Simple Tube Guitar Amp Schematic For Sale (2024 Update)

I was interested in this book, and wanted to preview the table of contents to see what was in it. Since it's an electronics book, it would have been nice to see an actual section of the content. This was not possible since the cover, the inside cover and the author's description are the only three pages that you can preview. Hint to author: You would probably sell more books if the potential buyer could actually preview the book contents and not the cover.newideam-21

Because the Stage Right 5-watt tube amp (#611705) has control knobs only for Volume and Tone, I found that I get the best-to-my-ears guitar sound when I put an equalizer pedal between the guitar and amp and then adjust the equalizer to the tone that I'm looking for. On the guitar the Volume and Tone knobs are set fully open and on the 5-watt tube amp the Tone knob is fully closed and the Volume knob is set to the volume level acceptable to the environment (for home practice the Volume knob is set to level 3 at full 5-watts). The Stage Right 5-watt tube amp is my first tube amp after having used modeling amps for at least five years. I had heard that tube amps more often than not sound better than modeling amps. After now having experienced using a tube amp I agree that tube amps (at least the Stage Right 5-watt amp) sounds better than the modeling amps I've used (which to me sound great too). If you're looking for your first tube amp (like I was) or you are looking for a low-watt tube amp for home use then I highly recommend the Monoprice Stage Right 5-watt tube amp #611705. Review about Monoprice customer support: The 5-watt tube amp that I initially received had a cosmetic defect (a hole) on the textured surface on the front side of the amp. The Volume knob when set to fully opened level 10 produced normal speaking level sound instead of the noise-complaint loud volume that I expected. Monoprice customer service was great and easy to work with in submitting an amp replacement request. I described the problems, sent pictures of the cosmetic defect and a video demonstrating the Volume problem. After Monoprice customer service reviewed the pics and video they sent me a free shipping return label, a RMA label, and they ordered me a replacement amp which arrived within 7 days after I submitted the replacement request. The replacement amp that I received had no cosmetic defects and the Volume knob set to max level 10 is loud enough to generate noise-complaints from neighbors, though I normally use the amp at Volume level 3 for home use.New User

For the price (I got it when priced $119) it is fantastic. It's simple, straightforward and sounds good. Nice warm tones. If you're a fantastic guitar player, this amp will sound fantastic. If you're an okay guitarist, you might want to invest in some pedals (or just keep practicing). I only say that because it is very clean and bright and it really shows off what you're playing. (I've been known to hide my sloppiness with reverb, distortion, etc.) BUT It does take pedals well – thankfully! Adding a good reverb pedal, delay and an overdrive to go along with this little guy is a good idea. The Pros: Value to Price ratio. Looks well built. Warm tube sound. The handle (yes I am talking about the amp's handle) is nice! Better than I expected. In fact, everything looks pretty good (except the cheap control knobs). 5 watts is plenty loud for home/recording use. The Cons: Good sounding, but there are better sounding. Please don't buy this thinking that this is a $500 amp. It is not. But sub $200 it is a good one. The chickenhead knobs are cheap looking. I took them off and painted them. But that's a dollar or two easy fix (if it bothers you at all). Overall: I totally recommend for $150 or less. Probably for $200. If the prices climb too much beyond that, I think there are other options. If you want to jam at home and record with it, I think you'll be happy.Brad

The Monoprice 5 watt guitar amp arrived just a few days after ordering, and arrived in good shape, due in part to the excellent shipping carton. Upon taking it out and inspecting it, I could find no flaws in the cabinet, and due to the cream color of the covering, it seemed a little bigger than I was expecting. I plugged it in, let it warm up for almost an hour, and then plugged in an ES339, using no pedals. At first, I wasn't all that pleased with the sound I was getting, but it was my fault. I had it adjusted as I do with my Albion Hybrid, but that wasn't the way. I found the best sound came from turning the Monoprice all the way up, and then use the guitar controls for volume instead. That did it, and the little amp came a alive in a big way! Sounding very similar to a Fender champ, it could go from nice clear tones to crunchy heaven with the ES339's humbuckers. I plugged in a Strat with an HSH configuration, and the single coil really made it sound Fenderish. Sweet. The only thing I found one might improve on the amp, is the speaker. As such, I plugged into the built-in external speaker jack on the back, a little Randall 8" cabinet. That really did it for me. The sound was fantastic through the entire spectrum, and was loud enough to be heard down the block. I then bi-amped it with the Albion, and the sound had all the creamy goodness I've been seeking, and that is how I now have it setup for daily use. That said, there's nothing wrong with the stock speaker on the Monoprice, and I suspect it will satisfy most users. Am very happy with this purchase, and glad I bought it for such a great price. Almost every electric guitar player could find a use for this amp. Buy before the price goes up, or they quit making them!T

Gerald Weber is a legend in the world of tube amplifiers, he does a very good job at explaining things in a clear way so the reader can understand without needing a degree in electronics. If you have an interest on the workings of tube guitar amplifiers and want a better understanding of why they work and sound the way they do then you need to read this book. By the time you finish reading this book you will have a much better understanding of how your amps work and how to get great sounding tone out of them.dirtbomb666

I recently completed the British 18W head kit from Tube Depot, and can't say enough good things about it! From start to finish, the kit exceeded my expectations. Ordering, shipping, and customer service were top-notch. No issues with components. The instructions and documentation were amazing, worth their weight in gold. The end result was an amplifier that sounds incredible! I incorporated a few of the suggested options- PPIMV, Tremolo HI/LO sw., Tube/SS Rectifier sw., and choke. The sound is amazing, I'm finding it very difficult turning the amp off- once I start playing through the amp I don't want to stop. I would absolutely recommend Tube Depot for anyone interested in building a guitar amplifier. The clear, well-written instructions really made this an enjoyable project. This was my first amplifier build, and I had no issues thanks to the great documentation.Dave R

I ordered this kit with a mod to use KT 66 power tubes. The changes were easy to make and it sounds fantastic. The classic JTM 45 tone at a manageable volume level with the master volume control. Just to test it out I've used a power soak and the tone is exactly the same using the master volume. A couple of real nice features of the design are the negative feedback switch and the ability to switch between solid state and tube ratification (the tube sounds better to my ears). Great product!Clint

The Ac-10not only looks the business but it has since real depth and warmth to its tone. Clean – it’s bright and has the chime you’d expect. Turn up the gain and your tone breaks up but still retains clarity. Having the gain wide open and master volume down means you can still have the saturated crunch but not disturb others . Perfect for home use but would not be out of place in a small pub gig. Takes pedals will and with a multi-fix like a GT 100, if you disable the amp sim and use like a conventional pedal board, you don’t lose any quality of the AC10’s natural tone. A masterful amp and it even smells nice with those tubes cooking.Mark R.

Ive been playing 35 years and this is probably the best all around practice amp ive ever heard. Pros- looks great, sounds very good, cleans thump and chime, distortion can wail. Its loud for its size. Seems built well. Have had no bad issues. Cons- clean isnt near as loud as w the gain cranked up. No reverb. In short if this amp was 50-100W and had reverb and an external speaker jack id never play another amp. Good job VOX.jjsrvfan

I'm running this through a 1×12 Bugera cab (which to my ear is a pretty neutral speaker, but sounds great). Unless your band plays way too loud this amp should give you enough volume for gigging (even at 25 watts through an 8 ohm speaker). Takes pedals well – all of my drive pedals sound great. The MV50 reacts like my tube amps with a boost pedal in front (Fulltone & Xotic). I really like the attenuator, and at home I play at 1/100 power with the volume at about noon. While this amp has a lot of clean headroom you will start to get some hair when you push it, but in a good way. It's the kind of sound where you can play clean by picking lightly but if you hit it hard you'll hear that you're on the edge of breakup. Not surprising for a Vox, this is not a mid-scooped Fender clean. Mids are present, but not pushed. It is a warm clean, not sterile or spikey at all to my ear. I've been playing this primarily with a Boss Fender reverb pedal and the tone really is glorious. I don't feel like I'm missing anything from my tube amps. Not a thing. I wish I'd had this thing years ago when I was throwing my back out moving 60lb tube amps to and from gigs. What I don't like. The unit feels very solid, seems like a quality piece of gear, but the mini chicken head knobs on the front feel cheap (a minor complaint). Mainly I don't like how much they have crammed on the back panel. You've got tiny switches for power, flat/deep, eco (shuts it off after 15 min. of non-use) and the attenuator, as well as headphone/line out & speaker out. Once you get a speaker cable plugged in it feels very cramped. I'd much rather that the power switch was on the front. Lastly, I wish I could get 50 watts @ 8 ohms, just for the headroom. This is giggable for me at 25 watts into 8 ohms & still gives you good headroom, but YMMV. I primarily use single coils. With hot humbuckers I don't know if you'd run out of clean headroom or not. With all 50 watts you'd be fine, I'm sure.NE Guy

First – let me say that this is a good, tiny pedal-platform amp, if that's what you're looking for. It has a very good base clean tone and it takes pedals well. I think most players looking to downsize would find this usable. If all you need is a good clean tone – for jazz, say – take a listen to one of these. I find the 4 ohm thing a bummer. I don't own any 4 ohm cabs, and after thinking about jumping through hoops to get all 50w available to me, I decided it wasn't worth it. This amp sounds really good, but at the very least for clean headroom, anyone looking for a pedal platform usually wants to control where the edge of breakup is, or have it totally clean. Beyond that, there's just too much crammed onto the (very small) back of the amp. Tiny switches plus the speaker out jack just mean it's hard to find the on/off switch, etc. Put the power switch on the front so I don't have to hunt for it. After having the MV50 a while I decided to try a DV Mark Micro 50 – and I like it better than the Vox. It's more versatile with 3 band EQ, and I have a full 50w to play with. Overall I prefer the DV Mark – I just feel it suits my clean & light OD tones better than the Vox. But if I had to gig with the Vox I'd be OK with it. Having said that, several months ago I came across a great deal on a Blues Cube Hot EL84 (more Vox-ish tone than the standard) and frankly, it blows the other two away. It's a combo, of course. So I'm keeping the DV Mark as a backup. The Vox has gone. Anyone looking to downsize should give one of these a listen. There is good to great tone in there, depending on your needs. Again – the 4 ohm load to get 50w is a bummer. But not everyone needs that much power. The small box is pretty cute and a cool conversation starter – but for practical purposes something slightly larger would've been a better idea, IMO.Mr. Joe

For those of you who like short reviews: Overall, I thought that this book was worth the cost. Here are some thoughts on specific sections I had as I read the book: This book was published over twenty-five years ago. I mention that only for those people who are concerned about such things. Designs for Tube-type Instrument Amps were more or less codified another twenty years before then, so it is pretty much a moot point for me. That said, there is a Chapter on Speakers that could be updated. While underlying concepts remain the same, today´s Speakers are made of new, improved materials. If you own a tube amp and know little or nothing about tube amps or amp electronics in general, then Chapters Fifteen and Sixteen, ´What NOT To Do´ and ´Technical Tips´ are probably worth the cost of the book right there. If your interest in this book is Amp Mods, be aware that the author is a Marshall kind of guy and although Basic Principles remain the same, modifications for other brands of amps are not described. There are also some Troubleshooting Flowcharts included. I have not had occasion to use them, but they look very well done. This book is not a collection of schematics and is not intended as that sort of reference work. Bearing that in mind, a few schematics or circuit sections could have been very helpful in illustrating the text. A sample schematic would be especially useful in the chapter on biasing. Final assessment: This is a good introduction to the topic of Tube Amps. Techs and other Advanced Readers might want to look elsewhere. This is Technical Material, so you can expect some Math, Science and Big Words, but there is nothing here beyond the High School level. Recommended for Beginners and Early Intermediate.michaelmx

Any guitarist wanting to learn more about how their tube amp works and how to service it should consider picking up this book. Plenty of theory without it becoming overwhelming and lots of essential information how to keep your amplifier working. Highly recommended reading for all guitarists.dirtbomb666

I just completed my Mod 102 kit. An excellent experience! I was delighted with the quality of components, clarity of instructions, and, perhaps most importantly, the sound of the amp. It is very loud – currently running into my Fender Twin Reverb cab (2×12) and very sweet! I will be running it into a new 1×12 cab with a new Celestion G12 M Heritage 'Greenback' when I get a case for the speaker (on order). My only criticism (and something to look out for) is that the chassis is very nicely painted in gray gunmetal paint. Even following the directions to file all the holes, it is very hard to get a good ground connection at every point a terminal strip connects. I worried about this, and about 1/3rd of the way through the build, took an ohm meter to check all the connections, and as I had suspected, some of the connections were not great (9-10 ohms or so!) So I removed the terminal strips (with the components I had already soldered still attached) and scraped away the paint under the tabs of the strips to ensure a good connection. Re-testing showed virtually zero resistance. I'd strongly recommend scraping the paint away at all holes under the chassis before getting started on the build. Even better, suggest that Amplified Parts leave the inside chassis unpainted (at least around the important holes). Aside that one criticism, I am delighted with the kit and with Amplified Parts. Everything was delivered promptly and they are a class outift. I'll probably try some of their other kits soon.vpmerlyn

I spent three evenings building the MOD102. The instructions are very easy to understand and the amp has a great Fender sound. I had one grounding issue that was easily fixed with a little help from tech support, which was excellent. If you're good at following step by step instructions and can solder well this is a fun little amp to build. Only small issue is the labels. They could stand an improvement.Brandon

I just finished this amp build and it sounds fantastic! I also just finished a Marshall 18 Watt clone and I have to say that the Mod102+ holds its own very nicely alongside the Marshall. In fact, I will probably use the Mod102+ for recording because it sounds amazing at lower volumes (the Marshall is loud AF). Honestly, if I were only going to build one of them today, it would be the Mod. I'm blown away by the tone! Great kit with excellent instructions. Great bang for the buck. The parts all seem to be top quality. I love the old style cloth solid core wire, too. I find it much easier to work with than modern stranded wire. The labels are a bit lame but I covered them with packing tape as suggested before cutting them out and they look fine. If you're thinking about building an amp, build this one.danjbeckett

This book is extremely detailed and well written. Bought this for my dad, who does a lot of amp rebuilding. The skematics are very detailed and helpful. A must have book for the serious tube amp builder. There's even a good bit of fender history throughout the book.cooljwr79

With this book I was FINALLY able to ID my fender tube amp circuit after online searches lead me nowhere. The first hundred or so pages cover components their function in amps, and general electrical theory that pertains to amps (the section on grounding helped me quite a bit). Includes tables to identify speakers and transformers. Pretty comprehensive and easy to read. Then hundreds of schematics.sewilk-66

One of the all time classic MUST HAVE books….if you play guitar and have ANY interest in amps then you NEED this book. Amazing details and photos ….INDISPENSABLE!!! RJrjtwangs

I bought this book to learn more about tubes and amps and am very happy with the book. It focuses on guitar amps and the wiring schematics are first class. There isn't anything i dislike about the book and cd. I've bought quite a few guitar tube amp books and this is up there with the best.reddog2211

This is an excellent reference tool for anyone who wants to educate themselves on the inner workings of a tube amplifier. Complete info on amp manufacturers, tubes types, wiring diagrams, etc.dtharris2

It offers a wealth of information and clears up a lot of questions about tube amp design . Plus it is written in such a way that it is easy too follow .bluesm9289

A great book very well written and readable. Anyone considering building or repairing valve equipment should get a copy, it is not too theoretical but full of useful information and tipsgeof_s13

It is really technical, waist of time for me. There is few projects, but you can find better schematics online with better explanation.uk-gube

Where do I start? Well, how about, this is the best tube amp I have ever played! 62 years with many guitars and many amps, some owned, some borrowed, and some tested in music shops, might give me a little credibility. I have loved a Fender Twin Reverb, made in the 50s that my uncle Keith, and my guitar mentor, loaned me for a while. It just sounded so good. Never could seem to find cash, or justification to buy a tube amp, but have owned a hal a dozen solid states. THEN THIS LITTLE BEAUTY! Having played the Twin for a couple of years, and others such as a Mesa Boogie, VOX's, and too many others to recall, THIS monster sounds like most of them with just little tweaks of the knobs and my guitar switches. I have played country, 60s and 70s rock, blues, finger-style instrumentals, gospel, etc. I believe this is the PERFECT combo, with the correct (JJ) tubes, a sweet (and dirty when desired) Seventy/80 speaker, and an amazing diversity of sounds, which works in every genre I play! I do not know how anyone can find reason to bad mouth this. I had it for 2 weeks, was asked to fill an absent, guitarist's spot at an outdoor venue, I took this little amp. We played to an area the size of a football field. I set the amp on 1 Watt, until I could hear it cleanly (behind me on stage), let the sound man mic and mix me in. Never had to turn it above about 4, with gain between 1 and 4, and many complemented me on my sound, and musicians asked me WHAT IS THAT LITTLE AMP? Those are the good points. I can only think of two piddly things I would like to see changed, and one would be a standby switch, and the second being a way to run the external speaker WITHOUT cutting off the amp speaker. Until then, I will just keep playing this sweetheart amp, and enjoy the statements about "my sound," and the question of WHAT IS THAT LITTLE AMP? Keep playing everybody…and maybe buy one of these. I do not believe you will regrety it.New User

These amps are fantastic, and at these bargain prices you simply can't go wrong. I upgraded the reverb tank in mine to a Mod and changed the speaker for a Warehouse GC12. OMG, this thing is a beast! Another WGS option I've seen people use is the ET65 for a more British tone, also with good results. The stock speaker is not too bad, but this one simple upgrade of swapping the speaker takes the amp to the next level. It just sounds awesome. The upgraded reverb tank is also an improvement, but not as much as I thought it would be. If I had to do it over again I would just take out the stock tank and use a pedal for reverb and make the amp even lighter to haul around. The more important upgrade imo is the speaker. It really makes a world of difference. Grab one reasonably while you still can, the price keeps creeping up and up and up… !Jeff

After a number of FEDEX issues, I received my amp about 5 days later than estimated. It did arrive in excellent condition and was worth the wait. The Stage Right 611815 has a really sweet tone that sounds particularly good with the single coil pickups on my Fender Sratocaster Player. It breaks up nicely! The reverb works perfectly, and is fine for most playing but you might want an external reverb unit if you are playing Dick Dale tunes. A really nice feature for home playing is the 15W/1W switch, where you can limit the amp to 1 W (be aware that with sound, you have to increase the wattage by 10 times to double the perceived volume, so the 1W setting is a lot more than 1/15th as loud as the 15W setting). It is a bit unusual to have a tone control along with the more common bass, middle and treble controls. Personally, I would have labeled the Tone control as Presence, because that is what it seems to be. I have mostly been playing in the 1W mode with all the controls (including reverb) at 12 o clock, and that is working out great. As far as construction, the amp looks fantastic and gives a vintage look that hints at its tone! The dark grill cloth provides a nice contrast with the blonde tolex, giving a true vintage appearance. The retro red, jeweled pilot light and metal toggle switch complement the vintage styling Keeping with the vintage look, the control panel is chrome with retro chicken head knobs. As others have mentioned, the control names are a little bit difficult to read on the chrome panel. After you use the controls once, you know where they are, so does it really matter (I noticed the blonde version of the Fender Blues Jr also uses a chrome control panel…probably where Monoprice got the idea)? The tolex is neatly installed and glued, at least the parts that are exposed. The leather handle is also reminiscent of old school amps. And I really like the metal corner protectors…very nice. As proudly announced by a badge on the front panel, the amp is equipped with a Celestion speaker…a Seventy 80 The only criticism of the construction, and it is minor, is that the 8 external screws are not chamfered properly to mesh with the finishing washers, which result in the screw heads protruding above the washers. The amp has a jack for an external speaker. When you plug in an external speaker, the internal speaker is shut off, as is common with guitar amps. The reason is if you plug in an external 8 ohm speaker and the internal speaker would still be on, a (combined) 4 ohm load would be presented to the amplifier, which it is not designed to handle. The back is open. The line cord is not detachable, but can be conveniently stowed in the back of the amp. The amp has an effects loop, which I have not tried yet. The amp is now equipped with JJ brand tubes and a metal, two spring, reverb tank, which are upgrades from the original issue I wish I could find a nice, economical (i.e. $20) dust cover for the amp. The only ones I can find are priced at $50 or more, a bit much for protecting an inexpensive amp. In conclusion, the Stage Right 611815 amp looks great and sounds great, and I highly recommend it.Chris

I bought this amp on a wim and I'm glad I did. I wanted a light weight little tube amp to lug around to play small gigs with. I'm old and I don't like to bring out amps that are just too loud and bulky. After swapping out the tubes a couple of times to find what my ears liked, it just perfect. I'm not going to tell anything about how it sounds because that would not mean anything. We all search for a individual sound that is on YOUR head. I will day this. The amp is a great platform to mold into that sound we all are looking. I purchased 2 of the single 12" cabs. O opted to do this instead of the 2 x 12" because I wanted to keep the weight down for moving it around. The 18 watts is plenty loud enough to cut through and be heard. I like the amp so much that I use it for every show. I can play small to large gigs with no worries. When we play bigger events I just run into the board but still use the cabs for monitors. So I can hear my rig. The days of having to lug a full 100 watt stack are not needed anymore. So all in all this a great little amp and it will satisfy most everyone with a little adjusting. I also love that tube replacement is just plug and play. It will tell you if your tubes need replacing and it's self biasing.worldtrdex

Classic Hughes and Kettner tones in a little monster of an amp! Plugged it into a 12 x 2 cabinet and DAMN! this thing is beautiful to listen to. Clean or over driven, this amp is a pleasure to play guitar on. However when overdriven the nuanced variances between different guitars are not well appreciated. The overdrive is more muddy and less nuanced in my opinion. Comparing different strat styles here with different pick-up combinations. Tele sounds different. Chambered SG style sounded the same as other strat style guitars with humbuckers. Parker and Ibanez S series with infiniti 2 pickups sounded distinctly different. Have not played neodymium pickups on it yet but I'm hoping that will clear up some of the mud.arcticwynd

Compact size Versatile Great for Home music room. Studio Clean Channel pristine quiet Lead Channel with boost very nice Takes pedals well Built in attenuation 1-5-18W FX Loop nice! Sounds great with 8 or 16 ohm speaker Great valuechhl

Two hundred is about your bottom dollar for a tube guitar amp. This is a real deal 2 large bottle push-pull guitar head. Not only that, it's two channel with a lead boost. The amp actually looks better in person than the white washed stock photo. Solid value.nbrothergtr

The book covers a lot of areas in different ways, which I like because it helps me absorb the information. I like reading about the evolution of different Amps and the practical side that a technician will appreciate. There are always intangibles when it comes to sound and I like the way the author gives a place to that dimension of interpreting values regarding the different aspects of the amps he is writing about. I am a harmonica player and was slightly disappointed that there is no mention of modifications that would specifically pertain to amps designed for that purpose. Other than that I love the detail and scope of the book and would highly recommend it to anyone interested in tube amps.sydrea48

Received well, good packaging, good print. Book itself it is really good, lots of useful information, a must read for people interested on the subject.corpusterrae