Repository-circuits
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even if I didn`t read thoroughly nice one almost enough xformers , but certainly not enough shunt regs.... -
The Elector Crescendo was my first DIY amp that wasn`t a kit. I borrowed the Elector magasins at our local library and had some `amateur` make the.... -
First of all, the circuit is ok, but it`s rather unstable. It varies with temperature, and, for eg, I turned it on and I tune it. Them I switch it.. -
Hello, I`m a noob to this forum, and also to circuit design. I`m also interested in a specific project and I thought I`d try to glean a bit of.... -
Hi! I have a 4x10"" Ashdown ABM bass cab driven by a Hughes&Kettner bass top. I just had the idea of modifying the bass top to act as a.... -
Originally Posted by dscottguitars A rotary 3 position 3 pole switch. In one pole, through a cap out the other pole, no bleeding from one cap to the.... -
The schematic here is of the original Music Man Stingray bass guitar preamp. It runs off 9VDC and I have left off the voltage divider part of the.... -
There is considerable hiss brought on by the circuit. Cutting the treble knob helps greatly (but no fun with treble cut!). When the vibrato circuit is active, the his is worse. Following these discoveries, I re-capped the board given the schematic values as.... -
Hi again, I`ve got a `72 twin reverb on the bench and I`m looking for advice. I`ve never worked with a twin before. This model is silverface, pots and .... -
Hi, can anyone explain what the four transistors on the right hand side of each of McBride`s schematics are doing?.... -
Wow. System 7 thankyou so very much for your appreciative response to my Humble creation. My wife would not say i was gifted but Anal to the ooint.... -
Tone controls are something of a no-no in high-price audio. But what is a high-price audio cable but a high-price tone control? Now, you can buy or.... -
Hello I was, since few months, looking for an easy to build PWM inverter, and without any PIC programing. Looking at a 555 PWM amp circuit, I have an.... -
Ohh ok cool, I have forgotten about the -12 supply because my 555 Oscillator doesn?t use a -12 supply, it only uses a +12 and a Ground. You see on my.... -
I have designed a simple Electric Guitar SPICE Subcircuit that includes a Signal Generator 440Hz Sine Wave Output at 100mv. The Parameter ""440&quo.... -
Hi, I`m working towards an hybrid amplifier where the VAS will be the Aikido, where the OPS is some Emitter-Follower variation. Unfortunately my.... -
Originally Posted by tiefbassuebertr Unfortunately I find only RF amplifier devices there (lowest frequency: 10 KHz). It would take the colloquial.... -
Originally Posted by shaan Increasing Iq will result in more 4ohm power? Ya I think I understand now. Ya, once I decreased the supply voltage and.... -
Apex seems i begin to love this amp the corrected clear schematic is this with different R14 values(tried 22k,30k,56k) and different supply.... -
Hi All, I have been trying to come up with a simple soft start circuit that routes power initially through a resistor or thermistor and then activates .... -
I don`t like motor potentiometers, especially if there are cheap and small attenuators but big motors. But big blue alps like ebay item No.... -
Hi all, I completed my first amp a few months ago. It was more a test than really something to listen to. It used the 9240/240 Mosfets. Now I want to.... -
I used some schematics from Elliot sound products to help with this circuit. L-In and R-In come straight from the speaker terminals, +ve and -ve are +25 and -25 volts from the power supply. When the circuit detects DC, transistor 2 is turned on and the 25.... -
Hello, I am new to electronics. It has recently become a hobby. I have built a few guitar pedals and small amps. My project I`m working on now is an.... -
Because i cant get help with this in tubes/valves section, i`m opening thread here with HOPE , that SOMEONE whould be able to HELP ME. I need help.... -
Dear Susan, your amp is similar to this one which has even a lower parts number. It deserves to be built!.... -
Classic 6-Transistor circuit (many variations of this where around in the 1960`s & 70`s), NPN only output devices, fairly high level of Bias, single rail, input and output coupled via a capacitors (electrolytics - no less), clever feedback loop, bootstrapped.... -
The amp appears to be unused, still has the plastic film stuck to it. One of the 211`s has a loose component rattling around inside so we will need to get one of those. As I said in my earlier post, it is the possitioning of the 6 smaller valves that we are.... -
So there I was, ripping out a solo during a practice on my ""new"" Hammond C2 organ and the sound falls away and gets soft to the point of no.... -
Ty- Regarding your updated drawing of the AF/PI stage: - I don`t think R45 exists? - The disk cap bypassng R44 is labeled 68NF750 10% which I assume.... -
This is a very nice amplifier design and it is very difficult to improve it. I am glad about the results because that's a very good way to verify my 6DJ8 and 6L6GC Spice models, like I tell you before, the 6L6GC and 807 have very close caracteristics and.... -
After much reading and discussion, I think I`ve settled on the plans for an upcoming build for a single-ended 300B integrated amplifier. The circuit....
New Circuits
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This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is.... -
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to.... -
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This.... -
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the.... -
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,.... -
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the.... -
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power.... -
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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