Note: With momentary switches, it is necessary to check the pins with a meter and determine the normally open and normally closed pins, comparing to the original switch and design before wiring.
Made for switching and effects units which require a momentary connection rather than a latching connection. Side solder lugs for wire. Otherwise, it is possible to wire a momentary switch "backwards" reversed degrees and the device will not work properly.
Bottom solder lugs for wire. Click on the diagram to the left, compare the switching with your requirements. The other switch is the FSPC, with the opposite switching logic. Customer is responsible for testing and selecting the switch with the correct switching logic - Studio Sound Electronics is not responsible if the wrong switch is selected. PC terminals. Has 3 terminals. Has 9 electrical terminals 3 pole, double throw. Commonly found in effects pedals which have "true bypass". Has 9 electrical terminals 3 pole, double throw Commonly found in effects pedals which have "true bypass".
Made for PC mounting. Has 12 electrical terminals 4 pole, double throw For use in effects pedals which have "true bypass". Four poles allow additional features and switching options for your own design, such as additional LED indicators in addition to "true bypass".
With 4PDT, the options you can create in switching are limited only by your imagination! Has additional off-normal contact on the ring conductor. Chrome ferrule nut is included. Includes nut and washer. The isolation washers keep the jack from making contact with your chassis. This leaves the jack ungrounded which is needed in certain applications.
Peavey part number Also very common in guitars with active pickups, and as the input jack on some effects pedals. The ring conductor is used in these cases to "turn on" the battery by tying one leg of the battery to ground via the plug. Switchcraft 13B Jack. Tip has a shunt contact, ring contact is open circuit. Jack is in the picture to demonstrate how the washers are installed - jack is NOT included with the washers.
Two washers are used on each jack, and the "shoulders" are placed facing each other through the chassis. Jack shown in picture NOT included.
Each jack needs two washers. Nut and washer included. Nylon bushing for ground isolation. Used in many amplifiers. Unusual arrangement used in special applications. Chrome nut has male threads, jack has female threads. Leads from jack come straight down from the contacts to go into the PC board. With nut and washer. Chrome nut is included. Set of 6 washers and 6 nuts. Silver top is ridged, similar to the cap on a Marshall knob. Classic look found on Boss FX units. With set screw.
Smooth silver top. Set Screw, for smooth shaft pots. Slightly smaller than most actual knobs on MXR pedals. Diameter bottom : 20mm at the base. Height: For push-on type for knurled shafts, see the K below. Diameter bottom : 20mm, Height: Looks great on pedals. Used on a number of classic effects pedals.
Pointer extends about 3mm beyond the outside rim of the knob. Features super long life and is sealed to keep all dirt, grime and grease out of the pot. Nut and washers included. Note - not for pedals where the control pot is PC board mounted, such as the Crybaby Q.
Soldering is required to install this replacement pot. Unlike the original sealed pot or the replacement sealed Hot Potz , this pot has a slot where cleaning fluid may be sprayed.
Used in many amp models with PC board circuitry. Diameter of the body of the pot is slightly smaller than a dime. Shaft length is 10mm, and shaft is knurled for push-on knobs. Click on photo for more detail. These pots are available with optional dust caps installed. The dust caps seal out dust for reliability, longer life, and help prevent "scratchy pots" in later life. Choose pot value and dust cap option in "Select Options".
Exact replacement for the volume control pots both channels on the Orange Dual Terror Amp. Shaft length is 6. We have tested this adapter extensively, and it really does work great! Those smaller knurled shafts are typically found in Crate and Peavey amps.
Not recommended for D-shaft type shafts. Hard-to-find D-Shaft type. For knobs designed for D-Shaft pots. Download cross-reference guide for these pots. For spare or replacement nut, order the PNW nut found in this section.
Made by Alpha. Hex footswitch nut, pack of 4. Click on photo for larger view. Part D-ECB Adapters and Powering. Part PPS Part EBS Part PRC Part Part BP Op-Amp, , very common in amplifiers, mixers, power amps. Part NE Part NJM Precision Op-Amp, very low offset voltage. Part OP Part TL Part TLCP. From the 3M Company Part HFN Part FS Part FSPC. Part FST. Part FSM. The Dunlop Crybaby is a Wah-Wah pedal released around The effect is basically a bandpass filter, it boosts the resonant frequency around Hz attenuating above and below harmonics.
The rocketing action of the pedal shifts the resonant frequency up and down. Due to the great success of the pedal, being maybe the most sold guitar pedal of all times, Dunlop produced several versions of the Wah-Wah and signature models adding enclosure customization and small circuit modifications.
This study is focused on the first model, the Dunlop Crybaby GCB which is considered to have the classic wah tone. Table of Contents. The Wah-Wah Effect. VOX V Differences. Power Supply. Input Buffer. Active Filter. Output Stage. Thomas Organ patented the Wah circuit design but by the time the patent was granted, there were already dozens of copies of the pedal in the market.
Enforcing the patent was too expensive so no attempt was made to stop the knockoffs. The circuit is undoubtedly inspired on the VOX V One of the major concerns of the original VOX design was the tone sucking due to the low input impedance of the Input Stage which was Besides the Input Buffer there are only two changes in the circuit:.
The design is built using 3 cascaded transistor stages with a couple of passive components and an inductor; the simple circuit makes the power consumption below 1mA. The gist of the design remains in how the resonant frequency of an LC filter made up of a fixed inductor L 1 and a fixed capacitor C 2 can be changed using a variable resistor VR 1.
Before all Dunlop Wah pedals had wires between the jacks and the circuit board. The current revision looks much like the models that have been running since mid For more detailed info about the different versions of the circuit you can check the StinkFoot website. The single layer PCB fits without problems inside the big pedal enclosure using through-hole components.
The frequency response is characterized by a resonant peak centered in Hz with the variable resistor VR 1 at mid position. The peak sweeps up and down from Hz to 1. The selected frequencies are amplified up to 18dB while the surrounding ones are attenuated:. The circuit of these 2 pedals is pretty similar; the Dunlop design includes the Input Buffer to preserve the signal integrity but the price Dunlop slightly cheaper , quality construction and sound are really similar.
Players often decide between the two of them just on the looks. Y ou can check in the graph below how the low freq harmonics are more present in the VOX than in the Dunlop due to the Input Buffer which filters part of this bass content. The most important DC bias points are shown in the image below. It is useful for circuit failure troubleshooting:. True Bypass Switch.
The simple Power Supply Stage provides a stable energy supply to the circuit. The 9V supply will feed the transistors. The ZL9M3 is a 9. For simplification we can ignore R in3 , the input impedance is Rin1 in parallel with Rin2 and the input impedance of the emitter follower. It can be calculated following the formula:.
Active Filter Voltage Gain. The effect of the feedback network has to be taken into consideration, reducing in practice the gain to 19dB. Applying negative feedback in the transistor amplifier results in an overall reduced voltage gain and transistor input impedance with some improvements like stabilized frequency response and immunity against transistor variations.
The output of the Q 2 is connected to the K V R1 voltage divider, with the rocketing foot action the voltage gain delivered by the Active Filter Stage is regulated, from 19dB to 1dB. The last stage is an Emitter Follower used as a low output impedance amplifier with approximately unity gain. The topology is almost the same as in the Input Buffer. This block will buffer the signal taken from the wiper of the VR1 potentiometer.
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