July 2008 another electronics circuit schematics diagram. All of the 6dj86922 ecc88 e88cc we carry are plugin compatible where 6dj86922 is called for. Further factory selected version of electroharmonix 6922eh with gold pins. An e88cc, is the european designation,for a 6922, and was made to be the industrial upgrade, to a ecc88.
What is the difference between 6922, ecc88, and e88cc tubes. Langfordsmith, editor, radiotron designers handbook, 4th edition, harrison. Surplus electronic equipment full of top quality items. Small signal dual triode similar to 6922, 691p, 6dj8. Just thougt id share some interesting experience in tube rolling in the ecc88 valve buffer stage of my modified mf kw250s recently. Also the circuit diagram for ecc89 cascode stage clearly implies agc. Pulls twice as much heater current as a 6922 and has different operating conditions so it will likely change the sound of the amp. A better approach to compensating feedback loops to add a capacitor between the grid and plate of the tube to which the feedback returns usually the input tube. A software solution allows instructors to prepare and reuse virtual labs. I visited another site, where the builder made ecc88 otl heaphone amp using 3 of ecc88 tubes, and found it is very interesting, too. But really, it can be quite a shock to hear a good valve amp and im glad you like it and find it as beguiling as i did. Most have gold plated pins, but many sylvania manufactured 6922s have steel pins a few sylvanias are gold pin. I modified the sym pentode as it has 5 pins and changed it to 4 pins.
Use of these parameters shall be entirely at the users own risk. Aes elibrary flutter measurements by the american standard. The sonic characteristics of this amp depends to a large extend on the choice of this input tube other dual triodes with the same pinout and filament voltage may be substituted to attain personal taste. It has to have a warm glowing appearance to look real. Diy 6dj8 ecc88 tube hifi headphone amplifier project. Tube ech 81 or rohre ech81 id375, triodeheptode, noval, b9a and frequency converter shown. Datasheets another electronics circuit schematics diagram. These siemens pcc88 are drop in replacements for ecc886dj8e88cc. I renamed the syms to kpentode, ktetrode and ktriode to id them as being used by the koren library. In fact, it models spectacularly well with the ccs in the tails, and still surprisingly well with just a 100r resistor in the tails straight to ground which isnt supposed to work well at all. Real siemens pcc88 are drop in replacements for ecc886dj8e88cc these beautiful nos siemens tubes are outofproduction.
One triode acted as the local oscillator and the other as the mixer frequency changer. Which are the best of current production ecc88 valves. Dear sir, id like to order one matched quad for my dynaco st70. Firstly some background i have always found it fun to. I have a rule of thumb, that says that if all things are equal, that on a given piece of kit, you have to double what you spend, to get a worthwhile improvement. Im attempting to recreate a tester for 9 pin dual triode valves. Circuit simulation gives students a fast and fun practical learning tool. Letters should be brief and accompanied by your name, email address please indicate if we can publish your email address, city and country. Bypassing preamp section of hybrid amp 2 channel hifi wigwam.
Jun 20, 2012 im just not a fan of buying a tube hidden inside a glued on crate that keeps me from seeing what type of tube i actually bought. Do you think your design will drive hd600650 better. Since the 6dj8 sections will each be drawing about 12ma, the two of them together should draw around 24 to 25ma. Letters to the editor the tube cad journal welcomes letters from its readers. The rc network formed by this capacitor and the input gridstop resistor a 2k to 10k resistor which should be added if not present then becomes the dominant frequencylimiting network. Ears manual describes these tubes as not being replaceable by the user, notwithstanding the relative ease of removing the case. Musical fidelity mxhpa headphone amplifier portable audio. For example, audio illusion 3a tube preamp is known to eat tubes because it is design to drive the tube hard. It is distinguished by its very high transconductance, mostly the result of its frame grid construction. Comparing the s curve graphs for ecc88 and ecc89 referenced by golfguru above it looks like ecc89 is indeed a semiremote tube.
I want to try amperex tubes but they sell two models, 6dj8 ecc88 bb and 6922e88ccbb. The genalex gold lion e88cc6922 is a premium grade selected small signal twintriode that is a suitable replacement for all 6dj8, ecc88, 6922, e88cc, and 7308 types. This low power tube headphone amplifier is designed along the lines of the oddwatt power amplifiers, except that this headamp does not require a driver. Electronic circuit simulator spice simulation with. He does not believe i am able to bring joy to readers. Diy audio projects forum 6dj8 ecc88 tube headphone amp. Chapter 6 digital audio recording 93 john watkinson types of media 93 recording media compared 96 some digital audio processes outlined 97 hard disk recorders 104 the. Please share your views, opinions, design ideas, and critiques with us. Proteus design suite pcb design and circuit simulator software. Nos siemens halske e88cc 6922 greyshield holy grail of the 6922 family. A all round great performing preamp tubes used in both hifi systems and guitar amps. Sacd and dvda player ratings are based on how they sound with their respective hirez media, not cd.
Tube depot carries a selection of 6dj8 6922 ecc88 e88cc cv2492 pre amp vacuum tubes. Yes, there have been many long attachments detailing the build procedure, but its the pictures that take up a lot of space. Nos siemens pcc88 tube pair for 6dj8 6922 e88cc preamps. This tube features gold plated pins and is manufactured to extremely tight specifications, making it the highest quality current production e88cc6922 available. View topic drop down menus for selecting your tube.
Jan 28, 2005 i copied 3 tube symbols from misc to a new directory sym\tubes. A listing of just some of the embedded peripherals models available as standard with proteus vsm. Universal pcb for tube pre srppccda ecc88 ecc82 from. What is the difference between 6922, ecc88, and e88cc. It just means the tube will have a longer life in your amp. Tina is a powerful affordable circuit simulator for analog digital mcu and mixed circuits with integrated pcb design running both offline and online. The 6dj8 is a miniature ninepin medium gain dual triode vacuum tube. It all sounded a tiny bit less spacious and ever so slightly more grey. For realistic renders, take care to add appropriate appearance the the heater part.
The overall sound is slightly less refined and dynamics seem a little bit blunted compared to the eat sound. Hello, im new to electronics but im learning a lot. I had the same tubes 15 years ago, i use jj tesla el34 at the moment and they cant compare with nos mullards, please repond to my email. Now, imagine if you could enjoy the bliss of an ecc88 without the size, the fragility, the heat you know, all of the stuff which transistors offer while throwing away the sound. He launched 73, a competing magazine, which promoted emerging technologies as doityourself projects. Pulls twice as much heater current as a 6922 and has different operating conditions so it will likely. Proteus usb simulation is a unique product for developing usb device products.
So take each tube on its own individual merits rather than judging it by its model number or pin material gold pins do not necessarily better sound. Perform live, record mixes onthego, or enable automix mode and let djay mix your favorite playlist automatically. Editor david price will, however, suspect i wrote the letter, your praise is so effusive. Pdf 51j4 6be6 tube 6ak5 tube 6ak5 rs tube scansu9x26 collins filter 12ax7. W e will present some fresh looks at some old tube circuits and some altogether fresh tube circuits as well.
Very similar in sonics to the e188cc mazda made dimple disc getter tubes listed above. Tube ecc 88 or rohre ecc88 id2488, double triode, noval, b9a and uhf shown. I took korens tube library and split it into pentodes, tetrodes and triodes and copyed the. Type the name of your logo in the popup window and click ok. View pdf brochure for e88cc 6922 6dj8 jj electronics. Visualizza altre idee su amplificatore valvolare, elettronica e radioamatori. A list of circuit simulator softwares to download for free. Jan 28, 2015 the 6cw4 nuvistor triode is roughly equivalent to a lilliputian ecc88, the 88 being one of the most highly regarded preamp tubes in use today.
Best free online circuit simulator element14 development. As i understood it and i could be wrong, the lm317 was replaced by a 100 ohm resistor, from the joined cathodes of the 6dj8 ecc88 sections to ground. The ecc88 is a vhf double triode with separate cathodes. It could be a sovtek 6922 lurking inside that crate for all you know. There are 5 types of tube in this group and they are all made by the famous telefunken with marking at bottom.
Heater psu for ecc88 leg 9 is connected to the shield that separates triode in the tube it can be shorted to ground. Mar 19, 2005 a question for all the tube enthusiasts. After finished my simple 12ax7 tube preamp, i decided to try other medium mu tubes, including the 12au7 and also this 6922. I dont know anything about tubes, so any help on this matter would be very appreciated. Sep 11, 2014 6n1p is a unique russian tube that will often work as a 6922 sub but it aint the same. The design is almost the same as the 12ax7 preamp, it is a single gain. He also was an editor of cq amateur radio magazine for five years before starting his own magazine. When i finally get around to building this, i intend to put a negative supply in the tail so i can experiment with it. Sep 03, 2016 best free online circuit simulator posted by maxblack in development tools and solutions on sep 3, 2016 5. These specifications are provided asis, with no warranty of any kind. I purchased a mp of amperex 6dj8ecc88 bugle boy large o ring getter made in holland tubes, mid 6os vintage for the following.
This premium grade selected tube is the highest quality current production. Sorry bruce, i didnt mean to imply that this little amp doesnt model well. I hope ive enticed a few people to give this project a try. The formula calculates the frequency response based on the triodes amplification factor and plate resistance. Wondering if tinned copper would be an improvement over ofc. 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. High reliability version of 6dj8 with slightly higher power rating. Audio research reference 250 kt120 black vacuum tube mono power amplifier reference series pair 28. Diy audio blog, audio workshop page 24 of 26 diy audio. This unusual tube is basically a 7308 e188cc in a slightly taller bottle. It was known for its strong emphasis on technical articles and for the lengthy editorials in each issue by its founder and publisher, wayne. Im thinking of changing the tubes in my headphone amplifier musical fidelity xcans v2 which has a couple of janphillips e88cc tubes. A pioneer promoter of ssb, fm, solidstate, easy construction projects, and the marriage of. This exhibit is of earlier manufacture than ecc88 as can be seen by the logo.
Small signal dual triode intended for linelevel amp. Within a couple of years, he had 2,000 subscribers. Write for doityourself tv test chart and tube list to dept. Proteus design suite is found in high schools, colleges and universities across the world, teaching electronics, embedded design and pcb layout to tens of thousands of students each year. Versions of the tube are named ecc88, e88cc, 6922, 6n23p, and 6n11. With the exception of the re c tif ie r tube, all a re of the m in ia tu re type. The ecc88 was designed for service as a cascode amplifier in the front ends of vhf radio receivers. The filament current draw is also slightly higher but for most applications it is plug and play compatible with the 6922, 7308, cca, or. Our purpose the tube cad journal is a n online magazine devoted to tube audio circuit design.
Use save as to save this new library with a suitable name. Rare french mazda made 6dj8 tubes, not often found in the usa. Complete assembly of the famous ecc88 double triode. Electrical circuit simulator software circuit diagram images. The 6922 is the improved version designed to lower microphonics and improve life span.