Kt88 vs kt 90 bench test software

Based on our customer responses this kt88 tube definitely has the best bang for the buck of all the kt88 types. Electroharmonix kt90 the electro harmonix kt90eh tube is a dropin for any kt88 or 6550 tube. Iam have spent 9 months with the sev 6550c, 1 month with the kt 90 and 1 month with the sev kt88 on. Ive recently done some thd factor tests on the ei kt90 and jj kt88 in full power amp conditions and tabulated them graphically. I just had a chance to change out the kt88 tubes and replace them with the sovtek 6550we tubes and i definitly like the 6550 tubes over the kt88 tubes,the 6550 tubes sound more aggressive and they have this midrange highend thing that i really like over the kt88 tubes,the plate voltage that i measured on my ampvht deliverance d60h was 475 and i biased the tubes to a nice and toasty 58ma and. The stock st70s power transformer was really marginal with that amp and many old st70 power transformers have hum, buzz and vibration issues.

The cpu test has been redesigned to let processors with 8 or more cores perform to their full potential. Pp2012 kt88 hiend push pull amplifier audio design guide. I had that same question today looking for the 6550s in the tv7u test data booklet. Downloadable content for this softwarebrowse all 12. Yes, you could use a free software based signal generator to get going, there are. Up to 160w per pair may be achieved with anode voltage of 750v and screen grid.

I replaced 4 year old gold lion kt 88s with shunguang 50 years of treasures in my rogue m150 monoblocks and i love the sound. After many years designing single ended amplifiers i have decided to start a series of test about the push pull amplifiers. The best kt 88 on the market is tubes canuck audio. Sonically they are true to the electo harmonix brand. Georgia i cant find in any of my tube data the settings for testing a 6550kt88 on my tv7 bu tester. Kt88 uses a cp2102 chip made by silicon labs to to communicate with pc. Kt77 vs kt88 talkin tubes the klipsch audio community. Vacuum tube kt88, electroharmonix antique electronic supply. And this soft is very old probably written in late 90s, limited and may be. I had a marshall major with 6550s and it was only putting out about 6080% of its power rating because it was designed for kt88s. Hence its recommended that the kt be biased as had it been 25w although it would stand up to 32w, the kt66s is 30w max. Discussion in audio hardware started by libertycaps, feb 16, 2012. Kt88s generate a lot power, handling significantly more plate voltage than other power tubes.

Buy gemtune gs02 kt88 vacummtube amplifier with kt882, 6n8p2, 5z3p1. View online or download ensoniq kt 88 musicians manual, quick start manual. On the plus side it has 16 channels allowing for almost full 1020 eegqeeg recording, multichannel neurofeedback training, or brain machine interface research. These tubes are also ideal for amps that are looking to maximize their clean headroom, such as bass amps and guitar amps suited for metal players.

If a television arrived on their bench they could test all 27 vacuum tubes to see if they were serviceable within an hour. Thus the driver amp must be able to make the vac without its thd exceeding. Sign in to add this item to your wishlist, follow it, or mark it as not interested. The kt88 fits a standard eightpin octal socket and has similar pinout and applications as the 6l6 and el34. The 7581 has a plate voltage rating of 500 v35 watts 5 watts more than the 6l6gc and a screen rating. From what i hear, these tubes are interchangable on most amps it seems that the 6550 is the least loved tube of the bunch. When used at the parameters found in existing 6550kt88kt90. What are your favorite new production kt88 and 6550 power.

Shuguang kt8898 kt88 6550 new platinum match quad ebay. A pair of these tubes in pushpull configuration can deliver power levels of 150 or more watts. Showing the pete millet 8903b software in use as well as other tests. We should want to test the kt88 to see how it performs with signals. Oct 29, 2017 bg bench testing a chinese made cayin a100t kt88 amplifier. Object of the test to evaluate the sound quality and reliability of the new batch of 6550kt88 and compare against the best new old stock types for use both audio and guitar and bass applications. If your new st70 has an updated power transformer from triode or dynakitparts then kt88s are an option. Testing kt88 for customer satisfaction showing 6 of 36 messages. I am curious what you think of those ne kt88 tubes vs. If a television arrived on their bench they could test all 27 vacuum. Classa pushpull tube power amplifier electronics diy. It probably needs to be biased somewhat differently and may have a higher heater current than the kt88.

Kt90 bench test 2 attachments ive recently done some thd factor tests on the ei kt90 and jj kt88 in full power amp conditions and tabulated them graphically. The kt88 is a beam tetrode k inkless t etrode hence kt vacuum tube for audio amplification. The kt88 is a larger version of the kt66 that features higher power and very low distortion. 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. If your new st70 has an updated power transformer from triode or dynakitparts then kt88 s are an option. These specifications are provided asis, with no warranty of any kind. The kt90, or in full, kinkless tetrode 90, is a beam power tetrode and features the same octal socket as its smaller variant, the kt88. We create benchmarking software that helps you measure the hardware. Dec 29, 2007 the stock st70s power transformer was really marginal with that amp and many old st70 power transformers have hum, buzz and vibration issues. One or the other tube not predictable which one will start to conduct more than its fair share of the current. Kt90 bench test, richwalters, tubes valves, 4, 23rd. This electrical spec enables to design powerful amplifiers without parallel connection. Kt88s can take higher plate voltage and dissipate more wattage, so they are more powerful in the right circuit.

I have an ampeg svtcl with 6550 and its power tube distortion is brutal compared to my mesa bass prodigy 4. The srpp driver and sipp output work very well together. Each wound string is precision wrapped with round nickelplated steel onto a high carbon, hexagonshaped steel core. The kt 88 is considered as being the tubes with a very high power while. Looks like the jj kt88 is one of the only real current 88 tubes. The purpose of this kt88 kt66 6550 kt90 kt120 page is to give an overview about what kt66, kt88. Bg bench testing a chinese made cayin a100t kt88 amplifier.

I had a marshall major with 6550s and it was only putting out about 6080% of its power rating because it was designed for kt88 s. Jj kt88 matched pair the jj electronics kt88 has beautiful imaging and nice full bass response. With its wide range of benchmark tests, 3dmark has everything you need to test your pcs. Im rebuilding a set of bose 901s, series v speakers. The el34 is probably the narrowest of the medium glass octals. A volt meter across the test points should read in the 40200 mv range. 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. Specifically designed for audio amplification, the kt88 has similar ratings to the american 6550 which was designed for use as a servo.

At that time, i praised everything about the amp save for its excessive sweetness. Personally i wouldnt use kt88 s in an st70 with an original power transformer. If you have issues with your hardware, or if your cooling isnt up to snuff, youll find out in short order. Kinkless tetrode 90, is a beam power tetrode and features the same octal socket as its smaller variant, the kt88. Kt88 s can take higher plate voltage and dissipate more wattage, so they are more powerful in the right circuit.

As input tube i suggest to use the old 12ax7 jan philips or the sovtek 12ax7lps the to. Apr 19, 2017 no one can tell you what differences you may perceive. The jj kt88 has been around now for a good 7 years and has an excellent reliability record. As a result, kt88s and 6550s are produce cleaner tones and have low distortion, making it popular amongst bass amplifiers and high end audio applications. Asevtlana 6550c, sev kt88 and the kt 90 type 3 from kevin deal. Those tubes are generally run at different operating parameters so, other than assuming that some differences may be noted, its not possible to have a clue about what those differences may be without knowing platescreen voltages, bias, primary impedance of the opt, characteristics of the. Group b consists of kt88, kt90, 6550 and their variants. As a result, kt88 s and 6550s are produce cleaner tones and have low distortion, making it popular amongst bass amplifiers and high end audio applications.

Tv7 bu settings for 6550 kt88 antique radio forums. Electroharmonix kt88 vacuum tube high power kinklesstetrode for use in amplifiers such as the marshall major. This is a rare matched quad of type ii ei kt90 tubes. Jj kt88 matched quad the jj electronics kt88 has beautiful imaging and nice full bass response. The plain strings are made from the same high carbon steel as the hex cores. The kt90 is a vacuum tube used in audio applications. Anyway, we tested my mkiiis for gain and distortion before and after the mod on shannons test bench. Kt88 is one of the great power tube for high power amplifiers. Due to the high current and power capability of these tubes, it is very important that the kt88 tubes are well matched. It seems these chinese tubes are so much alike aside from smoked glass or grey glass, etc. Type ii is the best sounding and most desirable version of this tube, and can be identified by the numberous spotwelds on the plate structure. Thermion has a quad that has over 2000 hours and they test on his hickok as new. We dont know when or if this item will be back in stock.

Can be used in place of 6550 for a more round bass signature. I have no vested interest in psvane, shugang or grant fidelity nor were any of these tubes given to me. Kt90 page 1 of 5 the kt90 is a beampower pentode primarily designed for use in audio frequency power amplifier applications. The kt88 can be used interchangeably with its american rival, the 6550. Free and cheap software for benchmarking like a pro pcworld. The kt120 and kt150 are both pentode devices and the kt88 and kt100 are described as beam tetrodes so no, i wouldnt think these can be easily interchanged even though the data sheets have the same pinout. This chip essentially allows micro controller on kt88 to talk to pc as if it was connected using serial port but does it over usb interface. Bench test cayin a100t 8 x kt88 tube amplifier youtube.

Computer forensics and loopback test plugs for burn in testing. View online or download ensoniq kt88 musicians manual, quick start manual. It may therefore be used as a substitute, given appropriate rebiasing when used in pushpull configuration. This dropdown allows you to select a program maturity level. Electroharmonix kt90 the electro harmonix kt90 eh tube is a dropin for any kt88 or 6550 tube. The shuguang kt8898 tube is of the same construction as what we have sold as the gold aero and penta type tubes. It produces a nice warm bass response with plenty of depth and detail. Kt88 is a low distortion, high output power tube developed specifically for audio. Benchmarking can be an entertaining way to keep abreast of whats. This new driver stage can be used without changes in the pp2010 to get 50w. Writing your own soft for a really cheap eeg hardware engineuring. The 6550 could be likened to a hard vacuum 6l6 whereas the kt88 is a darker and stronger kt66, which is peakier and more compex sounding.

Use of these parameters shall be entirely at the users own risk. Kt88 s generate a lot power, handling significantly more plate voltage than other power tubes. Discussion in the workbench started by jd267, sep 20, 2014. The rubytad str is the same tube as the 6550 china tubes. I tested 15 year old kt88 and new kt88 to use them for my new single ended. I just had a chance to change out the kt88 tubes and replace them with the sovtek 6550we tubes and i definitly like the 6550 tubes over the kt88 tubes,the 6550 tubes sound more aggressive and they have this midrange highend thing that i really like. Those tubes are generally run at different operating parameters so, other than assuming that some differences may be noted, its not possible to have a clue about what those differences may be without knowing platescreen voltages, bias, primary impedance of the opt. Kt88 and kt120 power tube compatibility test, electrical. The kt88 is broader with less of a mid peak, the 6550 would be percieved as scooped. Home of the worlds best benchmarks and most popular performance tests including. The shuguang kt88 98 tube is of the same construction as what we have sold as the gold aero and penta type tubes. My question to the experienced is what is a good method for bench testing each of the 18 speakers.

Anode dissipation rate is 50w, which provides for pushpull amplifiers utilization up to 110w output per pair, with 550v on the anode. Personally i wouldnt use kt88s in an st70 with an original power transformer. Kt881016 is a 16 channel eeg device produced by contec medical systems in china and is currently one of the most affordable per channel eeg machine. Jun 07, 2017 bench test cayin a100t 8 x kt88 tube amplifier. What are your favorite new production kt88 and 6550 power tubes.