The only Guitar Leads, Play Along Course. Full speed and half speed audio, accompanying tabs. See it, hear it, play it. Its that simple. No need to wait years to play. The Vox AC15CC, or AC15 Custom Classic is a nice amplifier despite being manufactured in China, it has plenty of character and tone. Still, there are plenty of. Want to build your own tube amplifier for guitar There are many options build a kit, build from an existing schematic, or branch off like I did, and try somethi. An electric guitar is a fretted stringed instrument with a neck and body that uses a pickup to convert the vibration of its strings into electrical signals. Guitar Repair Shop Articles and information on guitar repair and maintenance. Many useful tips and related links. GT Gotoh Guitar Parts. All GT Gotoh Machine Heads come with screws, nuts,as a complete machine head set packaged in casing. GT Machine Heads are manufactured in. The term jazz guitar may refer to either a type of guitar or to the variety of guitar playing styles used in the various genres which are commonly termed jazz. Get the guaranteed best price on Fuzz Boost Effects Pedals like the ElectroHarmonix Nano LPB1 Power Booster Guitar Effects Pedal at Musicians Friend. Get a low. Guitar Tube Amp 2. Steps with PicturesTraditional tube amp power supplies are old school relatively high voltage, with big iron, and generally not regulated. Typically, they supply a range of voltages for different purposes a current source for the output transformer, voltages for the preamp tube plates, and sometimes in this case a separate voltage for the pentode screens. Unlike regulated supplies, the different supply voltages are created with current limiting resistors. These are often called voltage dropping resistors, but their operation depends on the current draw of each stage. Designing a power supply. The first step is choosing the right power transformer see the How did this project get started section. To pick the right transformer, look at the data sheets for the power tubes. Descargar Autocad 2005 Para Windows Vista there. The 6. DG6. GT tubes have a max plate voltage of 2. V. Theoretically, an AC RMS voltage is 0. RMS. In practice its lower the transformer is under load, there are losses in the caps, etc. So something less than 1. Gotta dig that crazy square root of 2. Im not certain about the availability of PTs with secondaries in the 1. Enjoy the lowest prices and best selection of Tube Combo Guitar Amplifiers at Guitar Center. Most orders are eligible for free shipping. V range. But maybe the 6. DG6. GT can handle somewhat more than 2. V. Another alternative is to use a choke input power supply thats connecting the choke FIRST, before any filtering cap. A choke input should drop the secondary voltage to 0. RMS vs the 1. 4. V RMS AC secondary yields 2. VDC, also excellent. My recycled transformer was 1. V 1. 42 RMS AC, which, when rectified, in an ideal world becomes 2. VDC perfect in practice rectified, filtered and loaded, its about 1. V, still excellent. The solid state rectifying bridge was chosen over a tube rectifier to retain as much of that voltage as possible. Thats OK the much vaunted sag effect of tube amps doesnt apply to single ended, Class A amps. They draw the same amount of current whether theres an input signal or not. Also, the PT doesnt have a centertap, so unless I used two tube rectifiers or went with a half wave design, solid state was the best solution. These voltages were needed by the circuitry B. V Max voltage for the power tube platesoutput transformers. B. 2 1. 80. V A tap for the preamp tubes Added during buildB. V Screen voltage for the 6. DG6. GT power tubes between 1. V, depending on the data sheetI did the initial design using an excellent free design tool Duncan Amps PSUD2 Designer. The final result varied quite a bit from the simulation in PSU designer, however. That could be related to the unknown current suppling potential of the TV transformer but Im beginning to suspect that the 6. DG6. GT screens draw much less current than noted noted on the data sheets. A Redesign Partway Through the Project. The design evolved. Initially the first filter stage was an RC Resistance Capacitance filter, but that changed quickly. To get a clean signal, Id need to insert something like a 5. But when I saw the amount of current wasted, I balked, and changed to an LC Inductance Capacitance filter design. Also a significant change there was no B. I had planned that the preamp would run from the lower screen voltage 1. V. For the 1. 2AX7, thats a pretty low operating voltage. So the preamp supply was added. The Inductor for the LC Filter. It helped that the gutted TV also included a mighty big inductor. Its an unknown value inductors are measured in Henries, but it was matched with the TV power trannie, so I was sure it would work and it did. And honestly, an LC filter does a much more efficient job of smoothing out the supply ripples in a single stage than an RC filter does. Incidentally, it was the addition of the the LC filter pi filter that prompted me to add the standby switch the initial inductance spike exceeds the 2. V max of the 6. DG6. GTs, by a fair amount. But during the testing phase the switch wasnt wired. There have been no negative consequences and Im not sure the standby will be wired in. Its kind of silly, really NOS tubes were often run at 1. Also changed originally, the preamp plate supply was slated to run on the same voltage as the screens. But it made sense to run the preamp at a higher voltage. So an additional RC stage B. Preamp Supply. Preamp supply B. As noted, this section was inserted AFTER the first version was built. I started with a 2. RC filter, but settled on a 1. K value for a smoother supply. K didnt drop the voltage much at all which had become obvious before when building the screen supply. It would be nice to run the preamp tube directly off the B. Screen Supply. Screen supply B. Originally the second section of a two section PSU in real operation it didnt match the Duncan PSUD2 software very closely. The simulator estimated the resistor for the last RC filter at 2. K 3. 3. K. But during the build the screen voltage was much too high over 1. V. with substitution, the eventual 1. V. A 2. 0K resistor would probably work just as well. Surprisingly, the amp still functioned poorly with the initial high screen voltages, and the tubes werent damaged. Vacuum tubes are amazingly forgiving of abuse. Misc. The PS voltage dropping resistors are all 5 watt, although a 3 watt type would have been fine for the B. Regarding capacitance values, perhaps four 1. F would be too high for a tube rectifier, but isnt a problem with the SS bridge. No bleed resistor has been installed. One quirk of this amp the PS caps seem to drain through cathodes to screens the 6. DG6. GT tubes, possibly due to the very hot filaments. They keep the tube internals warm enough after power down that the tube keeps functioning for a second or two. I dont know this for sure, but when I was experimenting with triode mode for the power tubes screens not connected to main B. NOT draining. Regardless, ALWAYS check the filter caps before touching the internals. Like the whole build, the power supplys appearance is a bit inelegant, but it was modified several times during the project. Eventually it should be disassembled and reassembled in a sensible fashion. Ive included a PDF on toroid transformer construction, for the adventurous.