengthening the beginning of the incoming guitar signal carried by the OP-amp U1 LM741. This strengthening in such a way set by the reset signal R1 so right on the cutting position. Then to reset the R4 can be arranged in such a way to level out the same signal with the incoming signal.

Switch SW1 which is a bypass, is a switch that serves what if the unit is not used. Signals are not only duplicated it, but also made so that the sound disabled and it is one of the most interesting because the effect will be produced with unique characteristics. Memeng with such a shift would voice sounded a bit harsh.

Part:
C1, C2 = 470nF
C3, C4, C5 = 100nF
D1 = BRIDGE
R1 = 25K
R2 = 2M7
R3 = 1K2
R4 = 100K
SW1 = SW MAG-SPDT
U1, U2 = LM741

Bass Effect Guitar Preamp Circuit

This is the Bassman 5F6-A preamp contains two voltage amplifiers, one for the bright inputs and one for the normal inputs. The preamp is designed to boost the relatively weak signals from the guitar pickup and to suppress radio frequency interference. This is the figure of the circuit.


The boost comes from a medium-mu 12AY7 triode with a fully bypassed cathode. (In designs based on the 5F6-A this tube is often replaced by a high-mu 12AX7 triode.) The RF suppression results from 68k grid stoppers in combination with the Miller Capacitance of the tube. There are four inputs: fully amplified normal and bright channels (the #1 inputs) and attenuated normal and bright inputs (the #2 inputs). Except for the highest audio frequencies, where Miller Capacitance becomes a factor, the input impedance is 1 mega ohm at the #1 inputs and 136k at the #2 inputs. Based on a graphical analysis of the tube’s AC characteristics at the DC operating point, the 12AY7 amplification factor is estimated to be 49.1 and the plate resistance is equal to 29.9k. The voltage gains are thus -32.2 and -16.1, respectively, depending on which input is used. These are not the gains that are achieved when connected to the next stage, however, because the output impedance is significant: 23k.