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There is a document I just read which shows results of various testers based on a 12ax7 tube. It seemed that the 600a was the most consistent performer across the many 600a units tested, and accuracy to the lab tester results (RCA WT100A).See all results for this questionWhich Hickok tube tester should I buy? - Page 3 - 2 alltubetesters articles which tube tester should iDec 18, 2019 · the tester itself has to also be calibrated to that 2200 spec when it measures a new tube likewise, if the tester is set up to test a 100% NOS new tube to a 3100 mmhos spec, then the technician needs to know that going in, and judge accordingly. the tube tester shootout had testers calibrated to a variety of scales, 2200 mmhos, 3100 mmhos, and alltubetesters articles which tube tester should i5/5(1)Which Hickok tube tester should I buy? - 2-Channel Home alltubetesters articles which tube tester should iFeb 02, 2014 · I use a Hickok 539b that was fully restored by Roger Kennedy as my main tester. The more I got sucked into this vortex of looking for unusual vintage tube gear and experimenting with DIY using tubes, I realized that I should be looking for a tester that could test a wide range of tubes, wanted something that gave more accurate mutual conductance (Gm) readings that meant fixed Gm ranges Hey all you tube-heads. I need to tap into your thermionic emissions. I need your biased opinion. I am going to take the plunge and purchase alltubetesters articles which tube tester should iLook at the way I did, YOUR tube types, not 65 sockets you will never use. hickok is a great test unit. $300 to $450 tops, Ebay . Here is a list of tubes I currently have in my equipment. Is there a quick way to see what the lowest common denominator tester is based on this li alltubetesters articles which tube tester should iWhile I am not answering your question, I non the less wonder why buy a tester if you can get them tested by someone who already owns one. That's w alltubetesters articles which tube tester should iI live in Parkersburg, WV. There is only 1 person I know who owns one, and it hasn't been calibrated that he knows of. He is the ONLY electronics r alltubetesters articles which tube tester should i I always ask the seller to supply the list, then have a beer and compare. start with the cheap one, work your way up till you find one that m alltubetesters articles which tube tester should iOne of my tuners has a number of questionable tubes. Also, I have a couple of EL37's which I think might test well. If so, they could be worth $150 alltubetesters articles which tube tester should i I use a Hickok 539b that was fully restored by Roger Kennedy as my main tester. The more I got sucked into this vortex of looking for unusual alltubetesters articles which tube tester should iThere is a document I just read which shows results of various testers based on a 12ax7 tube. It seemed that the 600a was the most consistent perfo alltubetesters articles which tube tester should i It wasn't taken that way. Actually, Chris Haedt was a well-respected tube tester repaiman, but I believe that he passed away early 2005. Whil alltubetesters articles which tube tester should iShould I buy KPT 535 T for LCR?Jun 21, 2017Is a tube tester a worthwhile investment?Aug 31, 2015See more results
Dec 01, 2011 · For example, the popular and widely used 12AX7 tube should be tested on a tube tester with a lower grid signal. In spite of not testing every newer tube, a later model TV-7 in excellent condition may easily sell for $500 to $900. Sometimes more when an Some results are removed in response to a notice of local law requirement. For more information, please see here.What's a good tube tester? | MarshallForum alltubetesters articles which tube tester should iSep 11, 2010 · That's because most tube testers only put about 250V on the plates of power tubes. Today, there are two modern testers, the Maxi-Matcher and the Amplitrex-AT1000. Both of these are several thousand dollars each. I would recommend that you get a B and K tester in the 600 or 700 series. Some are full sized and some are very compact.Vacuum Tube Testers for sale | eBayHow are the Hickok 539B and 539C tube testers different? Hickok made and sold 3 different types of transconductance tube testers under the 539 brand. The B and C types have a few more additional features than does the A type. The Hickok 539B is known as the engineers model because it measures true transconductance in micromho units.
Jan 15, 2018 · http://www.alltubetesters alltubetesters articles which tube tester should i/articles/tester_guide.htm Also if you want to test tubes from the 6DJ8/6922/7308 family you will need a military tester like the TV-7. For some reason many testers can't handle these tubes.Tube tester alltubetesters articles which tube tester should ianyone own their own? | Audiogon Discussion alltubetesters articles which tube tester should iJul 19, 2020Tube recommendationsAug 19, 2018Tube tester recommendationsApr 15, 2008Search for tube testersFeb 21, 2005See more resultsTube tester help | QRZ ForumsJan 25, 2013 · In case you don't know, a tube tester should have a manual or chart with it that lists various tube types, which socket on the tester to use for which tube, settings for that tube. While that tester ain't the greatest, it is better than none, and if you are going to get off into old tube Hickok 538-A Tube Tester RestorationDec 28, 2017Best Tube TesterJan 31, 2011Tube tester data neededApr 17, 2010Help with TVIOct 26, 2004See more resultsTube Testing & How to Use a Tube Tester - TubeSoundWhile each tube tester has different capabilities and therefore different operating instructions, here are my thoughts regarding tubes, testing, and all tube testers in general. [new update Nov 2013:] I found an interesting article about the value of a tube tester to a service technician in the Feb-March 1957 issue of National Radio-TV News.
Jun 12, 2014 · Essentially this tester tests to find out if the tube is good or bad, does it have problems, and how strong the tube is if it's good. Check out the Hickok 539 or 752 Oldies that cost a lot. The new ones like maxi-matchers, cost a lot too, but give you total accurate values.Testing tubes without a tube tester??? - RadioBanterJan 25, 2004 · Dumb Question #1: How can I test vacuum tubes without a tube tester? Namely, 6AK6, 6BE6, 6HR6, and 12AX7. Not really a way alltubetesters articles which tube tester should iEither you can use a tester, or have others of the same tube to try substituting. Those tubes are fairly cheap for the most part. The 12AX7's probably the highest cuz the audio crowd has a high demand for them.Roger Kennedy of Alltubetesters alltubetesters articles which tube tester should iFrom what I understand, power transformers for tube testers would need to be custom-made, and the cost far exceeds the value of the testers. The same with some of the switches. Even the variable resistors are difficult to obtain.
(Roger Kennedy simply said that I would need an external transformer to test those tubes). He is also teaching me how to test other Russian tubes like the 6H30, 6C45, and 6C19, none of which can be found on any tube tester roll chart. He also designed and made a jig that allows me to test the 6C33C tubes in-circuit, in the amplifier.Orange VT1000 tube tester, How is it? | Rig-TalkJan 10, 2016 · Send it to alltubetesters. Roger is not cheap but does great lasting work and is an authority on tube testers. I think he even has machinery and can duplicate old parts that don't exist anymore. With this said, these testers will not match tubes. Some of them do offer matching, but it is at 250 volts which is useless to us guitar amp guys.My (never complete alltubetesters articles which tube tester should i) Tube Tester CollectionThe point in question now is whether the emission or transconductance test is the best.. This is determined in part by the circuit in which the tube is to be used, in case of an RF or IF amplifier tubes, the stage gain is proportional to the transconductance; for this the Gm test is the most important. In case if an output or power rectifier tube, it must be capable of supplying large amounts alltubetesters articles which tube tester should i
Your tube tester is often the first test instrument that you reach for when diagnosing problems in tube gear. All tube testers are a compromise in functionality, compromise in accuracy, and none are perfect. No models test for all tube characteristics.See all results for this questionIs it OK to use an old multi meter tester?I thought an old tube tester is like an old multi meter. Not very accurate, but when it works it is probably ok. Later I learned, the old tester was indicating too low value for all tubes, and perhaps these tubes were all fine. More later, I learned that many unserviced vintage tube testers indicate complete false results, and nobody realizes that.See all results for this questionHickok 534 tube tester repair question - narkive(typical calibration tube of choice) to set up the meter. It may not be as accurate as the original, but it will make the tester useful where it is not at present. With great care, you can also change the face from the Hickok meter to the Simpson meter. Peter Wieck Wyncote, PA Kutztown Space 338
The process parameters should be strictly controlled in sand blasting of alltubetesters articles which tube tester should i. The working pressure of abrasive chamber is between 0.5 and 0.6a, and the outlet pressure of air compressor shall not be lower than 0.6 WPa. According to the test results, the distance between nozzle and workpiece shall be controlled at 80 - 200 mm and spraying angle of 30 ~ 75°is appropriate.