Guitar Effect Schematic Circuit
50 volt and 9 volt supply voltage?
I am in the process of gathering parts to build a guitar amplifier. I have a question about how to go about this. The preamp/amp requires 50 volts and the effects require 9 volts. The transformer the schematic specifies is a 220V Primary, 48-50V Secondary 75 to 150VA Mains transformer. My question is: How do I divide up the supply voltage from the wall outlet into two seperate circuits, one for the preamp/amp and one for the effects chain.
The schematic I would like to use is at
http://www.diy-electronic-projects.com/p27-60W-Guitar-Amplifier
Thanks!
There needs to be more information to help you, but here’s a start.
First off, what country are you in. If you are in the US, you only need 110VAC not 220VAC. 220VAC is for europe and some other countris.
Next, do you want 50VAC or 50VDC? and how much current ?
This is true for 9V as well,. Again how much current?
The easiest and lowest cost solution is to transform down both at the same time using an AC transformer. The transformer will need to be rated for your input voltage/current (usually not a problem), and output voltage/current (usually a problem and custom).
A transformer will have separate windings on the same core that will be isolated and allow for two circuits at the same time, so not issue here.
Finding a transformer is tricky, but i have located some sources for you below. You will need to call and work out the details for your needs and custom ones can be wound to your specifications. Also you may need (2) separate ones if you cannot find one that does both.
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BBE Opto Stomp Optical Compressor Guitar and Bass Pedal $179.00 Squeeze more tone from your rig!? Players love the optical compressor in the highly acclaimed BBE B-Max bass preamp, so much so that BBE decided to offer the same compressor circuit in a stand-alone foot pedal. Opto Stomp soft-knee design offers transparent control of dynamics and very musical compression reminiscent of the classic designs of the best vintage optical-element compressors of the 50?… |
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Guitar Amplifier Handbook – Understanding Tube Amplifiers and Getting Great Sounds (Softcover) $15.49 (Understanding Tube Amplifiers and Getting Great Sounds). Book. Softcover. 240 pages. Backbeat Books #087930863X. Published by Backbeat Books… |
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Guitar Effects Pedals the Practical Handbook Book/CD (Softcover) $15.46 Starting with the dawn of effects building and continuing to the present day, this detailed compendium investigates effects pedals and how they can supercharge a guitarist’s sound. Experienced player Dave Hunter offers insight from the top builders and tips on how to get the most from each pedal. The author also dissects chains used by top guitarists in creating memorable recordings. The accompany… |
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How to Modify Guitar Pedals: A complete how-to package for the electronics newbie on how to modify guitar and bass effects pedals $69.95 This package will teach you exactly how to modify and custom tailor each of your effects pedals to your needs and tastes. No experience needed! Includes: * Complete details on how to modify OVER 80 DIFFERENT EFFECT PEDALS! * Basic Definitions and Concepts of effect pedals, their circuitry, and mods * “Walkthroughs” of various circuits – what all those parts do, and what you can change it to *… |
Disadvantages to multiple speakers on a single amp?
I have an amplifier circuit I am putting together. It is mono and it shows a single speaker on the schematic in the data sheet. If I connect multiple speakers into the output maintaining the correct output specs, (put two 4 ohm speakers in series to get a 8 ohm impedance) will I gain distortion or other undesirable side effects or should the sound be fine? I am trying to get the clearest sound possible as this is for a guitar amplifier system I am putting together so i really want good sound. I have done the calculations and I have the correct number of speakers in series and parallel to have the right number of watts and ohms on the output. I just need to know if there will be annoying effects on the sound. Thanks!
If you match the watts and impedance, you are safe. See below for my recommendations, they come from the hi-fi community and from people who do pro audio sound support at shows and clubs.
More speakers tends to increase presence, ie, the highest frequencies above 3-6 khz. This increases the impression of volume, and if you’re within your watt allowance, you actually will increase your volume, since you’re pushing more air.
It is better to have more watts in your amp than watts in your speakers. You don’t want to dime your amp, this stresses the amp and can send square wave spikes to the speakers if it glitches, which damages the speakers and can actually blow them in extreme situations.
So assuming the impedances are done correctly (ie, 8 ohms out to two 4 ohm speakers in series, that kind’ve thing) then if you have a 500 watt amp, I would hook it up to no more than 300-400 watts worth of speakers. Make sure you’re going off of RMS, not peak, when you’re measuring speaker watts, too, or you WILL blow ‘em!
Again, the benefit of this is a more hi-fi sound, no smearing or glitches, and plenty of overhead in your amp so you run no risk of blowing anything.
The side to this is that you need to make sure you have enough watts and speakers to meet your volume requirements, you can’t rely on just pushing more watts into your speakers, as again that raises the risk of blowing them.
It sounds like you’re headed in the right direction, you’re minding your Ps and Q’s.
Oh yeah, the lower you go in impedance the more watts you can get out of your amp, but also the less stable it is. Do not under any circumstances try pushing it lower than the listed stats.
For instance, if I have a power amp that states that it is rated at 150 watts at 16 ohms and 275 watts at 8 ohms, I must *not* hook it up to a 4 ohm speaker (or 2 8 ohms in parallel). This will try and draw more power than it can handle, than its been engineered for, and you run very real risk of damage.
This is especially true if you get down to the 2 ohm level. You must follow the mfg stats by the book (so to speak), and it would be good practice to assume that they’re lying a bit, and only use 70-80% of what they list. Again, that headroom thing. If you’re going to sink money into this, then be safe! The side benefit is better sound quality, especially for bass.
Saul
Ampeg Scrambler guitar effect Demo I built SOUNDS LIKE DOOM
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BBE Opto Stomp Optical Compressor Guitar and Bass Pedal $179.00 Squeeze more tone from your rig!? Players love the optical compressor in the highly acclaimed BBE B-Max bass preamp, so much so that BBE decided to offer the same compressor circuit in a stand-alone foot pedal. Opto Stomp soft-knee design offers transparent control of dynamics and very musical compression reminiscent of the classic designs of the best vintage optical-element compressors of the 50?… |
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Guitar Amplifier Handbook – Understanding Tube Amplifiers and Getting Great Sounds (Softcover) $15.49 (Understanding Tube Amplifiers and Getting Great Sounds). Book. Softcover. 240 pages. Backbeat Books #087930863X. Published by Backbeat Books… |
|
|
Guitar Effects Pedals the Practical Handbook Book/CD (Softcover) $15.46 Starting with the dawn of effects building and continuing to the present day, this detailed compendium investigates effects pedals and how they can supercharge a guitarist’s sound. Experienced player Dave Hunter offers insight from the top builders and tips on how to get the most from each pedal. The author also dissects chains used by top guitarists in creating memorable recordings. The accompany… |
|
|
How to Modify Guitar Pedals: A complete how-to package for the electronics newbie on how to modify guitar and bass effects pedals $69.95 This package will teach you exactly how to modify and custom tailor each of your effects pedals to your needs and tastes. No experience needed! Includes: * Complete details on how to modify OVER 80 DIFFERENT EFFECT PEDALS! * Basic Definitions and Concepts of effect pedals, their circuitry, and mods * “Walkthroughs” of various circuits – what all those parts do, and what you can change it to *… |