Humbucker. Molonator resonator guitar, resonators. A Resolectric Conversion. This page describes a project in which I added a National-style resonator cone to an electric guitar. The Guitar Luckily, I was able to solve all these problems by removing 5/8" from end of neck (cutting it back to a 22 fret neck), shifting the neck down by 5/8" in the neck pocket and shifting the bridge by the same amount. This freed up space for a pickup, moved the cavity away from the belly cut and allowed the resonator cover to hide the existing routes. The Resonator CavityI made a very simple circle cutting jig from a 1' square of 3/8" plywood with a pie shaped piece cut out of it. When rotated about a nail at the center, the jig sweeps out a 9-1/2" diameter circle. Details of the jig can be found here. Along the right side of the cavity are angled pins to hold the wiring away from the resonator cone. There are a couple of irregularities in the cavity. Feel free to contact me if you have any questions or comments.
Mini Amplifier. Circuit diagram: Parts: R1______________22K 1/4W Resistor C1______________10µF 25V Electrolytic Capacitor C2_____________100nF 63V Polyester or Ceramic Capacitor C3_____________220µF 25V Electrolytic Capacitor IC1__________TDA7052 Audio power amplifier IC J1,J2__________6.3mm Stereo Jack sockets (switched) SPKR___________8 Ohm Loudspeaker (See Notes) B1________________9V PP3 Battery or 3V Battery (2 x 1.5V AA, AAA Cells in series etc.) Clip for PP3 Battery or socket for 2 x 1.5V AA or AAA Cells Comments: This small amplifier was intended to be used in conjunction with an electric guitar to do some low power monitoring, mainly for practice, either via an incorporated small loudspeaker or headphones.
Notes: For the sake of simplicity and compactness, this unit employs a dual bridge IC amplifier and a few other parts. Technical data: Max output power: 1.5W @ 9V supply - 8 Ohm load; 60mW @ 3V supply - 8 Ohm load Frequency response: Flat from 20Hz to 20kHz Max input voltage @ 3V supply: 8mV RMS. How to Build the CMoy Pocket Amplifier. Effects descriptions. For a given input waveform, say a sine wave, the tops and bottoms of the waveform are clipped equally, symmetrically. Although the musical implications are more involved than this simplistic explanation, for a simple sine wave, symmetrical clipping generates only odd-order harmonics, giving a reedy, or raspy sound to the resultant waveform. The hardness or softness of the clipping matters. Hard clipping results when the output wave equals the input up/down to a certain level, then stays at the clipping level until the input drops below the clipping level again, giving perfectly flat tops and bottoms to the clipped output.
Soft clipping has no abrupt clipping level, but gently rounds the top/bottom of the output wave so the waveform is "softly" rounded on top/bottom, not flat-topped. Some solid state devices actually flat top, then invert, producing a hollow topped output waveform at hard clipping. There is a continuum of clipping hardness, depending on the circuitry used to clip. No star grounding.