Chandler tube driver 12au7 vs 12at7

On the new tube drivers, both david gilmour and eric johnson use ei. 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. I need to stay within the modest budget of skylabs pricing above for these amps. Chandler tube driver vs tube works 911 discussion in the stomp box started by winny pooh, mar 17, 2006.

This is a little different than the bk butler tube driver im told. A lot of what ive read frowns on a 12at7 in v1, reserving that tube type typically for the reverb slot. In many cases, these tubes are interchangeable and can easily be swapped. A sample of two tube driver an old chandler with mullard ecc81 vs a new b. May 07, 2016 my cary cd player 303300 uses two 12au7 tubes. For a year plus ive been very happy with a matched pair of cbshytron 5814a tubes. Thats the cool thing about these, you can easily modify them. All 12at7 ecc81 6201 cv4024 12au7 ecc82 cv4003 5814 12ax7 ecc83 cv4004 5751 6922 6dj8 7308 pcc88 6sl7. Compared to the earlier mullard with the folded plate these consistently last longer, have.

Im writing to let you know that i have received the psvane 12au7t grade a tubes. It belongs to a large family of dual triode vacuum tubes which share the same pinout eia 9a, including in particular the very commonly used lowmu 12au7 and highmu 12ax7. Tube 12at7 or rohre 12at7 id3539, double triode, noval, b9a and vhf shown. This vacuum tube retainer for small 12ax7, 12at7 and 12au7 tubes is only necessary if tubes are mounted where vibration may cause them to work out of the socket, but if needed do provide a hold down for loose stabbed sockets. Tube depot carries a selection of 12au7 ecc82 cv4003 5814a pre amp vacuum tubes. I am interested in trying some tube rolling and have been looking at au7 and ax7. What is the tube it is supposed to use according to the schematic. We also offer low noise option to eliminate potential issues. This is the most popular and sought after 12at7 ever. I rolled a number of tubes from the 12au7 family in this unit. The 2006 bk model is delivered with a 12ax7 tube which is a bit too.

It features controls for out level, eq sometimes split into high and low eq, and tube drive level. The a is a slightly more rugged construction which results in lower output microphonics. Vintage chandler rack tube driver 12ax7 overdrive rackmount. Heart of the tube driver is a real handselected 12ax7 tube by bk butler himself. Will these work can you replace a 12ay7 or 12au7 with a 12ax7 and will they be good replacements for the stock tubes. For use in the phase inverter position, we recommend the triode matched option. The 12au7, being a slightly lower gain tube than the 12ax7, was slightly smoother and cleaner sounding at low drive settings in my old bkbchandler tds, but. This is a suitable replacement for any 5847404a tube type. The 12ax7 is by far the best known preamp tube among guitar players. The chandler tube driver is an overdrive pedal most famously used by eric johnson, david gilmour, billy gibbons and joe satriani.

I also need one 5z4p and two 12at7s for a dared sl 2000a pre amp. My siding with the 6sn7 tube over the 12au7 is actually based on the air and ambiance, and complete lack of noise i have received from good octal tube preamps. These tubes are dual triodes actually two tubes in one. The a designation is more for application purposes, designed to be used in a series heater circuit of tvs, radios and other older electronics. These are great as far as they go, but they dont provide dirt from the output section of a tube amp the ot and speakers. The added micro tube audio preamp stage is visible near the wafer style power switch. Test of a fender hot rod deluxe with different driver tubes v3. 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. I would take an e88cc or 6sn7 way before any 12au7. Below are most of the commonly known variations of the 12at7. I love and appreciate tube based audio gear and own sixteen pieces of tube gear between my two reference systems. This tube has very low noise characteristics and heavily plated gold pins. The tuning cap for the notch filter was salvaged from a transistor radio.

I need two 12au7s, two 12ax7s, and four 6l6s for two dared vp20 mono blocks. Tube rolling 12au75814 family tubes talkin tubes the. This tube has a specially designed cathode which can withstand long periods of time in cutoff without hurting the tube. Davids 80s chandlerbutler and the current bk buter tube driver, and. This is a premium version of the 12au7 made only by cbshytron. What tubes would you suggest for upgrading the ones on this unit. Butler with siemens ecc82 mjt stratocaster with lollar. You might or might not want to know that the tube driver uses an op amp solid state integrated circuit to create its distortion sound, and the tube is used after the distortion. Tube driver bias with yugoslavia 12ax7 and tube driver chandler sylvania jan 12au7. Testing 12ax7 vs 12au7a preamp tube in marshall jcm 2000 dsl 50. Bk butlers original hand made tube driver guitar pedal used by eric. The 12at7 is a high mu multipurpose double triode in a 9 pin miniature package. Super popular for vtl, manley, atmasphere, and others. There are many equivalent tubes with different names, some identical, some designed for ruggedness, long life, or other.

The 12au7 and its variants are a miniature ninepin b9a base mediumgain dual triode vacuum tube. It comes stock with a 12ay7 for the preamp tube and 12au7 for the output driver tube. 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. The e88cc specs looked more linear and the tube sounds more linear. We will take a look at why you might, or might not want to swap out the different types of tubes.

Compatible with all electric guitars and amplifiers. Jun 22, 2006 originally posted by ferbose i have a cayin ha1a and which uses 12ax7, 12au7 and two el84. Any experience with an original bk butler tube driver. Originally posted by ferbose i have a cayin ha1a and which uses 12ax7, 12au7 and two el84. Heart of the tube driver is a real handselected 12ax7 tube by bk butler himself controls. Dual 12au7 regen radio the morning light broadcast. Apr 27, 2017 testing 12ax7 vs 12au7a preamp tube in marshall jcm 2000 dsl 50. The chandler tube driver in davidas rig from 19932006 has a slightly warmer tone than the new bk butler model in davidas rig from 2006. Butler tube driver the core circuit design on the 2000s reissue 911 tube driver is similar to the original 198587 versions, but there were several component value changes across the circuit that affect the way it sounds, as well as different pots. The tube driver doesnt really use the tubes for gain. What other items do customers buy after viewing this item. I have both a 80s bk garage made tubedriver and his latest reissue. Each side of the tube does a different job in the amp, like two separate tubes. The tii series 12au7 remain the same as the tseries except the packaging changes.

My favorite tubes and their substitutes by robert h. My attempts to put it in the input stages of an amp resulted anda significantlya shrunken sound stage and. Pedals with separate ac power supplies or wall warts are not original and do. Mullard cv402412at7 these are in royal air force boxes, made in great britain, and are wonderful. For the last few days ive rolled in matched pairs of. This tube is essentially two 6c4s or two ec90s in the same envelope. Jan, 2017 yes, had all 3 bk butler, chandler, and the dm overlord. For reverb driver, we recommend smaller plate 12at7 such as electroharmonix 12at7ehwc.

This schematic is for the chandler wall mart version the one that doesnt. Chandler tube driver vs tube works 911 telecaster guitar forum. I definitely had higher gain and didnt have to turn the volume knob up on my preamp as i did when i had the 12au7 tubes. The 12dw7 has two different sides, one with a gain factor of 100 like a 12ax7, and one with a low gain factor of about 20, like a 12au7. Steve, could you tell us your ranking of the 12au7s. Can be combined with silicon rings to reduce vibration noises. Psvane 12au7t grade a vs nos telefunken 12au7 psvane. The distortion on my first td was a bit too rough at low drive settings for my taste, so i. The core of the pedal is a handselected 12ax7 tube which gives you a. The 5963 has a max plate voltage of 250v while 12au7 has a max of 330v.

Apr 12, 2012 if you put 12at7 in voltage amplification stage of your amp, you willa definitelya here a difference, but the tube has not been designed to be used this way thus, dont do it. I replaced the 12ax7 with a 12at7 and had a good time. The amperex 12au7 is a nos 12au7 that is made in usa. Bk butler tube driver 5knob demo original bias mod vs diy bias. Reverb drivers dissipate lots of power and wear out faster, so we recommend carrying spare as well. The 12ax7, 12at7, and 12au7 all belong to the same family of nine contact, twin triode tubes.

These are all pin compatable with one another, the only differences being the gain factor of each tube. Nov 08, 2012 im writing to let you know that i have received the psvane 12au7t grade a tubes. Hi there, ive now listened and analyzed countless 12au7s and its equivalents and thought id give my opinion on my current favorites. Without a thorough knowledge of tube types and their substitution possibilities, you may be overpaying for your new or. 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. It belongs to a large family of dual triode vacuum tubes which share the same pinout retma 9a. I pulled the yugo 12ax7 and installed a 1962 blackburn mullard 12au7,now. The sound also was a little more forward but i had a little more detail. And, from my limited experience with the moondogs, it is more linear. This 12au7 is a favorite amongst our customers and sold in greenyellow amperex boxes. I believe by now, a lot of people know that the psvane ttubes are good. Difference between 12au7 and 12au7a audiogon discussion. Obviously a lot more can be said about the effect each tube type has on tone but the best thing to do is have a listen for yourself and make your own determination on what type you prefer in your amp.

Each tube wrapped with a cardboard inner liner and pin protector. From united statescustoms services and international tracking provided. By 1985 butler was using chandler industries to distribute the tube driver. I think the 12au7 is most effective in a feedback application, because it isnt linear. Jan 10, 2018 12at7, 12ay7, 12au7 instead of a 12ax7 might tone it down. Going by steves recommendations i need to look for some mullard or rca 12au7 i think i have 1 of these rca. Besides, the bk butler tube driver could be a good pedal to boost a rams head. What is the difference between the 12ax7, 12at7, and 12au7. Its like changing the types of tubes anywhere from a weak 12au7 to a blistering 12at7. But im not sure if any one of your customer have done a direct comparison to a brand new nos tube.

In most tubes, like the 12ax7, the two sides are identical. The bias control allows you to adjust the tube characteristics over a wide range. I currently have os rca black plate 6l6gc with a spare set of nos on hand and i also have 4 good tele 12ax7 on hand. The stock tube that ships with the 911 tube driver made since 2006 is a golden dragon 12ax7 a low noise, hifi preamp tube. Tube driver original by bk butler with bias control. The 12au7, being a slightly lower gain tube than the 12ax7, was slightly smoother and cleaner sounding at low drive settings in my old bkb chandler tds, but there was a less noticable difference in my 911 tube drivers. This schematic is for the chandler wall mart version the one that. I recall the bk butler having heaps of gain too much imo. Ive done the swap of 12at7 in place of 12au7 and with the tube gear i had the difference was pronounced.

The first, original, one was the bk butler chandler tube driver. Double triodes of the 12au7 family have a centertapped filament for use in either 6. Any 12axx tube is made as a 12ax7, then it is tested and rated as to how much gain it creates. As of 2012 update the 12au7 continued to be manufactured in russia, slovakia jj electronic, and china.

The first, original, one was the bk butlerchandler tube driver. It belongs to a large family of dual triode vacuum tubes which share the same pinout eia 9a, including in particular the very commonly used lowmu 12au7 and highmu 12ax7 the 12at7 has somewhat lower voltage gain than the. I have a bk butler tube driver with the bias control. Chandler tube driver vs tube works 911 telecaster guitar. Reviews i read said that the td would sound better smoother less harsh with a 12au7 or 12at7 tube. It is unmarked, other than bk written on it with a sharpie. It was 9v powered, like most pedals, making it more marketable to a larger crowd. Some used 4knob tube drivers marked chandler are not the original design by bk. Im comparing it to a brand new nos telefunken 12au7. Yes, had all 3 bk butler, chandler, and the dm overlord. Hi andrea, i have the bk butler tube driver with bias mod as well, i use a nos yugo real tube tho 12ax7.