6v6 driver 300b tube

Parallel pushpull 300b mono amplifiers rudolf moers from the netherlands has kindly sent us details of his parallel pushpull 300b monoblock tube amplifiers to share with the diy audio community. A singleended triode set is a vacuum tube electronic amplifier that uses a single triode to. Updated march 18, 2020 ive been experimenting for years working to find the right mix of good sounding and reliable 6v6 tubes to stock here at the shop. Apr 03, 2018 the tube manual specifications are not consistent. Tube 6v6gt or rohre 6v6gt id2989, beam power tube, octal int. This tube is occasionally used as a driver stage in some more elaborate circuits.

Diy 300b singleendedtriode set hifi amplifier project. It is okay, but tends to sound a little mechanical and artificial. To run a beam power or pentode tube in triode mode, strap the screen grid to the plate e. An el84 or 6v6 can pull up to a 470k if you selfbias them but fixed bias tubes need 100k or less. I believe this tube to be more linear than the 6v6 triode wired. The gold lion 6v6gtcv511 tube is the top of the line in current production 6v6 power tubes. Shop the top 25 most popular 300b amplifier at the best prices. They deliver about 2w in triode mode, or, about 5w in pentode mode.

The board features careful routing of high voltage and audio signal, grounding to give the full potential of a wellthought and optimized design. This is another question that comes up quite a bit so lets take a look at it now. Tubes i did a lot of initial listening using the 6aq5, which is a smaller tube with similar electrical characteristics to the larger 6v6. Single ended 42 amplifier sun audio 6v6 for sale us. Two psvane 300b power tubes, one 6sn7 and one 6sl7 small signal tubes, and one 5ar4 rectifier. The 300b is an unusual singleended tube amp with 300b power tubes. Cheap amplifier, buy quality consumer electronics directly from china suppliers. Explain to me the tonal differences between 6v6 and el84 amps. Audiophiles may have their own favorite dual triodes, ranging from exotic european types like the ecc40 to the rugged industrial types like the 5687.

I personally would not paint with a broad brush in regard to vintage tubes. Following the introduction in july 1936 of the 6l6, the potential of the. Needless to say, the 12ax7 is not the ideal drive tube for an output stage. Grid bias for the 300b tubes is generated by a shuntregulated bias supply pcb that i designed.

This information can be quite useful for my friends of the radio. Tubes free delivery possible on eligible purchases. Aquableu your diy highend tube audio, kits, lundahl transformers. Tube complement is 6a6 driver direct replacement of 6n7 42 output tube earlier version of 6v6 without beam plate and 6by5g rectifier.

I didnt include any individual tube bias or balance adjustments, so i am using matched pairs of 300b tubes. These will be highly comparable to the famous 452a3300b triode tube amps at a. After extensive research and engineering, new sensor corp. Classic tube rectifications, dc heated for quiet operations. From german another approach using tube similar to 6em7 or 6bm8 ie, driver and power in one dissimilar tube single ended. We have a large selection of 300b tubes in stock everyday. Complete individualized stages the driver preamp, outputs and rectify power supply stages. The motherlode is a militaryspec ultra high end preamplifier utilizing a separate dual power supply for the lowest. The driver is decoupled with 100 ohms and another 70uf oil cap. Given you already have a d3a about the best driver tube for a 300b amp i can think of in your amp, why not use it. Nov 16, 2015 i totally agree with maynard on his suggestions regarding the original schematic. The 6em7 driver 1950s and mullard rectifier early 1960s tubes in my current 300b set are both vintage and very good. Single ended 42 amplifier sun audio 6v6 for sale us audio. And on the 300b output stage, each tube is fed, ran and cooled by its own circuit board for best separation and.

It was great, iirc it was a 6l6 driving a 300b, but i recall i did enjoy it. What sets single ended tube amps, whether they use very expensive triodes like a 300b or 845 or even a 2a3, or if they use classic pentodes like 6v6, el84, 6l6, 6550, kt88, el34, etc. It is this ability that all high end amplifiers aspire to. If you really want to audition 12at7s use a frequency generator and transducers that function above the range of human hearing. Another tube that i have heard as a driver very nice and have seen used as an output tube for treble is the russian 6e5p triode wired do a web search for romy the cat 6e5p. I linsten to 50% rock, 25% pop, 25% classic or whatever sound good. While neither tube is fantastic when pushed to the limit, the 6v6 is more listenable at that ragged edge than the el84 imho. This is the 300b tube against which all other 300bs are compared. While neither tube is fantastic when pushed to the limit, the 6v6. This is a suitable replacement for any 6v6 6v6g 6v6gt 6v6gta 6v6gty pentode tube type.

Raphaelite sealed transformer 6v6 5842 6c45 drive push. The revenge kr842vhd amplifier lundahl transformers. It should be quite obvious from the photographs that the design and construction of a pair of amplifiers this size is by no means a small undertaking. In my superstereo amp using kt88s, i think i will build the driver stage using a 6v6 per channel as a triode splitload inverter. Best value 300b tube amplifier great deals on 300b tube. Reisong boyuu a50 ii 300b tube amplifier hifi exquis 12at7 6v6 driver lamp singleended amp bya502 boyuu just changed their brand name to reisong, so. But the 6sn7gt is arguably the best generalpurpose audio triode. My previous tube mono blocks used the 6sn7 as drivers and i used vintage syvania and rca.

The el84 stays strong in the mids and highs to the point of harshness when pushed. The first mass produced 300b tube was made by western electric in 1938. Since that time the 300b tube has become possibly the most revered tube in high end hifi audio. Thoughts and opinions of a tube audiosingle driver junkie. In the meantime, the new shuguang we 300b tube is a new option were excited about and worth considering. After installing thousands of tubes, here are my two top picks and why. Each channel makes use of a single low noise tube 12ax76n11 at the input and proceeded by a power tube 6l6el34kt88 to. With 350 v on the plate, and a 74v controlgrid bias, the 300b has an. There seems to still be a lot of nos 6v6gt tubes available which are my favorite as they have a smoother tone to them. In 1936, rca developed the 6l6 beam power tube shown in photo 1. Raphaelite sealed transformer 6v6 5842 6c45 drive push 300b. Raphaelite 7k driver transformer for parallel 6v6 6sn7 push 300b 2a3 tube amp. Other popular beam power tubes include the 6v6, the 6550, the 6bq5el84, the kt66, the kt88, and the kt90.

This is the 300b tube against which all other 300b s are compared. Ii 300b tube amplifier hifi exquis reisong 12at7 6v6 driver lamp. For the 12ax7 i used an old dgetter rca greyplate in lieu of the stock jj jumper it was set to elekitrecommended ultralinear. As can 71a biased at 40v 20ma 180vp with rp about the same, assume the same plate load inductance for both types. Mc300c use two level driver to assuer the 300b sound quality, famous 6n8p6sn72, 12at72 psvanes 300b2, rectifier use chinese 5z3p1, it can be. The input stage also relies on two paralleled triodes ecc88, which drive the 300bs through a stepup transformer.

It was designed in 1937 and used mostly in singleended output stages of radio and tv sets. Complete individualized stages the driverpreamp, outputs and rectify power supply stages. Can anyone explain the difference in sound signature between 300b 2a3 kt88 el34 tubes. Boyuu a50 ii 300b tube amplifier hifi exquis reisong 12at7 6v6 driver lamp single ended integrated amp bya502 enjoy free shipping worldwide. Center tapped version with lundhal transformer driver tube. Now special 6 players can enjoy the earlier breakup, distinctive midrange complexity and legendary top end chime that only an el84 can provide. And on the 300b output stage, each tube is fed, ran and cooled by its own circuit board for best separation and stability. In singleended tube amps one 6v6 output tube can produce about 5 watts of power. Sep 29, 2010 parallel pushpull 300b mono amplifiers rudolf moers from the netherlands has kindly sent us details of his parallel pushpull 300b monoblock tube amplifiers to share with the diy audio community. This adds gain, but compromises the drive to the 300b. There are a few more 2 stage schematics out there without going for a pentode driver, which is a further option. In drive stage 300b current is 35ma, in the last stage 300b current is 60ma, output is about 810w. Boyuu a50 ii 300b tube amplifier hifi exquis reisong 12at7 6v6.

I have heard many all tube amps that sound a lot more transistory like german octave, not to my taste. All these tubes are pentodes or beam power amplifier tubes. Prestage is 12at7, secondary stage is 300b, driven by choke transformer, coupling to 300b. This board is now 2mm thickness for even better mechanical strength and reliability this is a bare pcb of a tube amplifier. Set amplifiers combined with fullrange drivers come closest to reproducing the. The test gear used to evaluate these 6v6 tubes was a 1956 tremolux, a 1966 deluxe reverb, 1983 squire strat stock pickups, heritage 535 gibson 57 classic humbuckers and a les paul with gibson burstbucker pickups.

With elrog bringing the thoriated tungsten filament back to life in their version of the 300b, one could hope that the type 10 globe might be resurrected some day in the future, as unlikely as that may have seemed just a few years ago. If for whatever reason you need to build that amplifier, i would suggest doing away with the triode strapping idea through a switchor not altogether as i have performed many blind listening tests with the 6v6 wired triode and pentode and could never justify the drop in power output for this particular tube. 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. The 6v6 tube, when wired in single ended, offers a kind of sound that is very. The tube 6m6 can also be substituted directly by the tube el33. Boyuu latest bya502 300b tube amplifier a50 hifi exquis. Explain to me the tonal differences between 6v6 and el84. Stereophile magazine placed this tube at the top of the 300b category, and this new production version is much easier to obtain than a vintage pair of bottles. Its large octal format is more rugged and less prone to intermittent pin connections than miniature type. Elekit has had a long history of using icop amp in their products and the designers skill is apparent. The best reverb driver tubes telecaster guitar forum. Class a single ended triode operation is the simplest and purist circuit possible.

I like the 6v6s a lot because of their tone which tends to be on the warm side with what i consider to be smokey overtones, plus they also have the early breakup which i prefer as well. See more ideas about valve amplifier, vacuum tube and diy amplifier. This is the bare pcb of a tube pushpull power amplifier, making use of very musical v6 tubes. They have the same base, connections and heater volts but differ considerably.

Hybrid tubesolid state rectifier system provides the stability of diodes with the smoothness of a tube rectifier. The amp uses two tubes in parallel, which makes it easy to produce 30 watts of clean and wonderful singleended 300b power. Raphaelite potting permalloy 5k driver transformer for 6v6. Each channel makes use of a single low noise tube 12ax76n11 at the input and proceeded by a power tube 6l6el34kt88 to accomplish power amplification. Single ended 6v6 hifi buizenversterker, hifihobbyist, electronics projects, schakeling. An ot was used, handling 8 watts and providing impedance matching from a 5k primary to an 8 ohm secondary, which is a common loudspeaker impedance. Parallel pushpull 300b tube amplifiers diy audio projects. The short plates reduce interelement capacitance for rf applications. Comparing eight tubes for low power amplifiers article submitted. Boyuu a50 ii 300b tube amplifier hifi exquis reisong 12at7 6v6 driver. The design is with reference to the audio note kit four. Using typical operating parameters, the 6v6 power tube, operating in triode mode, has an ideal load impedance of 5k ohm, and generates about 4. This metal bottle rca 6v6 is the way to go if you want a tube that can take a beating and still sound great. To go on about the subtle tone variation would frankly be a.

Pentode or 6 related seriesserious of high end tube. I tested 10 different sets of 6v6s in a fender tweed deluxe and fender blackface deluxe reverb. Discover over 708 of our best selection of 300b amplifier on aliexpress. In traditional set amp, the direct current of output triode from 30 ma for triodestrapped 6v6 to 250 ma for 6c33c flows. A typical triode audio power amplifier will have a driver that provides voltage gain, coupled to a triode like. Although fender is best known for their 6l6 tube amp designs, they have had huge success with the champ, princeton, and deluxe tube amps that all use 6v6gt output tubes. Aqua blue diy specialist single ended tube amplifiers, direct heated triodes. They were designed to be an rf radio frequency tube. The stock pair are very late production ge 6005s note different vendors have different tube options. In the meantime, the new shuguang we300b tube is a new option were excited about and worth considering. I am staying with 6v6 just because i have a large stash. The 6v6 is a lowervoltage, lowerpower 350v, 14w beam power tube see photo 3.

Mc300c use two level driver to assuer the 300b sound quality, famous 6n8p6sn72, 12at72 psvanes 300b 2, rectifier use chinese 5z3p1, it can be replaced by 274b or 5u4 etc to improuve the sound quality. Precision matched on our amplitrex at and maximatcher units, just enter qty 2 for a matched pair within ma. It is still in use in audio applications, especially electric guitar amplifiers. To go on about the subtle tone variation would frankly be a waste of time. I totally agree with maynard on his suggestions regarding the original schematic.

The special 6 el84 adapter reconfigures the special 6s 6v6 output tube socket to accept an el84 output tube. As mentioned, a two stage is simpler and does not need to include a. I didnt include any individual tube bias or balance adjustments, so i. The 6bq5s the power output tubes are still easy to obtain, with many different brands to choose from. This 300b singleendedtriode set amplifier circuit uses a direct coupled 6sn7 driver stage. Comparing eight tubes for low power amplifiers article. In a single ended setup, the 6v6 is dark, smooth and can get raggedwooly when pushed to the max.