The LoBat™ low battery indicator circuit is designed for use in electric guitars and basses with active pickups and electronics that use 9 volt batteries. Lights when battery voltage is below 7.7V. This early warning notifies the player it's time for a new battery days before tone begins to suffer!

High quality metal film resistors from Vishay / BC Components. PR02 resistors are rated for 2W but have a compact 3.9x12mm package. These resistors look great in vintage and vintage-style builds and have been used in high-end Marshall amplifiers and other audio equipment. Construction: A homogeneous film of metal alloy is deposited on a high grade ceramic body. After a helical groove has been cut in the resistive layer, tinned connecting wires of electrolytic copper or copper-clad iron are welded to the end-caps. The resistors are coated with a red, non-flammable lacquer which provides electrical, mechanical and climatic protection. This coating is not resistant to aggressive fluxes and cleaning solvents.

High quality metal film resistors from Vishay / BC Components. PR03 resistors are rated for 3W but have a compact 5.2x19.5mm package. These resistors look great in vintage and vintage-style builds and have been used in high-end Marshall amplifiers and other audio equipment. Construction: A homogeneous film of metal alloy is deposited on a high grade ceramic body. After a helical groove has been cut in the resistive layer, tinned connecting wires of electrolytic copper or copper-clad iron are welded to the end-caps. The resistors are coated with a red, non-flammable lacquer which provides electrical, mechanical and climatic protection. This coating is not resistant to aggressive fluxes and cleaning solvents.

Bourns Mini Carbon Element, DPDT Push Pull Switch, Single Audio taper Potentiometer. Split Shaft, Solder Lugs.
This Bourns Guitar Potentiometer with Push-Pull Switch allows the guitarist multiple functions utilizing a single control such as split-coil switching for humbucking pickups or stacked single-coil pickups, active electronics activation, and pickup phase switching.

• 17mm Body Diameter
• 300° rotation
• Power Rating: 0.1 watt
• ¼" Knurled 18-Spline Split Shaft
• DPDT Push-Pull Switch
• ⅜" Bushing Length
• Tolerance: ±20 %
• Maximum Operating Voltage: 150V

High quality metal film resistors from Vishay / BC Components. PR01 resistors are rated for 1W but have a compact 2.5x8mm package. These resistors look great in vintage and vintage-style builds and have been used in high-end Marshall amplifiers and other audio equipment. Construction: A homogeneous film of metal alloy is deposited on a high grade ceramic body. After a helical groove has been cut in the resistive layer, tinned connecting wires of electrolytic copper or copper-clad iron are welded to the end-caps. The resistors are coated with a red, non-flammable lacquer which provides electrical, mechanical and climatic protection. This coating is not resistant to aggressive fluxes and cleaning solvents.

Pure Tone’s new long threaded three pole (stereo) 1/4" jack provides full contact for improved connections and signal integrity. This jack locks the cable securely into place creating a greater surface area connection to carry more signal for an improved frequency stability. This jack is a great choice for both mono and stereo applications as well as guitars using active electronics.

Mini Carbon Element, Push Pull Switch, Dual Audio, Solid Shaft. 17 mm body diameter. 1/4" watt, 300° rotation. DPDT, 6mm shaft diameter. Solder lugs. 3/8" bushing. Bourns® Model PDB183-GTR21 Guitar Potentiometer with Push-Pull Switch. Used for Split-Coil Pickup Switching Electric guitar manufacturing is a multi-billion dollar industry with major manufacturers established worldwide. From the introduction of the first mass-produced electric guitar in 1950, guitarists have been mesmerized with advances in technology and the wide array of after- market parts commercially available for guitar upgrades. Specialty products such as Bourns® Model PDB183-GTR21 Guitar Potentiometer with Push-Pull Switch allow the guitarist multiple functions utilizing a single control such as split-coil switching for humbucking (double-pole) pickups or stacked single-coil pickups, active electronics activation, and pickup phase switching.

The NJM4580D (JRC4580) is a dual opamp popularly used in many distortion pedals. This chip is a dual operational amplifier, specially designed for improving the tone control, which is most suitable for the audio application. Featuring noiseless, higher gain bandwidth, high output current and low distortion ratio, it is most suitable not only for acoustic electronic parts of audio pre-amp and active filter, but also for the industrial measurement tools. It is also suitable for the headphone amp at higher output current, and furthermore, it can be applied for the handy type set operational amplifier of general purpose in application of low voltage single supply type which is properly biased of the low voltage source. Features:

• Operating Voltage ±2V~±18V
• Low Input Noise Voltage 0.8µVrms typ.

NJM4580L dual op amp from JRC in a SIP8 package. The NJM4580L is the same as the DIP NJM4580 (JRC4580) otherwise. The SIP version is a great replacement for dual op amps in vintage circuits as well as a space saving package for some PCB layouts. The NJM4580 is a dual operational amplifier, specially designed for improving the tone control, which is most suitable for the audio application. Featuring noiseless, higher gain bandwidth, high output current and low distortion ratio, and it is most suitable not only for acoustic electronic parts of audio pre-amp and active filter, but also for the industrial measurement tools.

Low residue, no-spill. Thermal stability enabling excellent wetting and reduced carbonization at soldering temperature. No-clean flux can be removed by wiping with a cloth or with cleaning solvent. Nonflammable and non corrosive. Recommended for electrical and electronic soldering applications.

Genuine Fender® Mid Boost upgrade kit for Strats with active electronics. This circuit is used in the signature Eric Clapton and Buddy Guy strats and is commonly referred to as the Clapton Boost. The Mid Boost knob adjusts gain from 0 dB (no boost) to 25 dB (maximum boosted mids). This boost sounds great clean and adds powerful control to distortion.

The DMT is a passive dual mode guitar tone control designed specifically for electric guitars that can operate in either HIGH PASS or LOW PASS modes greatly expanding the instruments tonal possibilities without the use of a battery or active electronics. Micro switches on the circuit board provide the user the ability to select one of two different frequency ranges for both high and low pass modes. Easy installation with no capacitors or other parts needed. Replace the tone control in you guitar with one that you will actually use!

TLC274 quad op amp in a 14-pin DIP package. The TLC274 quad operational amplifier combines a wide range of input offset voltage grades with low offset voltage drift, high input impedance, low noise, and speeds approaching that of general-purpose BiFET devices. These devices use Texas Instruments silicon- gate LinCMOSTM technology, which provides offset voltage stability far exceeding the stability available with conventional metal-gate processes. The extremely high input impedance, low bias currents, and high slew rates make these cost-effective devices ideal for applications which have previously been reserved for BiFET and NFET products.

LM318 single op amp in an 8-pin DIP package. The LM318 is a precision, fast operational amplifier designed for applications requiring wide bandwidth and high slew rate. They feature a factor-of-ten increase in speed over general-purpose devices without sacrificing dc performance. These operational amplifiers have internal unity-gain frequency compensation. This considerably simplifies their application because no external components are necessary for operation. However, unlike most internally compensated amplifiers, external frequency compensation may be added for optimum performance. For inverting applications, feed-forward compensation boosts the slew rate to over 150 V/µs and almost double the bandwidth. Overcompensation can be used with the amplifier for greater stability when maximum bandwidth is not needed. Further, a single capacitor can be added to reduce the settling time for 0.1% error band to under 1 µs.

The LEHLE MODULE SW is a true bypass switching unit with relay and an active pop suppression function controlled by an intelligent microcontroller circuit, thereby allowing the LEHLE MODULE SW to switch even faster than mechanical switches, noise-free and without wear.

Keep those fumes out of your face while soldering with this benchtop smoke absorber.

• Removes flux fumes from soldering workbench
• Great for workspaces using more active fluxes used with lead-free solder
• Fumes are absorbed by the replaceable carbon-activated filter
• Includes one replacement filter (S-TWSA350F)
• Stand allows the smoke absorber to be adjusted to varying angles
• Fan is quiet and will not add significant noise to the workspace
• ESD safe
• Air Flow Volume: 1370 l/min
• Wattage: 20 watts

DeoxIT® D5 is a contact cleaner featuring a deoxidizing solution that acts fast to dissolve oxides, sulfides, and corrosion that forms on metal. This cleaner can enhance conductivity without causing shorts, virtually eliminating intermittent signals while improving signal quality. DeoxIT® D5 fills in microscopic gaps to reseal surfaces. The protective coating acts as a lubricant to reduce wear and abrasion.

The Spin Semiconductor FV-1 is a complete reverb solution in a single IC. With integrated stereo ADC and DACs, the FV-1 can be treated like any other analog component in your product's signal path. The FV-1 can access a total of 16 programs, 8 are built into the internal ROM and the designer may elect to connect a serial EEPROM with 8 additional programs. By using an external EEPROM, the designer can distinguish his product from others by creating a custom program set without the need for a microprocessor in the system. With 3 potentiometer inputs, programs may have real time variable parameters such as decay time in a reverb, rate and depth in a chorus or frequency in a filter. These inputs are available as coefficients to your program and may be used independently of each other. The rich instruction set allows users to program effects of all kinds. With instructions like LOG and EXP, users can easily program audio expansion and compression routines.

The second of two legendary SSM filter updates, the FatKeys™ SSI2144 is a dedicated four-pole low-pass ladder filter with on-chip resonance control. Original designer Dave Rossum did a number of performance updates such as lower noise, improved control feedthrough, and logical pin grouping but otherwise left this sweet-sounding VCF alone. The SSI2144 reprises the SSM2044 of legacy chipmaker Solid State Micro Technology, which many believe to be the best-sounding analog synthesis filter IC ever produced. Based on Dave Rossum’s patented classic improved ladder topology, the SSI2144 allows rich tonal characteristics that showcase the very best attributes of subtractive synthesis. The SSI2144 uses the same internal circuit as the SSM2044 but incorporates improvements by the original designer and takes advantage of modern process technology.

OP275 dual audio op amp in an 8-pin DIP package. The OP275 is the first amplifier to feature the Butler Amplifier front end. This new front end design combines both bipolar and JFET transistors to attain amplifiers with the accuracy and low noise performance of bipolar transistors, and the speed and sound quality of JFETs. Total Harmonic Distortion plus Noise equals that of previous audio amplifiers, but at much lower supply currents. A very low l/f corner of below 6 Hz maintains a flat noise density response. Whether noise is measured at either 30 Hz or 1 kHz, it is only 6 nVHz. The JFET portion of the input stage gives the OP275 its high slew rates to keep distortion low, even when large output swings are required, and the 22 V/µs slew rate of the OP275 is the fastest of any standard audio amplifier.

This quad flip flop is a part used in our Relay True Bypass Switching Part 2: Momentary and Soft Touch Switches article. To read the full article and learn about a circuit for relay switching in stomp box effects, please see the following link. https://www.amplifiedparts.com/tech-articles/relay-true-bypass-switching-2 These monolithic, positive-edge-triggered flip-flops utilize TTL circuitry to implement D-type flip-flop logic. All have a direct clear input, and the '175, 'LS175, and 'S175 feature complementary outputs from each flip-flop. Information at the D inputs meeting the setup time requirements is transferred to the Q outputs on the positive-going edge of the clock pulse. Clock triggering occurs at a particular voltage level and is not directly related to the transition time of the positive-going pulse.

This 12 inch ruler is a durable straight edge for measuring, marking and cutting. Made of flexible stainless steel with non-slip cork back. Includes wear resistant etched markings in inches, cm and mm.

• 12" Stainless Steel Ruler
• Nearly indestructible, warp-free, bend-resistant stainless steel ruler
• Etched with 1/16 and metric markings to ensure easy readability
• Flexible for measuring curved surfaces
• Non slip cork backing
• Numerals and graduations are sharply delineated
• Attractive finish fits right into modern office environments

DeoxIT® GOLD GN5 Spray (formerly ProGold), 5% solution, 163 g, non-flammable, quick dry - non drip, and safe on plastics! Cannot ship by Air or Mail. Must ship UPS ground.

Speaker, Celestion, AN3510 Compact Array, 3.5 in., 8 ohm Features:

• Compact and lightweight, full-range neodymium loudspeakers
• Advanced Finite Element Analysis techniques used for acoustic, mechanical and electromagnetic modelling
• Ideal for applications such as portable line arrays where actively controlled wavefront (beam steering) is used
• Delivers wider dispersion to higher frequencies than many equivalent compact, full-range drivers on the market
• Chassis purpose-designed for maximum free air movement, with square mounting frame to facilitate close coupling of multiple units
• Stiff and light aluminium cone remains rigid to higher frequencies, delivering a smoother response in the critical listening band
• Half roll elastomer surround provides damping for unwanted resonances and sustained centring control at extremes of excursion
• Designed to be weather resistant for outdoor applications