I just put some groove tubes el34ms in my yjm100 today and man do they sound good. Egroove tubes re issue super premium mesa select groove tubes 25 % discount mesa select for use in mesa boogies. Mark ewing the gt66 is a chunky microphone with a matt nickel finish it weighs about 530g and measures 47mm in diameter and 190mm in length. This is the best tone yet from an amp that is already my all time favorite amp.
Wtf, if i dont like it i can always sell it for the same or if not, only lose maybe a few bucks on it. Its always nervous working for other people but it was a good challenge and test. Groove tubes audio seii rackmount speaker emulator, reactive load, linelevel out, 150 watts max input, parallel fx loop. The good news, is that once this is done, you should be able to replace your power tubes with groove tubes of the same type and rating without bias adjustment. These files are related to groovetubes gt 55 microphone. I know the thing drives a 6205 tube and havent done any math yet but about how much do you think the voltages should be. Groove tubes gt6l6ge pentode this is our flagship gt tube, the one we spent nearly 4 years developing from scratch after purchasing the original general electric design, the original rca grid winding machines that made this tube, and tons of the original materials. The capsule is groove tubes exclusive 32mm disk resonator design, in a singlesided implementation the rear diaphragm was not sputtered. Groove tubes substitubes allow the replacement of octal type preamp tubes with the more common and higher quality 9pin miniatures by properly mating a female 9pin socket to an 8pin plug. The flagship of the gt 6l6 line, it looks and sounds exactly like the original g. Groove tubes gt6l6chp pentode our most recent release of a totally redesigned 6l6c featuring addition of pure nickel carborized black plate construction, this is the same material used on the classic rca black plate versions of the 50s.
Groove tubes gt6v6r medium power amplifier tube, matched. This tube was originally intended to be produced here. These are chinese mullard dual getter copies that groove tubes fender makes. Egroove tubes re issue super premium groove tubes 25 % discount groove tubes super premium valves are specially burst tested by us. If so, you should have a qualified service tech rebias your amp for the new tubes. The 5sc is the companys first tubeless mic, but it uses the same basic capsule construction and delivers more of a wartsandall, tellitlikeitis kind of a sound. The groove tubes gt6l6r power tubes duet gives you what may just be the most reliable of the currently made tubes, with slightly less power and a more aggressive edge when pushed into distortion. Selling a beautiful groove tubes model 3 tube large condenser multi pattern mic. Groove tubes gt67 multipattern tube condenser microphone. The gt66 is a largediaphragm tube condenser, with a fixed cardioid polar pattern.
The model 3 was the top of the line mic designed by groove tubes owner aspen pittman, manufactured when gt was still a small califo. New groove tubespremium preamp tubes12ax7 gtecc83sthese do not come in the original boxesi have 5 of these which are all brand new and taken out of 2 brand new fender blues deluxe reissues one of my birthday gifts this year was 6 nos rca tubes from the 60s and so i pulled th. Groove tubes model 1bnovember 2002groove tubes model. Thank you for your purchase of a highquality groove tubes microphone. The flat black gt55, the solid state version of the gt66, is a true class a condenser microphone equipped with a 1. It was for several years the flagship microphone in the groove tubes line. I was told by guitar center that the sterling audio st66 condenser mic is equivalent to the groove tubes gt66 and that the mics are made by the same mfr aspen pittman. Russian made, these tubes are the same as stock 5881 power tubes, but theyre specially matched by groove tubes, resulting in a better sound and. Groove tubes highestoutput 6550 is slightly easier to push into distortion than the original g. Regardless of what is happening above 14khz, this capsule suffers from a significant and. The power rating on my new tubes are 4 and they are biased at 38 ma. The new gt home has close to 12,000 feet of office, lab, and manufacturing space and is located in the small town of san fernando, california.
It used a subminiature gt6205m tube, which we believe was a pentode, wired as a triode in a class a circuit. Valves audco cast stainless steel gate, globe check valves emico. As a pillar of the british amp invasion in the 60s and 70s, hiwatt stands alone with a handful of guitar amplifiers that were there at the beginning. See more groove tubes legacy mic owners manuals gt44 owners manual. Groove tubes 1 premium 12ax7 gtecc83s 2016 clear reverb. Groove tubes gt6l6r russian power tubes medium duet. Despite substantial efforts to optimize the overexpression and purification of aftd in e. The groove tubes st55 is a largediaphragm fet condenser with a. View and download groove tubes gt5751m specifications online. Groove tubes gt66 noise repair my buddy amos at marshall sound studios handed me a couple cranky mics to attempt to soothe, see what i can do. The mic was exhibiting a seashore type of windy, fluttery noise after being powered on for an hour or so. I have a blue dragonfly and i love it on certain things. A faithful reproduction of the original general electric clear top tube made on the original ge machines and with many original materials.
Outside of the usa, maudio also distributes the model 55 and model 56. Groove tubes gt66 large diaphragm cardioid tube condenser. The gt67 is a multipattern tube condenser essentially, a multipattern version of the gt66 cardioid tube condenser. Aftd was successfully incorporated into lipidfilled nanodiscs after a twostep. Groove tubes was started in the late 1970s by aspen pittman, who had a lifelong fascination with tubes and tube tone. Im a vocalist looking for that right mic for my tenor voicei found it in the gt model 1btube mic i brought it to a friends studio and tested it against the baby bottle, 4033, tlm 103, and rhode ntk. Over the last four decades lt and its associate company audco india ltd has expanded manufacturing range of valves including special valves for power. After all, compare the dimensions of, say, the excellent modular api. Thank you for your purchase of a highquality groove tubes. These groove tubes gold series gt6l6r matched power tubes are russian made, same as the 5881, but matched in the gt system. Our perfect pair power tubes are matched as closely as anyone in the tube industry and have the most accurate, biasfree operation of any tube numbering system, including groove tubes. Further improving the design, we added gts exclusive heat sink wings to the plate assembly. Groove tubes started in southern california, and through innovative design, rigorous selection and testing, gtpowered amps have rocked the world in some of. The groove tubes line of microphones is exclusively distributed worldwide by maudio formerly midiman, with the only exception being the model 55 and model 66 that are sold exclusively through guitar center stores in the usa market.
The two gl6 tubes were old and not even the same brand so i replaced them with a pair of matched groove tube gt6lbr medium duet amplifier tubes. Groove tubes versatile mics offer a range of facilities to suit every budget. Webbased molecular graphics for large complexes article in bioinformatics 3421 may 2018 with 108 reads how we measure reads. This fascination led to aspen and a team of technical experts to reevaluate the way tubes were tested and matched. Gt66 tube condenser microphone gt66 specifications preamp topology low noise tube based class a design tube type seleted lownoise gt6205musa polar pattern fixed cardioid high pass filter switchable 75hz,12dboctave attenuation pad switchable 10db frequency response 20hz 20khz equivalent noise 23db spl a. Both are outstanding imho and easily hold there own against an ntk which is about equal in sound quality i think. Sterling audio st66 condenser mic groove tubes gt66. Both these mics are good performers, but in slightly different ways, and the tube driven 6tm sounds pretty much as youd expect from groove tubes, with a lively, warm character. Nos ge 6l6 power tubes are one of the more sought after, and gts reproductions of these sound pretty darn good. Most amp manufacturers bias their amps for tubes in the medium range and replacement of stock tubes frequently do not require rebiasing if mediums are purchased.
Groove tubes bought its present building in august of 2000. The groove tubes gt66 valve mic with its psm1 power supply. These are a very sturdy and reliable tube, with slightly less power and a more aggressive edge when pushed into distortion. For the t8455 circuit, follow the instructions in the manual to solder the. Good for bass amps and metal, when more pronounced note definition is desired with just a touch of distortion. Groove tubes gt66 cardioid tube studio condenser microphone w. The groove tubes gt6l6ge is a faithful reproduction of the original clear top 6l6. Presuming the groove tubes 6l6ge is in fact a longerlife tube as it should be, that should make up for the difference in price if youre looking at it versus say the svetlana. Groove tubes gt6550r medium power amplifier tube, matched. Discussion in the workbench started by hawkesman, feb 4, 2014. Unfollow groove tubes gt66 to stop getting updates on your ebay feed. We hope youll agree with us that its better not to pay extra for rebranded tubes and that it also makes more sense to know exactly what tube youre buying. Here is the link to the musicains friend listing for the sterling audio st66. I have an opportunity to pick up a bluebird very cheap.
Groove tubes gt 66 tube studio condencer mic thanks. Myles, i was reading some info about gts on your website earlier, but now im confused. These files are related to user manual for groove tubes gt57. Now, groove tubes are the mostused tubes in guitar amps and a favorite of tone aficionados. Top of the new line is the gt66, a cardioid, sideaddress design with. Groove tubes gt67 pinoutpsu specs i bought one a while back without a psu and, if i cant buy a replacement, am hoping to modify an existing one to get the job done.
Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer. Never attempt to change the tube on the gt 44, gt66 or gt67 or. Schematics aspen and associates aspen and associates. The groove tubes 6l6c are a remake of the chinese 6l6 that has a shimmery and articulate sound that is not too compressed. Feb 23, 2003 i was just up at the groove tubes corporate officesproduction center this past week and picked up a mic to demo. Aspen and associates schematics aspen and associates. Groove tubes power tubes are matched and rated in low, medium and high output levels. Groove tubes gold series gt6l6r matched power tubes medium. I would not choose an ntk over a 6667 unless the source called for it.
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