Tungsol 12ax7 is one of the top choices for upgrading stock 12ax7 tubes in both audio and guitar amps. Very hard to find used by jerry garcia late in his care. Get this book for the extensive collection of schematics and cool amp pictures, ignore the sales pitches and especially the tech info, as much of it is incorrect. Groove tubes guitar amplifiers for sale in stock ebay. The power amp considerations are important since the power tubes affect the overall output in terms of headroom and breakup, but its the preamp that really does most of the tonal shaping of the amp. Many tube amp owners, unaware of the facts, are overly cautious, guarding the heart of the amp the power tubes like a mother hawk watching over her eggs.
Would the preamp with five 12ax7 tubes just be that much better sounding and capable of greater distortion if there is a grind control. Tubes are not as fragile as eggs, but like hatchlings, they do need some tender loving care. Original groove tube trio preamp in very good condition has a few case scratches on it, but thats about it. While there are many different types of preamp tubes, the most common type is the classic 12ax7. At tonal tubes we sell power, preamp, and rectifier tubes for your guitar or hifi amplifiers. Dougs tubes vacuum tubes for guitar amps and hifi audio. I would think more tubes would be better but please enlighten me. Identifying speaker or power tube problems so youre band is going on in an hour. It is great to recycle but i kept my tube testers and still working on these. Get the guaranteed lowest prices on groove tubes preamp tubes instruments at musicians friend. In guitar and bass amps, tungsol 12ax7 is well balanced and low microphonics with ample gain.
Pittmans the tube amp book has sold more than 140,000 copies worldwide which is a strong testament on the value of this book. Preamp tubes take the small signal from your pickup and amplify it to line level. Tubes were the first widespread method of controlling electrical signals without moving parts. Ive been experimenting for years working to find the right mix of good sounding and reliable 6l6 tubes to stock here at the shop. There are two fuses in a hidden slot just under the electical plug. Your buddies can take a look in the back of your amp and there wont be any doubt that you are the man. Some of the tube amp designs of the last 60 to 70 years have oozed so much aural and visual mojo that. Sep 01, 2003 this is the best tube amp book i have yet bought so far. Sarris custom tube amps handmade tube amplifiers since 1992. Unfollow tube amplifier kit to stop getting updates on your ebay feed.
An alltube carvin v3, equipped with five 12ax7 preamp and four el34 power tubes. Please see photos for detailscondition and email me with any questions. Groove tubes was started in the late 1970s by aspen pittman, who had a lifelong fascination with tubes and tube tone. Because of this, 12ax7 is found in majority of guitar, audio and recording tube amps. Versatile, affordable, and all the flavor of what we love about marshall, the dsl series is simply one of the bestvalue guitar amp purchases on the market.
Everything you ever wanted to know about output tubes. There is something about the glow of hot glass and the imposing sight of weighty iron through the grille that seems to sum up so much of whats cool about the electric guitar. Groove tubes started in southern california, and through innovative design, rigorous selection and testing, gtpowered amps have rocked the world in some of the most famous rigs ever played from studio to stage. For over 30 years, groove tubes have been trusted and demanded by touring professionals and their techs around the world. Preamp pondering having covered the basics of the power amp, it is time to consider the preamp. Nor, at 280lb in its flight case, is it likely to go walkin. Im trying to change tubes to get a crisper sound on the preamp side and add head room on the power side. The free shipping option allows tubedepot to choose the most appropriate carrier and service.
This is the best tube amp book i have yet bought so far. Get 2% off your entire order with code 2off sign in or create an account. Youre setting up your gear and something is wrong with your ampmaybe. Both the head and combo versions are excellent on nearly every measurable quality marker.
This deluxe revised edition contains 40% new material, with a. This fascination led to aspen and a team of technical experts to reevaluate the way tubes were tested and matched. However, its true, this book is truly a commercial for grovetubes. Books, tutorials, and technology for guitar amplifier circuit design. This web site is the most practical way to introduce a number of guitar tube amp and audio tube amp projects for those who not only like tube amps as musical.
The amps have a reputation for a high consumption tubes, maybe due to a hot bias. It makes possible the performing of operations with precision and amazing in conception, like in the vacuum tube amps for guitar and audio. My top choice had been the winged c but as of late 20, the tube is no longer in production. The use of a 12ay7 in the front end a lowergain tube thats a direct replacement for a 12ax7, which maintains integrity for the next stage, and other things, all contribute to avoiding. Most guitarists are fairly fanatical about the tube amp. In life tests so far, at least a 40% increase could be easily expected. Im plying through a 4 watt amp at practice volumes. Tungsol 12ax7 is not the highest gain tube, but thats what makes it good sounding, with good note separation and lowmids that isnt overwhelming. When its set for distortion, not metal distortion but rock distortion, and you roll back your volume knob, you can get the amp to clean up. Everything you need to know about 12ax7 tubes tubes for amps. Getting the pair moved into my listening room required. The following is a systematic troubleshooting guide for when this happens. Aspen pittman, passed away august 10, 2019 from injuries suffered from an automobile crash in southern california the day before.
Alltube circuits, uses any of 25 output tubes and a variety of preamp tubes without rebiasing, effects loop with blend, classic styling, highquality speakers. You have to give up some of that when you are going with technology that is a old as in a tube amp. These are generally much smaller than power amp tubes and serve the main function of shaping the overall character and tonal characteristics of your guitar sound. Discussion in marshall amps started by htaylor, apr 5, 2012. Although some people refer to them as power tubes, i feel output is far more fitting. They are new and unused with original, unopened boxes. Z, fender, gibson, hiwatt, marshall, matchless, mesaboogie, orange, vox. Aspen pittman has produced various versions of the tube amp book over the years this is the 1991, a 703 page trade paperback weighting in at a little over two pounds. The following guidelines should be taken into account. In the golden days of vacuum tubes, 12ax7 was used for more than just audio signal amplification. Has been recently serviced by a local boutique amp builder, and everything checked out fine. In a way, an amp purchase is a much tougher decision than an electric guitar. The first computers were vacuum tube based and took up rooms while vacuum tubes are considered outdated by. Other amps use 12au7 or 12at7 tubes, which are similar to the 12ax7 but have lower gain.
Reviews for the deluxe and revised edition mention that the image quality on schematics is poor. Circuit simulation a deep dive into spice tube amp modeling. This deluxe revised edition contains 40% new material, with a comprehensive az section covering all the great tube amp manufacturers, with histories, photos and information. Supplier of vacuum tubes for guitar, audio, and recording applications. Already known as the bible of tubes and tube amps, the tube amp book is now even better. With that being said, at least you know what to expect. If your a gt fanboy, then this book is really for you. Im just wondering how many tubes is good to have in a preamp if one was to use a solid state power amp with a tube preamp. Basic theory a 21stcentury approach to understanding preamp, power amp, and power supply design. All tube circuits, uses any of 25 output tubes and a variety of preamp tubes without rebiasing, effects loop with blend, classic styling, highquality speakers. Already known as the bible of tubes and tube amps ethe tube amp booke is now even better. A guide to basic tube amp maintenance guitar world. Backbeat books the tube amp book deluxe revised edition.
Most tube amps need multiple preamp tubes to perform various functions. After installing thousands of tubes, here are my three top picks and why. Due to the higher vacuum of a 6ca7 over a soft vacuum el34, these tubes should have a much longer life in guitar amp usage than an el34. With with a good tube amp, you can typically play the guitar with the volume all the way up, heins said. I recommend this book for anyone repairing tube amps.
338 1227 1514 514 685 179 626 611 557 1191 1373 1216 382 1057 1252 1538 800 37 790 534 1398 666 92 252 21 846 1579 1415 165 413 1263 285 62 1374 373 1142 1296 179 111 107 852