May 07, 2016 my cary cd player 303300 uses two 12au7 tubes. Double triode quick reference data anode current ia11,5ma transcoductance s3,1mav amplification 16,5 heating heating is indirect by ac or dc, with serial or parallel supply. There are many equivalent tubes with different names, some. Everything you need to know about 12ax7 tubes tubes for amps. Overall in great shape considering the age of the pedal. Used bk butler tube works tube driver, vintage tube overdrive pedal from the 1980s. If in doubt, check with your amp or preamp manufacturer to see if this tube will work ok in your application. The eh 12au7 replaced the v3 reverb driver 12at7 in my blackface super reverb with hammond tank. Bk butler tube driver page 1 joes guitars, amps and. Tube rolling 12au75814 family tubes talkin tubes the. Also popular for hifi applications that want the lowest noise possible. Bk butler tube driver 12au7 tube rolling the gear page.
Il bk tube driver e costruito in origine con una valvola 12ax7 che nel caso di david viene. At some point butler started using a toroid transformer that runs from 120240vac which works with either mains power. I have a cheap electroharmonix 12au7 in my 5 knob real tube that. I have a cayin ha1a and which uses 12ax7, 12au7 and two el84. The amperex 12au7 is a nos 12au7 that is made in usa. It features controls for out level, eq sometimes split into high and low eq, and tube drive level. Bk butler tube driver txba gear index texas blues alley. You might ask rogue about using 5814, 6189 and possibly 5963 tubes.
Designed by bk butler, the pedal has seen many labels and owners over the years. Tube driver original by bk butler with bias control. Absolute sound quality of a tube itself isnt critical in this position so expensive nos isnt a must, its just a matter of degree of drive gain, how that makes the reverb tank sound both tonally and in terms of sproingyness, and how it affects the useful setting range of the reverb control knob. This pedal is legendary, used by eric johnson, kenny wayne. The a designation is more for application purposes, designed to be used in a series heater circuit of tvs, radios and other older electronics. Nothing wrong with starved plate pedals i agree, but id tread lightly on the nos, and also wonder why most people especially the pros who use them dont share the designers vision butler with a 12ax7. The 12au7 and its variants are a miniature ninepin b9a base mediumgain dual triode vacuum tube. However, this is one of those experiences where your mileage may vary. Difference between 12au7 and 12au7a audiogon discussion. Tubes such as 12av7, 12au7, 12at7 are siblings of pincompatible tubes with differing gains. This tube tested extremely low in noise and microphonics across the board, so we do not have any driver grade. As well, this tubes low gain make it a great choice for tube preamps in hifi stereo systems. I had a mid90s 3knob tube driver with a yugo 12ax7 and it sounded great. The 5963 has a max plate voltage of 250v while 12au7 has a max of 330v.
I have also tried 12at7 tubes in the 911 and did not hear a big difference vs the 12ax7. Hi andrea, i have the bk butler tube driver with bias mod as well, i use a nos yugo real tube tho 12ax7. And a great database for all who play the guitar and seriously. Due to the fact that my tube drivers are oneoff limited production items, i do not offer a return policy. Difference between 12au7 and 12au7a audiogon discussion forum.
Butler tube driver with bias pot very handy, even the baby 9v. Im also curious about tungstram ecc82s, but stopped buying tubes quite some time ago. Substitutes are given as a guide only please refer to original manufacturers data sheets to ensure that a substitute is safe and appropriate for your application. I run 12au7 s in all of them except the baby, they just sound smoother throughout the gain knob. This is a premium version of the 12au7 made only by cbshytron. Since this tube has a much higher gm and mu factor than a 12au7, the gain is going to be greater and this tube will give a more forward presentation. For the bias control my favorite settings are maximum for gilmour tones and 10 notches below maximum for my original tones, which is roughly 2. There are many equivalent tubes with different names, some identical, some designed for. It can be a little harsh and raspy and i assume that is because i still have a 12ax7 in it. I definitely need to try a 12at7 or a 12au7 in mine. One of the most commonly found driver tubes found in pushpull tube audio power amplifiers is the 12au7 tube. This 12au7 is a favorite amongst our customers and sold in greenyellow amperex boxes. The only other problem i have had is getting it to cut through in a band situation. The 2006 bk model is delivered with a 12ax7 tube which is a bit too aggressive.
For a year plus ive been very happy with a matched pair of cbshytron 5814a tubes. These tubes are quiet, they sound great, and are dependable. Im not really sure what the tube is doing but i know from putting a 12au7 in mine that the gain didnt really change much at all. The tube driver doesnt really use the tubes for gain. Its kind of like having a section of your amp right in a pedal. The tube driver houses a preamp tube and it generates distortion by overdriving the tube rather than conventional pedal methods. These pedals have to be dialed in for each individual amp and guitar combination as they are relatively low output and the tube drive tends to kick in at a lower level than some pedals. I am on again off again with my bk butler tube driver wbias mod. Eirc electronic tubes factory data sheet 12bh7 page 1 of 4 telephone.
Butler has been making since 2005 could be ordered with either voltage, so be sure you are buying a tube driver with the correct voltage for your country. The distortion on my first td was a bit too rough at low drive settings for my taste, so i swapped out several different 12au7 tubes. Buffalo fx has boldly tackled the tube driver the overdrive that has defined the tone of david gilmour and eric johnson for the past decades. The 5814a is a militaryindustrial grade 12au7 with low noise and highreliability spec. I tried 12ax7s in this pedal including the coveted ei prewar yugo 12ax7 as well as 12at7s, but i prefer 12au7s for their lower gain and clarity.
The 12au7 driver valves should be selected to insure both triodes in each 12au7 are identical by having the same quiescent dc voltage at the anodes, 180v dc approx. I found this one at guitar resurrection in austin texas. Bk butler tube driver page 1 joes guitars, amps and gear. I rolled a number of tubes from the 12au7 family in this unit. I got my butler for tube driver is a real handselected 12ax7 tube by bk butler himself. The 5963 tolerates less plate voltage than a 12au7, so its not a direct sub in all circuits. The chandler tube driver is an overdrive pedal most famously used by eric johnson, david gilmour, billy gibbons and joe satriani. If in doubt, check with your amp or preamp manufacturer.
Butler tube driver real tube overdrive effects database. Compatible with all electric guitars and amplifiers. Text in other languages may differ dimensions whd incl. Able to organically create the tone of a tube amp at the point of breakup, the tube driver has been loved by guitarists since its inception decades ago for that allnatural tone and feel. For the last few days ive rolled in matched pairs of. It is unmarked, other than bk written on it with a sharpie.
As well, this tube s low gain make it a great choice for tube preamps in hifi stereo systems. Jun 22, 2006 originally posted by ferbose i have a cayin ha1a and which uses 12ax7, 12au7 and two el84. Then i swapped out that tube with a 12au7 and it went from great to incredible. This pedal is legendary, used by eric johnson, kenny wayne shepherd, david gilmour, and many. Featuring a diehard metal chassis, intuitive control interface, and highlow eq control, the tube works tube driver overdrive captures magic in a box. Due to the combination of low gridplate capacitance and medium gain, it is suited for use in audio voltage amplifier with an extended frequency range.
The stock tube that ships with the 911 tube driver made since 2006 is a golden dragon 12ax7 a low noise, hifi preamp tube. What other items do customers buy after viewing this item. The a is a slightly more rugged construction which results in lower output microphonics. Today, were going to swap the stock 12ax7 in the b. The core of the pedal is a handselected 12ax7 tube which gives you a lovely sort of fuzzdrive sound than can sound amazingly smooth and. Tube 12au6 or rohre 12au6 id1069, vacuum pentode, miniatur7pinbase b7g, usa 1940 and rfifstage shown. Mullard 12au7 ecc82 current production russian reissue. It belongs to a large family of dual triode vacuum tubes which share the same pinout retma 9a. Nos rca 12au7 are cheap and plentiful, and 12ay7 arent that expensive whether you get new eh or find a nice nos ge. This tube has very low noise characteristics and heavily plated gold pins. The 12au7 is probably the first noval b9a tube ever, registered on october 18, 1946, in the electron tube registration list, followed by the 2c51, registered on november 25, 1946. Unfollow 12au7 tube to stop getting updates on your ebay feed. Nov 28, 2009 driver balance the 12au7 driver circuit in the right pic has been redrawn and rotated to show the 10k balance adjustment trim pot.