Its very well built, way beyond spec, with excellent sound and very low noise. Jj ecc99 is basically a e182cc thats been repinned to 9a like 12bh7 or 12au7 pinout and it works well in place of 12bh7 or 12au7 as a phase splitter on our boards. This would have the additional advantage that the voltage supply may be increased by. These ecc99 tubes might be the ticket for a new amp i want to build for my set of bag end cube speakers. Their impedance is pretty typical of headphones, at 120 ohms. Bold designators are close or identical, italic designators are different ratings, different pinouts or different filament voltages. I may wish to use them in this design rather than have to buy the 5687 or ecc99 tubes mentioned in this designschematic.
There are a lot of ecu circuit diagrams, documentation, charts and graphs in our database files with important information which will be interested to. Current production 12bh7a from electroharmonix is a direct replacement for any 12bh7 and 12bh7a tubes. Aikido 9pin mono pcbs and 5687 pcbs and hybrid tube. I also showed a tube power amplifier that both looked like and was a true cathodefollower power amplifier. Most commercial tube amps only have 1 or 2db of headroom in the driver circuit.
I found that feedback to the cathode of the driver from the plate of the el84 produces an excellent result. This little guy is a headphone amplifier that i designed mainly to drive the fine akg k headphones. The 6n6p double triode is miniature device enclosed in glass bulb provided with a ninepin base and an indirectly heated oxidecoated cathode and designed for low frequency power amplification. Thats not really public info and a dealer would just order another ecu if they found one with a problem. The subject of appropriate driver tubes for directheated power triodes is quite. Theres many a valve radio still in use, and there are many valves lying in the junk box waiting to be rediscovered. Can be used in place of 12au7 or 12bh7 in certain applications like our dynaco boards. Cathodefollower power amplifiers last time, i presented a tubebased power amplifier that looked as if it used a cathodefollower output stage, but didnt. The ecc99 is typically used as a driver for power triodes in 2a3 and 300b. Hi i am looking for a schematic for a good el84 ecc83 amp. Ecc99 is a capable and popular mediummu 5w twin triode, which is reported to be very linear, quick estimates shows that a 2stage ecc996c33c amp needs over 10vpp of input signal and therefore the amp with ecc99 as a driver must have at least 3 stages. Audio note m3 manley jumbo shrimp ayon cd player audio note dac 5 signature and audio note amp kits, m5 preamp, m9 kr enterprise 32bsi integrated set amp modwright 9. Replacing with 7119e182cc fixed the problem and e1822cc can swing a pile of voltage. A twin triode tube would make life easier and we have many to choose from, such as the 6bl7, 6bx7, 6h30, 6sn7, 12au7, 12bh7, 5687, and ecc99.
Diy vacuum tube valve amplifier projects hifi audio. Dear fellow diyers, after quite along time, finally decided to start my first tube amp project. Ecu wiring diagram, schematics for cars and additional information for bosch edc16, edc17, edc15, me71, me75, med7. Anyways, orest wanted a design that uses ecc99 as a driver. Please see the substitutes at the top of the page for more details. The ecc99 tube is a double triode in one envelope with a 9 pin base. Second, id build a negative rail by adding 2 diodes to the rectifier and use that. Anyway i schetched a schematic that may or may not work. Ecc99 is a capable and popular mediummu 5w twin triode, which is reported to be very linear, quick estimates shows that a 2stage ecc99 6c33c amp needs over 10vpp of input signal and therefore the amp with ecc99 as a driver must have at least 3 stages. Ecc99 jj tesla tube a new tube recently introduced by teslajj, combines electrical characteristics similar to 7119e182cc high transconductance and low plate resistance with a pinout the same as 12au7ecc82 or 12bh7. The gain stage need not provide a lot of amplification, though, and can be the other half of. As can be seen from the schematic, the molly is clearly derived from her big brother.
Yeah, its a fancy name that doesnt do any good to me. It will give a little more gain than the 5687, but i dont think it will drive the 2a3 to full power without an active preamp ahead of it. Spend more and sacrifice convenience if you need this versatility, start your search here. Nov 06, 2009 whats best among e182cc, ecc99 and 5687 in a driver stage with one 2a3 for a pse 845 amp. Nevertheless, despite the frequent trips to the loo, and the discomfort experienced, theres always a good thing to it. So it is excellent as a driver for power tubes like 845, 300b or 6c33c. Anyone here tried a 5687 as a driver tube through an it to say a 2a3. Its electrical characteristics are pretty close to 5687 as well. As i replied you at, i dont think its a great idea to use a 5687 worse an ecc99 which is not direct 5687 replacement on a circuit designed around the 6sn7 if you cannot change plate voltage, bias current and other parameters to take the tube to its specified performance. Single ended ecc99 6c33c amplifier with regulated tube ps. The 5687 tubes are operated at 115v, 4v and 25ma, which is one of the more linear regions for a 5687. Below is our current selection of 12bh7 audio tubes. Please enter your product details to view the latest driver information for your system.
Now it mostly reads like i need a powerdrive circuit to drive a xxxx tube. So for your amp youd need either a direct adapter from the amps 6sn7 socket to the ecc99 s pins, or using two adapters, one from 6sn7 to 5687 and a second one from 5687 to your ecc99. The basic structure of the amp could be easily setup to run any highgm triode ecc99, 5687, probably 6n6p though i havent done the math, please no 6c45s, too much gain and they wont like the fixed bias. As you can see in the left graph, the pins layout of the ecc99 is not the same as the 5687 s. It is described as a general purpose medium gain triode pair with good emission. The b9a ecc88 and its pretentious cousins, the e88cc, cv5358 and 6922 long life version, found in audio research, conrad johnson et al cannot be tested, even though the modern unofficial ecc99 driver can be tested. Pp2010 push pull test december 7 st, 2009 click here to see the complete project schematic test 1. I have a ton of 12at7 tubes lying around including some quite expensive exotica. Now, all the tubes are 5687s and the pcb is an allinone effort that holds. Each channel uses both sections of a 5687 vacuum tube with led biasing used on each section. My last post generated much more interest than i had expected. Ive tried to list links where there is 1 a picture, and 2 a schematic.
Some of the pages are in other languages, particularly german. Follows the schematic of my first test to check the quality of the output transformers in the most simple configuration. For more information on 12bh7 vacuum tubes including pinouts, ratings, application and possible substitutions visit 12bh7 in. In general the mediumhigh gm triodes e182cc, 7119, 7044, 5687, ecc99 all seem to s 12. You dont need to build many amps to learn variations of the same theme im forever plagued by indigestion problems. Nov 10, 2019 5687 led biased tube preamplifier 1 march 2007 vincent has pulled together a fine looking preamplifier that is based around the 5687 twin triode. I already build a standalone spring reverb with a transformeless driver for tank for a studio use i put a steup transformer and i have 12vpp at the tube grid it work good, but i want to drive more the tank and dont know witch values i need to tweak arround the tube i follow the valve wizard recommandation. Keep the 6sl7 as input and go with a 5687, ecc99 or. The 6n6p double triode are miniature devices enclosed in glass bulb and are provided with a ninepin base, rigit leads and an indirectly heated oxidecoated cathode. Vacuum tube ecc99, jj electronics antique electronic supply.
A haynes manual is not going to give you a schematic of the ecu. There seems to be a general lack of vetted and communitywide set designs out there. Using jj ecc99 in place of 5687 tubes do it yourself. Sep 26, 2009 as you can see in the left graph, the pins layout of the ecc99 is not the same as the 5687 s. This is a 3 watt stereo amp using2a3 power triodes in single ended configuration. In particular, unless you are planning to add a feedback loop, id ditch the 6922 for something with a little less gain. Two 12ax7s would of course also work, and was used by fender in in. Jun 08, 2010 diy 12ax7, ecc99 miniamp here is one of my latest projects, a 12ax7, ecc99 miniamp. 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.
When using a transducer, the cirrusecm can be used to power the transducer up to 18vdc. I may wish to use them in this design rather than have to buy the 5687 or ecc99 tubes mentioned in this design schematic. My ccsloaded ecc995687 amp for hd580600650 headphone. The schematic of the preamplifier section is shown in figure 01. This tube can also be a functional replacement for 5687, e182cc, 6840, and 6bl7. To keep potential hum at a minimum, the heater filaments are supplies with dc. His taste in speakers tends towards higher sensitivity designs and his current amp is actually a low cost chinese import called a bez. Inspiration has always struck during this time of solitude. The circuit diagram of the amplifier is shown in fig. The other new pcb is a mono aikido board for 9pin triodes, such as the 6aq8, 6bq7, 6dj8, 6cg7, 6fq7, 6gm8, 6h30, 12at7, 12 au7, 12av7, 12ax7, 12bh7, 5751, 6922, ecc99 why a mono version. Initially, i tried ac for the filaments and the result was far too much hum, so dc is used for the heaters. Actually, the age of valves is already past but valves just refuse to go away.
Description the 6n6p 66 double triode is designed for low frequency power amplification. This makes sense, 5687 was mainly intended for use in dc amplifiers in tubetype computers. The circuit shown in figure 1 shows the complete power supply and one channel of. The filament supply for the inputdriver tube is from a 6.
A similar schematic uses the 6sl7 as a 2 stage driver classic british 18w tube guitar amp kit 1x12 combo. If a motor has a 120 vac power cable with a jumper and 240277 vac is supplied to the motor it will be destroyed. I wanted to try to change the input stepup transformer to the tube active stage. I suggest you talk matters over with your amp builder. English language schematic for the fever 6j1 preamp circuit. Of course, a different tube or tubes could be used, such as the 6bl7, 6bx7, 6c33, 6h30, 6sn7, 12b4, 5687, ecc99, 300b, and a triodeconnected el86 might be the best choice. Double triode ecc99 is a 9pin double triode usually used as a driver for directly heated power triodes i. Ive had excellent results with the 6n8p which is the chinese militiary version of the 6sn7. I built a 5687 preamp with wilson current mirrors for equal bias on. The 5687, 6900, 7044, and 7119 are at the head of the line for low output.
My idea was to build a tube amp head for home practice and recording just as small as possible, but with the usual amp design. This package provides the st microelectronics free fall sensor driver and is supported on latitude, precision, tablet and optiplex that are running the following windows operating systems. I posted this on also, but no answers there either. The amplifiers input and driver stages are simple enough, as is the output stage. Outlets on some of these types, could have different setup.
The assumption was that a 6as7 or 6080 or 6082 dual triode would be used as the output tube. The gain of the driver stage was more than 60x, so i get about 1. It took a while for me to find a good schematic, then another while to draw it into something possible to read, but here it is in all its pride and joy. St microelectronics free fall sensor driver driver.
In fact, i started acquiring 7119 and 5687 several years ago with the facts in mind, but i have never put the tubes to. There is something funny in the datasheet stating that 4 ecc99 tubes 10 watts. It has an excellent reputation and is electrically similar to the tubes like ecc99, e182cc or 5687. This is an advanced kit suited for builders with previous amp building experience. Does anyone have a very simple and good schematics or idea for how to build the amp. Ecc99 ever since this unique double triode from jj was introduced back in the late 1990s it has become the tube of choice for use as a driver for power triodes like the 300b and 2a3 and in the output stage of headphone amps, preamps, cd players and small class a triode amps. Smartfan cirrusecm can be used to control one or two ec motors that accept an open collector pwm or 012vdc pwm control input. Been reading a bit, and have decided to do a 5687 tube preamp. Since the ecc99s plate resistance is about to 14 that of the 6sn7, we can get a much bigger platevoltage swing from it. Figure 01 5687 vacuum tube hifi preamplifier schematic with led biased.
The idea for a new set transformercoupled headphone amplifier has been rolling around in my head for a while now, and is the result of several factors. The 5687, 6900, 7044, 7119 and ecc99 family are at the. I always had a feeling, that i can get more dynamics and feeling of power from gm70 tube. A while ago a friend asked me to make him a power amplifier. I know intellectually that ecc99, 5687, 7119, etc, should make a better driver stage, on paper for sure, but like you i am very fond of 6sn7 and have found it hard to get around its mystique. You got me pegged i recently designed a little differential headphone amp 5687 or ecc99 output. At an intuitive level, the idea of a threestage amplifier composed of an input 568770447119 driving another 568770447119 driver somehow just felt wrong.
Ecu circuit diagram for bosch ecu schematic autodtc. Gm70 amplifier project 20032014 gm70 amplifier project, started in 2003. The heart of the preamp consists of a 12ay7 and a 12ax7. The picture clearly shows the pair of flat cathodes at the top, with the copper grid supports either side of each cathode. This kit comes only with a schematic and wiring diagram. This configuration is also called srpp, give a look to the srpp preamp that uses it extensively see also pats site. Whats best among e182cc, ecc99 and 5687 in a driver stage with one 2a3 for a pse 845 amp.
The input signal to the ecc99 must be reduced to avoid overdriving it too. Essentially anything with a plate resistance around 22. Motor speed is regulated based on a control signal input 010 vdc, 020ma, remote transducer or remote thermistor. Outlets on some of these types could have different setup. Its relatively high transconductance and low plate resistance make it a good choice as a driver for larger tubes popular with the dht crowd as well as a suitable tube for low power output stages headphone amplifiers or small pushpull speaker amplifiers. Ecu circuit diagram database consist of 400 documents for downloading.