Tubelab Kt88


This board (in the amp shown below) can be used to build a complete SE amplifier, including the power supply. Biased according to the schematic each KT88 will draw 75mA and the 6N1P will draw 8 mA or so. I have searched the forums and have not been able to find a specific reference to the purpose of the 5H 250R choke and 10uF cap for the 6N1P plate as shown on the schematic:. Audio advice and discussions with audiophiles and professionals. com are a great resource also. This is an Aikido circuit with 6N1P driving 7044 tubes. Project Cntry Main Page Description Parts Tubes Type Subtype; 1: The Minicaster AM Transmitter: US : Phils Old Radios Now here is a construction approach that anyone can follow. Poca ma fatta bene. I just bought the iron for a Tubelab Simple SE build, so selling these is probably what I'll do. I built the enclosure, made the volume knob, did the wiring etc. Using two of them, a push pull amp could be made. Tubelab SSE The SSE (Simple Single Ended) board is used to make a simplified SE amplifier that uses indirectly heated tubes like the 6L6GC, EL34, KT88 and 6550. Only have a set of coke bottle 45's right now, haven't been able to pry my wallet open enough to buy a pair of globes. I decided to begin with EL34 and later upgrade to KT88. The mode (Triode / UL) switch, the Cathode feedback switch, the standby switch, and the rectifier switch are optional, and should be hard wired into the desired position if they are not used. Audio Asylum - Search of All Forums - Enter your search criteria. As you can see, I am running both channels off one rectifier tube. This is a DIY amp built from the Tubelab SSE board. tra le valvole poco utilizzate, e facenti tutte parte della famiglia della 6L6, ci sono sicuramente la 1624 e la 1619, entrambe a riscaldamento diretto, la prima UX5 uguale alla 807, la seconda metallica e con zoccolo Octal, entrambe sono appetibili per dei PP con OPT 6,5K e 10K pp rispettivamente, la 1619 a pentodo può validamente utilizzare un TU da 8Kpp per EL84, altra valvola di media. This is the result. Watch Queue Queue. Currently hooked up to a pair of Klipsch Forte II with Crites upgrades, and it's the best sound that I've heard. How was this photo taken? Turn off the room lights. Mạch lái này được biết với những cái tên tiếng Anh như power drive (trang Tubelab) hoặc Mosfet follower. A tartalom bővítése érdekében áthozom ezt a régebbi (2010. Tubelab SSE The SSE (Simple Single Ended) board is used to make a simplified SE amplifier that uses indirectly heated tubes like the 6L6GC, EL34, KT88 and 6550. A google search lead me to the Tubelab website and boards, the SSE board is for KT-88 and the like, with a 12AT7 driver. At 730 v they have more bass than a kt88 ( perceived), and a beautiful sparkle. They make kt88, kt90, and kt100's now, I have a set of kt90's in my 32v3 that sound great. Discover (and save!) your own Pins on Pinterest. Shop through amplifiers & receivers in the marketplace on Audiogon, the High-end Audio Community. If you can get your hands on a matched pair they may make an interesting output stage. Begonnen von Coffmon « 1 2 Arbeitsgerade Gittervorspannung KT88 SE. They truly sound great. Other than that great amps and lots of support with an entire tubelab forum over on diyaudio. Not everyone is into DIY, but if you lean in that direction, building from a good kit, first up, is a good way to start. It remains the case that a tube's (cycle averaged) plate dissipation should not exceed its limit at any signal level. If you want to find the "best" for you,you're going to have to bite the bullet and do some experimentation. I'm willing to entertain any reasonable offer. Tubelab SSE SSE for sale. This video is unavailable. New Search. You have to realize that what someone else thinks is the "best" might not work for you at all?There are too many variables involved to say one tube is the best. Found total of 427 records, Query: kt77 in Tubes Asylum, Time: 0 sec. The big question is how to drive them, I must admit Tube lab's powerdrive looks good. I've put together my build so far in this specific thead rather than a bitty one in my systems thread. The driver stage is an SRPP using a 12SL7 tube. To be honest, no I haven't. It is also good to load the 12AT7 with a CCS, (G Pimm Batt CCS) but just a plate load resistor sounds surprisingly good. 2 août 2016 09:50 Merci a tous pour vos commentaires. Most of the guesswork is done for you on those. My latest Tubelab SE glows in dim light. Careful attention would need to be paid to phase labeling and any power supply would use a bridge rectifier, but those are pretty small prices to pay for more flexible parts. Tubefool Thats the scenario I always get when I go from an EL34 type to a KT88 or even a KT66. 93) Posted by airtime on 2016-07-08, 08:31:47 (68. This one is the Odd Blocks which will work with a number of octal tubes (KT77, 6CA7, EL34, 6L6GC, KT88, KT90, 6550). com with this and other designs for which he provides the PCBs and encouragement. (A)sevtlana 6550C, sev KT88 and the KT-90 type 3 from kevin deal. Es hat sich in über 30 Jahren HiFi-Hobby so einiges an Wissen und Weisheiten angesammelt, welches ich hier gerne an Interessierte weitergeben möchte. Tubelab support states that the smaller hammond and Edcores will struggle with low level bass response. So there are two output transformers, one choke and two power transformers (one 6. The new tubes aren't cheap either but they are no where near as expensive as NOS Gold Lion KT88. I thought to myself that sounds like a fun project. jpg KT88 Push-Pull Tube Amplifier (monoblock) 2928 views The third of the "OddWatt" tube amp projects. They are supposedly high quality Shuguang made tubes, so likely the good old Mullard copy sound but without the fireworks. Output Transformers | Tubelab. The Tubelab SSE is a single ended amplifier. He used some KT88 tubes which I don't have so I used some 6HJ5 tubes that I had. EDCOR is an acronym for Electronic Development Corporation. In my experimentations, I want to try KT88 and 6550. com) circuit designer and consultant on many, if not most, of the successful designs posted there. Mi scuso per la mia assenza, ho optato per un single ended parallelo con delle kt88 e ecc82, l'ampli funzionava bene soltanto che mentre stavo tarando il bias di una valvola accidentalmente con il puntale del tester tocco il piedino della griglia schermo, l'altro puntale era messo a massa ( in modalità amperometro), innescando un arco. com and DIYAudio. This is a journal about my first experience building a HiFi tube amplifier. 93) Posted by airtime on 2016-07-08, 08:31:47 (68. At 730 v they have more bass than a kt88 ( perceived), and a beautiful sparkle. some brand tubes. They are a very robust design with cathodes larger than a KT88's. The circuit was designed by SGregory and DIYAudio friends. Product: EAR 890 Tube Stereo Power Amplifier; Re-capped. The JJ's sound the best to me when compared in the same amp. He suggested I buy one of their…. 3 volt output or two and a beefier voltage as well. The power conditioner at the bottom is a Panamax MR5100. The only components that are really near the bottom cover are the backs of a couple of the big electrolytics a. Also, are there any over arching tonal differences between 6550 types and kt88 types?. Come da titolo, ho sostituito le 16 valvole originali 6550 dei miei M300 con le JJ Tesla KT88. Without going to parallel, 10 watts demands KT88 or above. The Tubelab SSE board is used to make a simplified SE amplifier that uses indirectly heated tubes like the 6L6GC, EL34, KT88 and 6550. Input signal will be split with a Lundahl tranny and the positive and negative signal will be sent to each SE amp. jpg http://home. All optional features are shown. Power output differences aside, is there any inherent advantage to connecting in triode versus ultralinear for, say, an EL34 or KT88? Or are the sonics are dependent on implementation, quality of OPT, 48: Tubes Asylum, Which current production 12AX7 (0. Dere som har peil, kom gjerne med forslag. Im diesem Blog möchte ich sozusagen etwas aus dem "Nähkästchen" plaudern. Searches are limited to a maximum of 200 records. As is the case with many of us, I'm sure, I have to put projects on hold from time to time, either because I need to simply get away and see something new on the bench, or I'm too busy. cobar53 replied to Tony M's topic in Speakers & Subwoofers I have been impressed by two projects on the DIY Audio shop site. I power them with a cheap panasonic digital amp receiver. Our products have been installed worldwide for over 40 years. I used quality parts throughout the. But both will work with a bunch of output tubes, KT88, EL34, 6L6GC, 807, 6P3S, 6550, etc. com and DIYAudio. Begonnen von daniii88. I've heard CSXE25s in a friend's tubelab Simple SE amp here. Damping factor Going by that, it would indicate the control of bass via damping factor is less a problem vs the non flat freq response. I suspect not though, as the Tubelab page found some large discrepancies. (A)sevtlana 6550C, sev KT88 and the KT-90 type 3 from kevin deal. This is a DIY amp built from the Tubelab SSE board. Must share my amp and preamp toys though. Damping factor Going by that, it would indicate the control of bass via damping factor is less a problem vs the non flat freq response. Might see if I can get a motorised volume pot and input selector installed one of these days Though if doing that I'd go all out and have auto-biasing installed too. This Pin was discovered by Rebirth of Rennisance. Audio power amplifier circuit High performance audio amplifier kits up to 140 Watts 140 Watt Audio Amplifier Using 6 Transistors 4 Simple OTL audio amplifier circuit using can build easy and cheap, It's durable and very loud sound , Not needed speaker Protection. com), e sperimentare con la controreazione. That heavyweight frontend is not what I wanted for this amp. I was thinking about building a tube amplifier for a long time myself and my search ended when I came across "Tubelab SSE" designed by Mr. The driver stage is an SRPP using a 12SL7 tube. ECC83 and 6AQ5A which is able to produce a good 6-watts of unclipped power. Most of the guesswork is done for you on those. In conjunction with the 300V winding, the 50V winding will allow you to create 250V and/or 350V outputs (all voltages AC of course). org, radiomuseum. com circuit board is now built and playing music. What's the greatest bargain in SET these days? Hi, Gang, I response to my recent review of the Reference 3A De Capo BE speaker, someone wrote that if you really want to hear them sing, you should try them with a SET amp, or words to that effect. The KT88 fits a standard eight-pin octal socket and has similar pinout and applications as the 6L6 and EL34. Other than that great amps and lots of support with an entire tubelab forum over on diyaudio. I thought to myself that sounds like a fun project. I've tried to list links where there is (1) a picture, and (2) a schematic. The PCB tubelab SE could also be done P2P as some have done. Hi, That would be my first choice as well. Comme quoi sans outillage spécifique mais avec beaucoup de passions on peut réaliser quelque chose de présentable. Tubelab Simple SE - Description is a two-stage design with a single 12AT7 serving as the input stage to both channels and a pair of EL34/6L6/6550/KT88 type. 1: Psvane & Shuguang KT88 reliability. The Tubelab SSE board is used to make a simplified SE amplifier that uses indirectly heated tubes like the 6L6GC, EL34, KT88 and 6550. Watch Queue Queue. Audio Asylum - Search of All Forums - Enter your search criteria. Building Your Own Tube Amp. I'm willing to entertain any reasonable offer. I think the output tube grid drive method used by George in his Tubelab SE is fantastic. It's based off Tubelab's SE printed circuit board. We had a Gold Lion KT88 go cherry on us which blew a fuse and required a trip down to the local hillbilly electronics store. Recently finished building a Tubelab SE amp with 45's, at least built enough to use it. Mục đích của việc sử dụng kỹ thuật power drive là nhằm tránh hiện tượng blocking distortion và hạ trở kháng tầng lái làm cho amply hoạt động ở chế độ AB2. These fantastic boards were designed to be run as single ended amplifiers. tra le valvole poco utilizzate, e facenti tutte parte della famiglia della 6L6, ci sono sicuramente la 1624 e la 1619, entrambe a riscaldamento diretto, la prima UX5 uguale alla 807, la seconda metallica e con zoccolo Octal, entrambe sono appetibili per dei PP con OPT 6,5K e 10K pp rispettivamente, la 1619 a pentodo può validamente utilizzare un TU da 8Kpp per EL84, altra valvola di media. 560 ohms will put the EL34 and the KT88 at about 80% of max dissipation, but it hits the 6L6GC's pretty hard at about 90%. Searches are limited to a maximum of 200 records. 89) Posted by bluetube on 2002-07-31, 11:14:44 (61. On checking the Bias after a little while, on one of them, the bias kept slowly rising and rising. Tubelab SSE The SSE (Simple Single Ended) board is used to make a simplified SE amplifier that uses indirectly heated tubes like the 6L6GC, EL34, KT88 and 6550. I've put together my build so far in this specific thead rather than a bitty one in my systems thread. KT88-Push-Pull-Tube-Amplifier-Cover. See this thread: DA: 60 PA: 31 MOZ Rank: 10. Due to the high current and power capability of these tubes, it is very important that the KT88 tubes are well matched. As, from the report on the Tubelab site, some tubes have to exceed their limit quite considerably before redplating is evident, the 'bias in the dark. The reissue GL is also very good but takes 200 hours to break in. I suspect not though, as the Tubelab page found some large discrepancies. The driver stage is an SRPP using a 12SL7 tube. He has put a lot of effort in documenting the step by step instructions to build "Tubelab SSE". I'm interested mostly in what the effect is of dropping the grid leak resistor to 220k on the KT88? I've seen this value on TubeLab's Simple SE design for a similar amp. - Qualità: finali a triodo, driver CF accoppiato in DC (meglio ancora sarebbe il solito Mosfet, tipo il PowerDrive su www. The ideal primary impedance for this design is 5K ohms. Just a thought. it/gadgetblog/diodo_ledpolarita. They are a very robust design with cathodes larger than a KT88's. I power them with a cheap panasonic digital amp receiver. Biased according to the schematic each KT88 will draw 75mA and the 6N1P will draw 8 mA or so. My latest Tubelab SE glows in dim light. All optional features are shown. In the early 1980's we also produced Hammond R. This is our 70 watt Stereo Tube Amplifier kit we sell. Of these two I think I prefer the SED. You guys are great, this is all really helpful I found this an interesting read. This is a DIY amp built from the Tubelab SSE board. com and DIYAudio. Switchable between UL and Triode mode, switchable between SS or tube rectification, also switchable between 6L6, EL34 and KT88 output tubes. Building Your Own Tube Amp. com/3105/2562591094_bf04623f4c. He suggested I build a Single End, class A amplifier and told me to do some research on TubeLab. This is our 70 watt Stereo Tube Amplifier kit we sell. Mutual Conductance tube testers are the best for true vacuum tube performance. In most time 5881 is better than 6l6gc,kt66 is better than 5881,ou,perhaps you can choose 350b,If you prefer the warm and lush,kt66 is best. New Search. It only makes about 8 watts/channel. This board is used to construct amplifiers from a basic low cost design to a high end triode mode amplifier. What's the greatest bargain in SET these days? Hi, Gang, I response to my recent review of the Reference 3A De Capo BE speaker, someone wrote that if you really want to hear them sing, you should try them with a SET amp, or words to that effect. As, from the report on the Tubelab site, some tubes have to exceed their limit quite considerably before redplating is evident, the 'bias in the dark. But we managed to get in some great listening. Tubelab SSE SSE for sale. I'm still going back and forth on what to drive the KT88 / 6550 with. Hva finnes av KT88 byggesett der ute, som ikke koster skjorta? -jeg har egentlig gitt opp CE forsterkere (Cheap Electronics) fra Kina, og vil heller kvalitetssikre noe som fungerer men ikke er overavansert. Watch Queue Queue. I need one fast, but prices here are insane, and I just cant afford it. Also, if you build a KT88 SET buy 2 sets of cathode resistors and some EL34s too, I like the EL34 better more natural and less hi-fi sounding in my system. I've tried to list links where there is (1) a picture, and (2) a schematic. Re: Finished DIYed 2A3 SE amp « Reply #40 on: April 20, 2010, 15:55 » Normally, we try not to position the mains trans laminations parallel to that of the output trans and choke as the electrical field generated by the mains trans will affect the output trans and choke. 70) Posted by Cougar on 2019-05-03, 18:42:38 (68. As a result, KT88's and 6550's are produce cleaner tones and have low distortion, making it popular amongst bass amplifiers and high end audio applications. Biased according to the schematic each KT88 will draw 75mA and the 6N1P will draw 8 mA or so. I presently have a breadboarded version of the tubelab se with 300b's and was curious if you built this amp and how you would compare it to the elekit tu-8600. My latest Tubelab SE glows in dim light. It was a breakthrough power triode, but in those days it hummed away from behind a curtain in early Hollywood sound systems. KT88-Push-Pull-Tube-Amplifier-Cover. Xem thêm ý tưởng về Đồ điện tử, Tự làm và Loa. 3 volt power transformer came as a separate. Most of the guesswork is done for you on those. The front end is from 6GW8 PP amp I built a couple months ago which I found on a youtube video (Pixie amp by Guitologist). An intermittent resistor was giving me fits…but once diagnosed and replaced, it was all smooth sailing. A new customer wanted me to build an amp for him, and he had good Edcor iron, an XPWR010 power transformer, a pair of CSXE25-8-5K outputs and a CXC100-7H-150mA choke. 5-4k 100W Edcor output transformer with since screen drive circuit sounds about right for 100W or so. This is a journal about my first experience building a HiFi tube amplifier. Not everyone is into DIY, but if you lean in that direction, building from a good kit, first up, is a good way to start. The only difference here is that the 6. 3 volt output or two and a beefier voltage as well. Triode-wired single-ended amplifier designed by George Anderson, well-known (on Diyaudio. It's not red though, does this matter. On this basis I think kt88 would be the best tube. some brand tubes. com for Tubelab designs and you'll find a lot of help there as well as answers to commonly asked questions (just use the search). This video talks about the design and build process for this amp, which is built around the Tubelab SPP PCB. This is our 70 watt Stereo Tube Amplifier kit we sell. And both SE amps will work with only 3 tubes for stereo. The output transformer MUST be designed to work in a single ended amplifier. Tubelab SSE. The headphones are Sennheiser HD595 and the speakers used for listening were a pair of DIY rear-loaded horn cabinets with high sensitivity Fostex FE206En drivers. Edcor output transformers and choke, with Allied power transformer. Here is my schematic with the necessary changes to make it push pull. The new Psvane KT88-T (Treasure KT88-Z) might be a good alternative. You've got me interested in a few of these changes. So, please offer an opinion on the kinkless tetrodes - KT66, KT77, and KT88. KT88 duet powered Falcon 'tualatin' circuit with a limited edition chrome bumper guard Laguna Sunride 3 channel fuzz/distortion pedal? yes please. The amp can used KT88 also and 6V6, as well as can be wired in UL(with or without CFB) mode. com's SimpleSE amp. com and DIYAudio. They can draw grid current that must be supplied from a good low inpedance drive source. This is a journal about my first experience building a HiFi tube amplifier. That project is known as the Tubelab SE Board. Plus for what it's worth the KT88 seems to be less stiff and more expressive. Especially one that they have had experience building themselves. I thought to myself that sounds like a fun project. Must share my amp and preamp toys though. More details of the design are available here. The driver stage is an SRPP using a 12SL7 tube. Project Cntry Main Page Description Parts Tubes Type Subtype; 1: The Minicaster AM Transmitter: US : Phils Old Radios Now here is a construction approach that anyone can follow. These devices are indrectly heated with the cathode tied to one side of the heater filament and powered from a grounded centre tapped transformer as each anode goes positive, current flows with rectification occurring at each half cycle wi. But both will work with a bunch of output tubes, KT88, EL34, 6L6GC, 807, 6P3S, 6550, etc. This board is used to construct amplifiers from a basic low cost design to a high end triode mode amplifier. I don't like the gold plated bling on the Psvane, but whatever. 132) I have tried the Psvane 12AX7's in my Phono preamp and really like them but only have about 15-20 hours on them. Found total of 200 records, Query: KT88 +PP in Tube DIY Asylum, Time: 0 sec. Johnson did make good use of a pair of 6146 with a trio of the same in the big Valiant. Classifieds: FOR SALE - Tubelab Simple SE Single-ended Main Amplfier for EL-34, 6CA7, 6550, KT-66, KT-88 asking for $300. Damping factor Going by that, it would indicate the control of bass via damping factor is less a problem vs the non flat freq response. Its high dissipation rating (42W) and maximum voltage (800V) allow it produce more power than itse pin compatible cousins the 6L6 or EL34. Project Cntry Main Page Description Parts Tubes Type Subtype; 1: The Minicaster AM Transmitter: US : Phils Old Radios Now here is a construction approach that anyone can follow. Takes EL34s, KT88s, and more. Using the extra winding and some filter math, you could easily tune in any target B+ from low max voltage tubes like 6V6/EL84 to higher max voltage tubes like EL34 or KT88. I was thinking about building a tube amplifier for a long time myself and my search ended when I came across "Tubelab SSE" designed by Mr. 2 thg 12, 2018 - Khám phá bảng của ngoclinhboi9292"fu32 schematic" trên Pinterest. this amp has a simple 12aT7 front end, and which I can directly attest does a very good job driving the KT88. Conversely, switching the rectifier to a 5V4 will give you about 30 volts more than the 5Z3. it/gadgetblog/diodo_ledpolarita. Also, are there any over arching tonal differences between 6550 types and kt88 types?. Take a look at the following, especially the posts by "TubeLab". Tubelab SPP. They both can use affordable and common driver tubes, along with the transformers. The KT88 heaters require 1. tra le valvole poco utilizzate, e facenti tutte parte della famiglia della 6L6, ci sono sicuramente la 1624 e la 1619, entrambe a riscaldamento diretto, la prima UX5 uguale alla 807, la seconda metallica e con zoccolo Octal, entrambe sono appetibili per dei PP con OPT 6,5K e 10K pp rispettivamente, la 1619 a pentodo può validamente utilizzare un TU da 8Kpp per EL84, altra valvola di media. Enclosure is solid maple finished with danish oil with half inch russian birch ply for the top with an oil stain and acrylic seal. Audio power amplifier circuit High performance audio amplifier kits up to 140 Watts 140 Watt Audio Amplifier Using 6 Transistors 4 Simple OTL audio amplifier circuit using can build easy and cheap, It's durable and very loud sound , Not needed speaker Protection. I built a second octal driver board. A community dedicated to helping everyone learn the art of audio. 70) Posted by Cougar on 2019-05-03, 18:42:38 (68. The front end is from 6GW8 PP amp I built a couple months ago which I found on a youtube video (Pixie amp by Guitologist). I don't mind small (ish) output power but I really don't want a fancy frontend and a big voltage power supply to drive big KT88's to deliver a puny 25 watts output. The KT88 is an octal-socket beam power tetrode designed for audio frequency amplification. The circuit was designed by SGregory and DIYAudio friends. Watch Queue Queue. org, diyaudio. com and DIYAudio. In my experimentations, I want to try KT88 and 6550. Reflektor 6p3s-e, New Sensor KT88, Electroharmonix 6CA7EH, Shuguang 6L6 At one time I had some Sovtek EL34G in there, and some JJ E34L, and some GE 6L6GC. Broke it out this weekend. But we managed to get in some great listening. Es hat sich in über 30 Jahren HiFi-Hobby so einiges an Wissen und Weisheiten angesammelt, welches ich hier gerne an Interessierte weitergeben möchte. My latest Tubelab SE glows in dim light. jpg KT88 Push-Pull Tube Amplifier (monoblock) 2928 views The third of the "OddWatt" tube amp projects. Take a look at the following, especially the posts by "TubeLab". KT88 is a low distortion, high output power tube developed specifically for audio. Originally made for demanding military applications these ideal power tubes provide unrivalled sonic. Esto que planteas del acople directo es una arma de doble filo, por un lado parece razonable al eliminar toda intromisión en la señal por parte del del transformador entre-etapas o del condensador de acople, pero en ese caso eliminas los dos ventajas que comenta Konstantin, ajuste de impedancia y mantener la corriente constante en el driver bajando notablemente la distorsión. I power them with a cheap panasonic digital amp receiver. Topic author: Fuling Subject: Katodföljare i mammutstorlek Posted on: 2007/08/16 16:06:41 Message: Efter att ha gått i vaga funderingar i flera års tid har jag äntligen tagit mig för att göra vissa praktiska tester på en förstärkare med slutröret kopplat som katodföljare. Iam have spent 9 months with the sev 6550c, 1 month with the kt-90 and 1 month with the sev KT88 on my Jadis Defy 7 amp. He suggested I buy one of their…. 95 for each program. Har de 80H chokene liggende, så derfor planlegger jeg å bruke de. You could also do a EL84 or 6V6 push pull in ultralinear (Tubelab also has a PP board last time I checked). http://farm4. Pretty much anything that is pin-compatible with the EL34/6L6/KT88 family of tubes will work, as long as they can handle whatever B+ voltage you choose to run. Some really good candidates to take inspiration from are Mikael Abdellah's SE KT88 project which has got high accolades. jpg http://home. I took 2 weeks off over Christmas and built a chassis and cover for it. As you can see, I am running both channels off one rectifier tube. So, the design I went with belongs to George Anderson of Tubelab in the USA. The Tubelab SSE is a single ended amplifier. The tubelab board was very easy to deal with and the instructions he posts on his website are so easy to follow. Edcor output transformers and choke, with Allied power transformer. These fantastic boards were designed to be run as single ended amplifiers. Victor sent a fully assembled amp he had been listening to, plus the 20-page assembly manual in English and a huge collection of power tubes (the TU-879S ships with 6L6GC but also accepts EL34/6CA7, KT66 and KT88). Phillip at bluebell hinted he is working on some 4:1 SE interstages with hammond for a KT88 or 300b driver but i have not been able to get any more than that from him than that. Searches are limited to a maximum of 200 records. As promised in the preview, a prototype of the EL84 amplifier based on the Tubelab. I just had a few bits of walnut knocking around and had to make do with that. Here is my schematic with the necessary changes to make it push pull. Might see if I can get a motorised volume pot and input selector installed one of these days Though if doing that I'd go all out and have auto-biasing installed too. In conjunction with the 300V winding, the 50V winding will allow you to create 250V and/or 350V outputs (all voltages AC of course). I'll put them up in the FS/FT forum at some point soon. Topic author: Fuling Subject: Katodföljare i mammutstorlek Posted on: 2007/08/16 16:06:41 Message: Efter att ha gått i vaga funderingar i flera års tid har jag äntligen tagit mig för att göra vissa praktiska tester på en förstärkare med slutröret kopplat som katodföljare. Found total of 427 records, Query: kt77 in Tubes Asylum, Time: 0 sec. They make kt88, kt90, and kt100's now, I have a set of kt90's in my 32v3 that sound great. That project is known as the Tubelab SE Board. Been concentrating on the two kit amps offered by Tubelab, but have started to broaden my search after some of the posts in this thread. Tubelab SPP with Parallel 6HB6. I was thinking about building a tube amplifier for a long time myself and my search ended when I came across "Tubelab SSE" designed by Mr. tra le valvole poco utilizzate, e facenti tutte parte della famiglia della 6L6, ci sono sicuramente la 1624 e la 1619, entrambe a riscaldamento diretto, la prima UX5 uguale alla 807, la seconda metallica e con zoccolo Octal, entrambe sono appetibili per dei PP con OPT 6,5K e 10K pp rispettivamente, la 1619 a pentodo può validamente utilizzare un TU da 8Kpp per EL84, altra valvola di media. Without going to parallel, 10 watts demands KT88 or above. Tubelab SSE SSE for sale. You could drive the KT120/150 higher. The ideal primary impedance for this design is 5K ohms. Lets make a list of amps, tubes combinations and speakers been used with possible description of the results, just put as much as you can here, even the music you are listening/prefer. I power them with a cheap panasonic digital amp receiver. Re: Finished DIYed 2A3 SE amp « Reply #40 on: April 20, 2010, 15:55 » Normally, we try not to position the mains trans laminations parallel to that of the output trans and choke as the electrical field generated by the mains trans will affect the output trans and choke. hu-ról ide (is), mivel a csatolmányokat csak az ottani tagok látták eddig. He used some KT88 tubes which I don't have so I used some 6HJ5 tubes that I had. If you check it out the schematics are easy to find and simple. Audio power amplifier circuit High performance audio amplifier kits up to 140 Watts 140 Watt Audio Amplifier Using 6 Transistors 4 Simple OTL audio amplifier circuit using can build easy and cheap, It's durable and very loud sound , Not needed speaker Protection. This board is used to construct amplifiers from a basic low cost design to a high end triode mode amplifier. I thought to myself that sounds like a fun project. I'm interested mostly in what the effect is of dropping the grid leak resistor to 220k on the KT88? I've seen this value on TubeLab's Simple SE design for a similar amp. Audio Asylum - Search of All Forums - Enter your search criteria. Way back in the dx100 days I solid stated the vacuum rectifiers and installed the big VR tubes in their place to regulate the screen voltage. The ideal primary impedance for this design is 5K ohms. Recently finished building a Tubelab SE amp with 45's, at least built enough to use it. There is also George of tubelab. VTL REF 750 - Black for sale. Esto que planteas del acople directo es una arma de doble filo, por un lado parece razonable al eliminar toda intromisión en la señal por parte del del transformador entre-etapas o del condensador de acople, pero en ese caso eliminas los dos ventajas que comenta Konstantin, ajuste de impedancia y mantener la corriente constante en el driver bajando notablemente la distorsión.