How to repairbias a ampeg svt tube amplifier by lee. Ampeg svt power amp schematic with 6550s 1970 joe piazza svt power amp schematic with 6146s 1969 joe piazza. With this amp you have the tone that is equally effective. The earliest svt driver circuits design would on occasion result in blown 6146b tubes. Uad ampeg svt bass amplifier plugin bundle youtube. Transistor 100150 w in memory of 8ohms, 250 w 4ohms. Ampeg svt 810e classic series 8x10 bass speaker cabinet. The original amp came on the market back in 1974 and featured the same preamp as the ampeg svt, but introduced a 100 watt power amp, all tube construction and matching 1x12, 2x12, and 8x10 cabinets.
The head has ridden around and been in car accidents and just abused. That will balance the signal feed to each side of the output section. Heres some info and a modification on a new ampeg that i purchased in december of 2007, an ampeg svt vr. Thats because they have to the lowend tones of the bass need serious amplification to punch through the rest of the band and achieve the perfect impact on the audience. The svt cl is arguably one of the most popular bass heads ever, with users ranging from pfunk to kiss and all points in between. Ultra accurate modeling of the most soughtafter ampeg gear, with unique dsm technology, powered by amplitube. Of course, to make that happen you know you need a kill bass amp that can really deliver the boom every time you plug in. The new ampeg svtvr is a vintage reissue of an early 1970s blueline svt head. This dynamically powerful bass amp delivers a thunderous 300 watts of unsurpassed quality, reliability and tonal flexibility, offering the classic vibrance of tubes as well as contemporary features. Ampeg classic series svtvr 300w bass head reissue reverb.
Svt ass uiar plifier 4 introduction the harmonically rich sound and legendary performance of the classic ampeg svt are redefined in the svt cl. The ampeg has an all tube preamp and a heavy ss power amp, a hybrid amp. We have a huge schematics inventory, projects section and forum. Save money on used ampeg bass amplifiers at guitar center. I bit the bullet and had one roadcased and shipped by sea. The svt3pros frequency control allows you to select the center fre read more. My version of the rack mount svt preamp differs from ampeg s in the following ways. The ci does not post on its output eq di, have a head of the award depend on the preamp to the console seems too risky, i want my sound in my back and in the face. One of the most soughtafter bass tones of all time. You are now the proud owner of an ampeg svtvr bass guitar amplifier. For additional information about ampeg amps see his website. This video has lee jackson showing you how to to service and repair your own ampeg svt amp, and to keep it healthy and running correctly. Ampeg is a place where you can submit, browse, vote and comment on ideas to make ampeg better.
Protect your precious bass amp head with the ampeg svt cl vr cover. Rated to handle 300w rms at 8ohms, the svt 112av is a great match with the v4b, pf350, micro vr or for integrating with other ampeg cabs in your rig. It is possible to change the sound of the amplifier by changing the type of preamp andor driver tubes. Save money on used ampeg amplifiers at guitar center. B12xt amp schematic 1967 ampeg sb12 amp schematic with 6l6gcs joe piazza sb12 amp schematic with 7868s. Since then, the svt has become the bass amp that all rock bassists dream of, whether theyre famous or completely unknown. Ampeg has modified the svt concept for a wider variety of sounds, but fortunately, they still make the svt vr, which are virtually identical to the ones the stones used to put their jack daniels bottles on top of. Plugin alliance ampeg svtvr bass amp plugin the definitive guide. Find great deals on ebay for ampeg svt 3 pro and ampeg svt 4 pro. The ampeg classic series svt vr is a 300watt tube bass amplifier head, a reissue of the classic blueline svt amplifier from 1969.
A friend had an mti svt with the japanese transformers and while they sound ok, the magnavox ones sound better. Ampeg svt vr replacement head cabinet, blue line, sparkle grill. The proven expert of bass amplification, the original alltube ampeg svt vr bass giant is now available in all major native formats. The idea is to run the amp into a load, apply 40hz sine and turn it up until you measure 25v pp rms. The svtvr amplifier is an ideal companion to the svt 410hlf, svt 610hlf, svt 810av or svt 810e cabinet, available separately. Ampeg classic series svt vr 300w bass head reissue. My live rig i dialed in my setup exactly i couldnt believe it i new it would be close but an exact match. Since 1969, the ampeg svt has been the amp that set the standard for bass amplification. I have been working on some of the svt vr s lately shameless plug sorry, announcement coming soon. Save money on used ampeg bass amplifier heads at guitar center. Both amps sounded good, but significantly different. The preamp stage, power section, and even rocker switches emulate the exact signal path, tone, and vibe of the original. And noise violations are really just a badge of honor, right. The svtvr amplifier is an ideal companion to the svt410hlf, svt610hlf, svt810av.
The vr is just above the extremely cl which has fewer pro warm months than its big sister. The big differences between the 2cl and the vr vintage amps is the master volume. In the working, take a few minutes to troubleshoot it before you call for service. However, when they have problems they can be a pig to work on. Ampeg svt micro stack 200watt amplifiercabinet combo at a glance. Ampeg svt micro vr stack svt micro head and svt210av.
Create, record and perform with guitar in new ways. Hear how the ampeg svtvr bass amplifier plugin for uad2 and ua. Svt power amp schematic with 6550s ampeg svt power amp schematic with 6550s 1970 joe piazza. The svt vr sports two channels across four inputs two normal, two bright with 3band eq on channel one and simpler 2band eq on channel two. Jan 28, 2015 the ampeg svt vr is a vintage reissue of an early 1970s blueline svt head. You get the 200watt svt micro vr head driving the svt 210avs pair of 10 eminence speakers. This rugged and padded cover keeps you head free from dust and dirt while it is being stored or between gigs. When you first picked up your bass guitar, theres no doubt that you had big dreams of making the low end rumble. To view this site, you must enable javascript or upgrade to a. Prowess amplifiers offers resources for the guitar tube amplifier builder. At 85 lb 39 kg, the ampeg svt provided 300 watts of rms power, considerably more than most other bass amplifiers of the era.
Ampeg 70301 50k frequency pot for svt3pro, svt4pro, and svt350h 50k frequency potentiometer for these ampeg bass head amplifiers. The ampeg svt is a bass guitar amplifier designed by bill hughes and roger cox for ampeg and introduced in 1969. Ampeg sb12 portaflex amp schematic ampeg schematics. The choice between vr and the venerable svt svt cl me was easy.
With up to 450 watts and the sweet sound of tubes, the svt3pro is the top choice of rockers and funkmeisters around the globe. Add to that how deep the 410hlf is tuned and you end up with impressive lowend, but you lose the signature ampeg midrange hammer blow. Like all ampeg products, your svt vr amplifier is designed by musicians and built using only the best of components. This versatile and powerful bass amplifier delivers up to 300 watts of unsurpassed quality, offering the classic vibrance of tubes, as well as contemporary features. Reverb is the marketplace for musicians to buy and sell used, vintage, and new music gear online. The preamp stage, power section, and even rocker switches emulate the exact signal path, tone, and vibe of the original rock n roll workhorse. The svt is a standalone amplifier or head as opposed to a combo unit comprising amp and speakers in one cabinet, and was capable of 300 watts output at a time when most amplifiers could not exceed 100 watts output, making the svt an important amp for bands playing music. What i need is a schematic that list the values for the pots some are stacked but i think all those are ok. Aug 10, 2015 in this video james takes a look at the new brainworx bass amp simulator the ampeg svt vr for the uad2 platform. Svt ass uiar plifier 4 introduction the harmonically rich sound and legendary performance of the classic ampeg svt are redefined in the svtcl. The svt vr amplifier is an ideal companion to the svt 410hlf, svt 610hlf, svt 810av or svt 810e cabinet, available separately.
Review of ampeg svtvr bass amp simulator for uad2 by. There are a few potentiometers that are broken yes physically broken. For situations where you need svt sound without svt volume or girth, the ampeg svt micro stack is a perfect choice. Ampeg diagrams, schematics and service manuals download for free. Ampeg heaven amp schematics schematic amplifier echotwin. Like all ampeg products, your svtvr amplifier is designed by musicians and built using only the best of components.
The last guitar rock album i personally put out used a combination of tube amps, modeling software, and the katana, and i doubt if people could tell the difference. Brainworx and plugin alliance are thrilled to present the native plugin version of ampeg s seminal v4b 100w alltube bass amp. For the rest of us, there is the ampeg microcl stack, delivering 100 watts of ampeg tone into any situation. There are hundreds of pages of tube amp information on my library page. I use the cabinet with a very early mti svt from about 81 which stock uses the magnavox transformers instead of the japanese ones, although it has japanese components in it still. An introduction to your new ampeg svtvr bass amplifier.
The combination of two plate resistors were reading about 12 ohms instead of 20 as the schematic indicated because the plate equalizing resistors were all 5. Know your ampeg bass amps the history of 3 iconic ampegs. Get support visit uad forum download uad software my account. While we waited we designed and put together a straightback 6x10 based on his original ampeg 69 straight back 8x10. Each amplifier is tested to confirm that it meets our. The svt ii amplifier ok, as i said in the introductory text, the svt is a good and powerful bassampwhen it is working correctly.
Connect the equipment into an outlet on a circuit different. You are the type who would happily crank up a full ampeg svt stack in your living room. Svt vr service information service information if you are having a problem with your svt vr, you can go to our website. Add a tuner and separate directamped signal path for a complete software bass rig. He talks you around the gui and plays some of the presets. The older nonpro from the 80searly 90s gets more love from svt fans because its closer in design to the first channel of the original svt with just an added master and graphic eq. Svtvr service information service information if you are having a problem with your svtvr, you can go to our website. The high power rating made the svt a candidate for use in larger venues. Over 20 bass gear emulations, including classic ampeg bass amp models like the svt classic, b15r portaflex flip top, ba500 and svt 4pro. Ampeg svt3 pro 450watt rackmount bass amp head reverb. Repairing and checking out the modern day ampeg svt sporting 6 x 6550 in the output. The proven expert of bass amplification, the original alltube ampeg svtvr bass giant, is now available in all major native and aax. While it is not an exact duplicate of the original svt, the circuit is basically the same, and this amp actually sounds identical to my other two vintage original svt s a 69 and a 75. Many of the above schematics are courtesy of joe piazzas backstage.
Click the link above for tube amp info, schematics, board building information, projects, mods, transformer diagrams, photos, sound clips. As long as the bass guitar has been a part of the music scene, bassists have been demanding a lot out of their amplifiers. Ampeg bass amps are so universally revered, its hard to imagine a time when they. Ampeg amp schematics to assist you with your amplifier repairs and modifications. The svt saw widespread use by rock acts in the 1970s and is still considered by many to be the world standard reference bass amp. Developed by brainworx, the ampeg svt vr and svt 3 pro bass amplifier plugins offers two flavors of the legendary svt recipe exclusively for uad2. The ampeg svt is a bass guitar amplifier designed by bill hughes and roger cox for ampeg. We highly recommend replacing the driver tubes as well.
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