7591a tube comparisons tronola
7591a tube comparisons tronola
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7591A tube comparisons - TronolaWe drive the tube grid with a sine wave source to cause maximum plate voltage swing. The peak-to-peak value of the swing gives us the maximum power that one side of a push-pull pair can deliver. Test results from eight new Tung-Sol 7591A tubes, along with a reference NOS RCA and four EH 7591A tubes are shown in the table below.About Tronola · ST-70a Mods Article
tronola 7591a tube comparisons tronola Competitive Analysis, Marketing Mix and 7591a tube comparisons tronola
Get traffic statistics, SEO keyword opportunities, audience insights, and competitive analytics for Tronola. tronola 7591a tube comparisons tronola Competitive Analysis, Marketing Mix and Traffic - Alexa Log indiyAudio - 7591Apr 26, 2017 · +1 on Eli's comments. My experience: I purchased some JJ 5791 for a restoration of an old Ampeg Echo Twin Guitar Amp. My Avo MK3 Tube Tester quickly showed that have about 1/2 the gm of a "real" 7591 (the "real" 7591 used for comparison were some used RCAs).What is the difference between JJ 7591 and jj-7591a?The new manufacture 7591s fall short of true NOS by 11 to 32%. The JJ-7591S is substantially weaker than the EH-7591A. However, in a less demanding application like the ST-40, it might perform as well or better. The EH-7591A shows higher distortion and low tube tester gm.See all results for this question
7591 tube was originally introduced in 1959. It is a high output audio power tube that is flexible and easy to design with. Consequently, 7591 and its siblings were used in a vast number of home audio equipment in the 1960s. 7591 and 7868 have the same internals, and electrically they are the same.See all results for this questionWhat is RCA 7591A?RCA-7591A - RCA Coin-base, low-hours matched pair of known NOS origin. These were purchased new by Dave in the old days. 7591GM - GM Rebased NOS matched pair of 6GM5s. The 6GM5 has the same internal structure as the 7591A.See all results for this questionVacuum Tube Analyzer page2 - Tronola(The Tronola article on our build of the µTracer is here.) I only became aware of the uTracer in recent years. This small but powerful tube tester/curve tracer can be purchased as a partial kit for 225 (presently $272) including shipping. The builder must provide an enclosure, pin switching, a laptop-type AC adapter and a few other parts.
I own a 1964 Fisher Control (Integrated) Tube Amplifier. Previously, I would re-tube with NOS 7591 or NOS 7591A Power Tubes. And I was very happy with these tubes sonic. The 7591 family have been called low power KT-88s.Tung-Sol does it again! Introducing the new 7581A!Tung-Sol 7581A Vacuum Tube 7581A gets an A+. The 7581A was a tube that stood head and shoulders above a standard 6L6GC. There have been a few attempts to recreate this tube but it was never really accomplished. The 7581 that Tung-Sol has been selling is really a high grade 6L6GC and the tube store advertises it as such.Tung-Sol 7591A | vivatubes 7591a tube comparisons tronola - VIVA TUBES | Thousands New Plate Current Tested Tung-Sol 7591A Reissue Vacuum Tube . Built around the same specs as the original Tung-Sol 7591A, this is the perfect choice for those looking to replace tubes in their Scotts, Harman Kardons, Fischers, or any amp that calls for the 7591A. Thanks to the reissues, it is finally possible to get a reliably matched set.
Finally we have a 7591 tube that is a close replica of the original NOS tubes. If you have an old Fisher or Scott tube receiver, or other amplifier, the new reissue Tung-Sol 7591A power tube won't break the bank, and will keep them sounding great.5/5(4)Price: $33.95TubeDepot 7591a tube comparisons tronola | Analog InChoosing the right audio tube has never been easier. With real world comparisons and real world measurements, these ratings use up-to-date sampling to determine statistical performances. No hype, just truth. Your satisfaction begins here. +Tronola DIY Electronic Projects and MoreThe LH-7591A tubes have worked fine for the past year, providing high quality sound on my old stereo system, which I bought new in 1962. Then about a month ago, when I turned it on, there was a pop from the speakers and the system went quiet.
To my the best of my recollection, the 7591 is a 30watt tube where the 7591A is a 35 watt tube. I know they are both military grade versions of the 6L6 but there may be a difference is bias characteristics.Testing Power Tubes with Lab Eqmt - TronolaEquipment Required. Recently, the 7591 article was updated with coverage of the relatively new Tung-Sol 7591A.To get the power test data, I simply plugged the tube into a relay socket (left) and set up the lab test pictured below.Of course, most of the equipment in the picture isnt part of the test!Rectifier comparison and 7591a tube comparisons tronola - KCA NOS TubesRectifier comparison and interchangeability chart. 7591a tube comparisons tronola never assume that the power tube(s) is/are safe. ALWAYs check the bias and idle power of the tube with the new rectifier to be certain that it is running within spec. Increasing the cathode bias resistor is often necessary. 7591a tube comparisons tronola 7591A. 7868. 80. 801/801A/VT62. 8417. EZ80/6V4. Home. New 7591a tube comparisons tronola
Oct 22, 2019 · The stock tubes had a nicer sparkle and were a bit warmer, I suspect the NOS maybe wanted a bit hotter bias but rather than mess with it any further is was pretty obvious that adjusting the bias would at best get me a tone that was on par with the stock tubes, though most likely still not have the sparkle of the new prod tubes.New Tung-Sol 7591 Vacuum Tube Arrives!Nov 07, 2014 · In fact, chances are your old Fisher or Scott stereo receiver needs four new 7591A tubes to revive it to its former glorious sound! And if you own an old Ampeg Jet or Reverbrocket guitar amp, the Tung-Sol 7591-A is a fantastic option for these old treasures.GE 6L6GC vs GE 7581a/KT66 | The Gear PageApr 18, 2012 · tubes look (Westinghouse Premium AND GE 6L6GC) to the GE 7581A. Here is the picture of them that was on e-bay: B. BLUECASTER Member. Messages 584. Apr 18, 2012 #18 Blue Strat said: If the spacers for the 7581s are thicker (or ceramic versus mica) they would withstand more heat/power. Click to expand 7591a tube comparisons tronola
7591A / 7868 Tubes - Tubes for Ampswww.tubesforamps 7591a tube comparisons tronolaElectro-Harmonix Quad 7591A | vivatubes 7591a tube comparisons tronolaNew Plate Current Matched Quad of Electro-Harmonix 7591A Vacuum Tubes. The previously defunct 7591 model is back thanks to Electro-Harmonix. A smooth sounding tube with kick, the 7591A brings back a well-rounded design and sound that Ampeg owners will be happy to hear.EL34-family Tube Comparison! | Wall of Sound | Audio and 7591a tube comparisons tronola11 Comments on EL34-family Tube Comparison! Andrew // 2016/01/28 at 7:10 pm // Reply. Great review! Ive purchased lots of tubes from the Tubestore and am a fan of EL34s (and EL84s). Thanks. Tim Smith // 2016/01/29 at 5:53 pm // Reply. Thanks. Its a difficult job to compare tubes when they are all of such high quality.
For those who doubt the ability of the 6GH8A or 6U8A tubes to compete with the 7199, please take the time to read page 3 of the July 1990 Audio Basics Newsletter by Audio by Van Alstine. 6U8A tubes were also used by famous makers, like H.H. Scott, for exactly the same purpose (phase splitter) as they are in our PC-10A. They DO work well.Any opinions on 7591 vs. 7591A output tube set in a Fisher 7591a tube comparisons tronolaApr 14, 2013 · This was supposedly due to closely-mounted pairs of tubes adversely interacting with each other. I compared a Fisher-branded 7591 and a Sylvania 7591A and see that the plate structure is in the same position on both tubes. Has anyone seen a 7591A with the rotated internals? Sylvania 7591A on left in picture, Fisher 7591 on right.7591A tube comparisons - TronolaWe drive the tube grid with a sine wave source to cause maximum plate voltage swing. The peak-to-peak value of the swing gives us the maximum power that one side of a push-pull pair can deliver. Test results from eight new Tung-Sol 7591A tubes, along with a reference NOS RCA and four EH 7591A tubes are shown in the table below.About Tronola · ST-70a Mods Article
Dec 07, 2017 · Which is the best of the current production 7591As? E/H? JJ? The TungSol seems to be on hiatus, maybe. AES doesn't seem to have any, anyway.7591 tubes - tungsol reissue review | The Gear PageJun 16, 20157591 Technical Problem | The Gear PageMay 12, 2013See more results7591A / 7868 Tubes - Tubes for AmpsLooking for 12AX7 preamp tubes too? Feel free to check out our 12AX7 product page. 7591 Tubes. 7591 tube was originally introduced in 1959. It is a high output audio power tube that is flexible and easy to design with. Consequently, 7591 and its siblings were used in a vast number of home audio equipment in the 1960s. 7591 vs 7868 Tubes7591's for Fisher 500B - 2-Channel Home Audio - The 7591a tube comparisons tronolaSep 19, 2017 · Quick note. The SW 110 max output is 113db which is 32 watts for a single 280. The SW115 is capable of 121db which is higher than a 280 at rms of 150 watts or about 120db. Unless you stack the 110s, you will still have the 113db max. I do feel like
Shop our great selection of 7591A, 7868, 6GM5 vacuum tubes now. We carry all of the major brands in NOS, vintage and New Production vacuum tubes. Our tubes are always tested, matched and guaranteed. Visit us now!7591 | 7868 | 6GM5 Guaranteed Tubes for Sale - Shop our great selection of 7591A, 7868, 6GM5 vacuum tubes now. We carry all of the major brands in NOS, vintage and New Production vacuum tubes. Our tubes are always tested, matched and guaranteed. Visit us now!7591 vs 5881/6L6B | Telecaster Guitar ForumDec 09, 2011 · The highs had a signature sweetness, with softer and rounder mids. Both the Tung Sol 5881 and the JJ 6L6GC were brittle and harsh in comparison. It sounded like a completely different amp. I dont know if its an issue of new production vs nos tubes or what, but this is the best that this circuit has sounded to my ears.
Sep 12, 2014 · 7591/7591A 6L6/5881 Control grid (g1) Pin 6 Pin 5 Cathode (k) Pin 5 Pin 8 Other connections are the same. 7591A has two screen leads pin 4 and pin 8. If there connections on pin 8, move them to pin 4. B. Between the cathode of each tube and ground, install a 390 ohm 5 watt resistor. Parallel to that a 220 uF 50 volt capacitor.7591 conversion to 6V6 - Tube amp Information, Guitar amp 7591a tube comparisons tronolaJan 13, 2012 · +1 on keeping the 7591, per the datasheet it is best to keep the 2 screen pins externally connected. Man that is a great sounding tube. The EH new production also sound great compared to the worn out 1965 originals I have.