Sylvania 6sn7 bad boy review These were tested on my Dan Nelson calibrated TV-7B. This is the story of the so called "BAD BOY" On HiFi head there was a question put out on ’what was your favorite 6sn7’ tube. This new old stock-testing matched pair of milspec Sylvania Bad Boy JAN-CHS-6SN7GT tubes was tested on our Paul Hart-calibrated TV7/U for shorts, gas and transconductance. Post #3,880 of 7,513 Neogeo333 500+ Head-Fier. I had got good collection of Nos 6sn7 tubes. Seller Reviews (487) Similar Listings. Selling a 1954 Sylvania 6SN7-GTA tube with 270° angled black plates, large top getter, chrome dome, and extra tall base. Articles. They have 1953 date codes. These three holes plate Bad Boy are one of the best in the 6SN7GT family. I'm looking at one that has all the specified criteria except for the copper grid posts and the numbers on the side read: 0 1 The Psvane Hi-fi Series UK-6SN7 vacuum tube is a medium gain dual triode used optimally in any standard voltage amp circuit. The CBS Hytron construction is easy to identify: Clear Selling a 1954 Sylvania 6SN7-GTA tube with 270° angled black plates, large top getter, chrome dome, and extra tall base. Two Syl GT "Bad boy " made in 1952 10. Interestingly, all 4 have the same date code of Sylvania 6SN7GT/VT231 Tubes Sylvania 6SN7GT, Bad Boys, made between 1951- early 53) Raytheon VT-231 These 3 really get nothing wrong in terms of depth, clarity, bass and overall detail. T- plate, flash getter covered almost whole of short glass, full base (chrome dome) Hi all 6SN7 is beatiful tube, I have 6SN7/VT231 Sylvania 6SN7/VT231 Ken Rad black glass '42 6SN7 Tungsol mouse ears 6SN7GT Philips Miniwatt 5692 Sylvania I preferr 5692 the sound is sublime In this moment in my amplifier I use 7N7 , this tubes ('40-'50 years) is inexpensive alternative to Sylvania VT231. New Production Ugh. Do not pay for a bad boy unless it has the required 3 hole plate. Brand New. I could likely get about $1200-1500 for them. Often labeled with JAN-CHS (equals Sylvania-made military stock) The A is generally a taller bottle with the mica above the metal band while the W has the bottom mica a bit below the metal band. 8%) Pair NOS 6SN7 6SN7GT. These were tested on my Dan The M-60s require 4 6SN7 tubes per channel, with one of the 4 positions requiring a 6SN7 GTA/GTB tube. More like $15 each, on a As for the Bad Boy, if you let me brag a bit about them-, There was a 6SN7 expert who used spend time on this forum, he also bought and sold, the best of the best. See my reviews at Headphone. Bad boy ( Sylvania GT 3 holes made in 1952 or 1953) This one has good tonal balance (slightly bass heavy) which will work well with bright system. Black base, chrome top. 4%) Pair NOS 6SN7 6SN7GT. New items New comments Author list Series list Latest content Latest updates Latest reviews. I'm currently running a Sylvania 6SN7GTB to good effect in my Saga. 50 ($47. Tung Sol round plate and GTB. Important is only the spikes at the top mica to get that bad boy sound. I have 2 Sylvania 6SN7GTA bad boy shorties in the other section which still sound great after a heavy year of use, despite being 60+ years old. I have read some cautionary tales about Sofia tube's reliability but they mostly involved power tubes, so fingers crossed. Since the Saga is using the 6SN7 as a buffer, I think the differences between different 6SN7's will be more subtle than Sylvania USA 6SN7GT Black 2 Rivet T Bad Boy Plate TALL Vacuum Tube 87/97% Sylvania Review Subject Required. New articles New comments Latest reviews Author list Search articles. I have a quad of NIB red base GE 5692’s (RCA made) that I can’t wait to try as well, with several other JAN versions of RCA, Sylvania, etc. Anyone have an opinion or give me a description of their character ? The tall bottle Sylvania 6Sn7GTB is a better sounding tube than the short (standard) bottle version. this is what a bad boy is: 1)3 hole black T plates 2)Bottom getter flashing 1/3 way up the tube 3)shinny silver top and bottom rectangular mica. Seller Reviews (44) Similar Listings. Matched Pair 1954 Sylvania 6SN7-GTA Tubes For the 6SN7, I've used the Linlai E-6SN7 (not the china market model) and NOS Sylvania JAN 6SN7GT VT-231 2 Hole Bad Boy, Black Plate. Lower price! MATCHED PAIRS ARE $99. An extreme example of a tall bottle 6SN7 would be the Sylvania VT-231 while the opposite would be any 5692 tube. As I was writing Tung-Sol 6189 review, I got tired of it and plugged back the New articles New comments Latest reviews Author list Search articles. Fact 3: By the late 1960s, tube Bad boy ( Sylvania GT 3 holes made in 1952 or 1953) This one has good tonal balance (slightly bass heavy) which will work well with bright system. Note that the plates have 2 rivet holes, if there are 3 that's a real bad boy, and the sellers know this as a general rule and ask a lot more for them. Search. I've never understood the love for that tube. 50 off) CUSTOM FOR MATT Sylvania JAN 6SN7GT VT-231 Black Two Rivet T-Plates (like Sylvania "Bad Boy" type riveted T-Plates facing each other. Sylvania 6SN7GT 3 Hole Bad Boy, Black Plates, Well Matched (9. SYLVANIA 6SN7GT VT-231 2 HOLE BAD BOY FOIL PAN GETTER 1953 Sylvania 6SN7GTA ECC33 6SN7 Bad Boy Tubes, Matched Pair, NOS TestingThese tubes have 3 hole T plates and foil getters at the top. Six Rca gray glass gtb 9. Two Melz metal base 6n8s coming on May ( two more coming on June) 11. Originally $120, now $78 ($42 off) $120 Original price. Not quite as good as the more expensive "bad boy" Sylvanias, but Bad boy ( Sylvania GT 3 holes made in 1952 or 1953) This one has good tonal balance (slightly bass heavy) which will work well with bright system. The Sylvania 52'GT(bad boys) are beautiful sounding tubes and probably my favorites. On Sale. They have 1950 and 1951 date codes. Just ordered a Sylvania bad boy, rca grey glass from the 50s and a Tung I think that less coslty alternatives serve me almost as well. Willsenton R8 + Sylvania 6SN7 + MELZ 6SL7 + Mullard 6CA7 = fantastic value and the best I’ve heard the R8 sound. A getter is the silvery coat of pure barium metal deposited on the inside of a tube to ‘get’ (react with) free gas molecules within the tube, which would otherwise interfere CBS-Hytron was a high quality USA tube manufacturer, yet their production numbers were much smaller than the big name vacuum tube brands such as RCA, Sylvania, GE, etc. Pre-Owned · SYLVANIA (3) C $168. I had done shootout between TS BGRP, RCA vt231, KR vt231, I will have shootout between TS BGRP, RCA vt231, KR vt231, Syl vt231, Raytheon vt 231 and "Bad boy" next weekend. This was about 16 years ago. Log in Register. Top end air, Tung-sol round plates or Sylvania 6sn7w tubes. To start from the beginning, back in September last year I built myself a new headphone amp, which proved to be way better than expected, and so started the quest for better 6SN7 tubes. The original metal base Sylvania 6sn7w is generally considered to be their best but they never made an I have collected just about all the best 6sn7 over the years. Differs slightly in construction from ‘regular’ Sylvania rectangular top mica 6SN7GTs. Not all Sylvania 52 GTs are bad boys btw. ) Date Code: 54-17 = 1954; Bottom Getter Shaped Like A Square D; Clear Top Design; Hole In Bottom Guide Pin; See photos for test data chart. These tubes have black Bad Boy T plates and foil getters. Date codes are 326, 26th True NOS Rare Sealed Box Special Edition Star Series 6SN7 GTB Toshiba Japan ~ 2 Available Collectible HiFi / Unopened. with plate getter, with my Sylvania 1952 JAN 6SN7GT three rivet bad boys. 9%) Pair NOS 6SN7 6SN7GT VT231. Show More. Both tubes are coded F2M on their glasses and dated 305 on their bases. No wonder, these rival the RCA 5692 redbase in quality, and are just as scarce. Rare 1950 3 rivet Sylvania 6SN7GT black plate "Bad Boy". If we want I post photo of my tubes Sylvania 3-hole Bad Boy It is indeed a 3 hole/rivet Bad Boy. New listings New comments Search listings. At only $64. On sale is a matching pair of used vintage Sylvania 6SN7GT Bad Boy electronic tubes. Probably the safest bet in terms of synergy with different pre/amp designs. 1956/1958 Sylvania 6SN7GTB ECC33 6SN7 Chrome Top Tubes, Matched Pair, Tested, NOS. Tube One measured 77/74 and Tube Two measured 78/73 where minimum (65%) is 50/50. Tubes are coded C2M and dated 222. Comments Required. Price $190 + $5 Shipping. Syl Bad Boys are one of the most mislabelled tubes listed For Sale: 2 Sylvania JAN-CHS-6SN7GT 3-hole “bad boy” tubes. It’s very airy and musical (think Sylvania 6sn7 Bad Boy), solid bass and fantastic transparency with a very beautiful mid-range. Sylvania 6SN7GT 2 Hole Bad Boy, Black Plates, Well Matched (4. Seller Reviews (479) Similar Listings. I also like the early GTB around 1955-57 era. . Sylvania 6SN7GT 2 Hole Bad Boy, Black Plates, My favorite 6SN7's to listen to have been the Sylvania's: Bad Boy 3 -hole plate, 2 hole GT/231 black and grey plates, 6SN7W all versions. Five Tungsol 6sn7gtb 12. I'll update if any problems surface. Sponsors. $105. 3 Hole Bad Boy, Well Matched (5. New (Other) · SYLVANIA. But as I listened I kept feeling that it wasn't as "clear" sounding as my now reference MELZ Russian military hole-plate tubes produced. They have black T-plates -3 holes, Copper grids, Bottom getter, I am looking at the 6sn7 sylvania bad boy and multiple RCA - black base and either white or red letter. It's fine, not bad, but nothing special, to me. Same tube different label. The Bad Boy tubes are virtually identical to the military VT-231 from the early 1950s and are currently a less expensive alternative, but this could change as the Bad Boy fad catches on! A side note about Bad Boys, there 17 reviews for 6SN7 / 12SN7 Tubes. He seems to think people dismiss the 2 rivet tubes because of Bad Boy worship. 0%) Pair NOS 6SN7 Sylvania 6sn7 BAD BOY etc. or Best Offer. 00! SYLVANIA 6SN7GT VT-231 TOP FOIL GETTER 3 HOLE BLACK BAD BOY PLATE CHROME DOME TEST NOS++ MINTY VINTAGE 1952 On Sale. Voiced in circuit- Quiet with no noise or microphonics. The pre has two 12AT7 Sylvanias and two (new)Tung Sol 6SN7. 55. These were tested on my Dan Nelson calibrated Sylvania 6SN7GT 1952 “Bad Boy” Also JAN-CHS-6SN7GT Made only from late 1951 (‘1-48’ examples seen) to 1952. Tests NOS Sylvania JAN-CHS-6SN7GT/VT-231 Black 2 Rivet T Bad Boy Plate Tube; Sylvania 6SN7 MPN: 6SN7 Availability: Ships in 1 business day or less. If I get MELZ 6N8S 6SN7 Metal Base next week, then I will also include it in shootout RCA5691, Psavne Acme 300B, Psavne Acme 805 are also being used in Line Magnetic 508 amplifier. Search Head Gear. My prediction is that it will be even easier to find these 6sn7 tubes in the next few months or so with great bargain prices since the economy is slumping. Same as above but 3 holes on plate and spiked upp mica (6SN7 GT - Bad Boy) 3. Sylvania 6SN7GT Black Staggeted 12AX7-Style Plates, Well Matched (4. C $496. Sylvania 6SN7GT 1952 “Bad Boy” Also JAN-CHS-6SN7GT Made only from late 1951 (‘1-48’ examples seen) to 1952. Minimal print wear with 431/C4B codes. Getter: More accurately known as ‘getter flashing’. Originally $34. But it falls short of above The best treble I’ve heard is the 1952 Sylvania 6SN7GT “Bad Boys” ” Bass is tight and deep with some large drums sounding particularly The "Bad Boys" Sylvania 6SN7-GT was made from late 1951, week 39 ("1/39") to early 1953, week 13 ("3/13"). 95, now $24. org. Excellent testing and great sounding tubes! Close in Gm; balanced sections. As usual, I think this is the right place to ask this. Parts. Seller Reviews (147) Similar Listings. I've been shopping around for some 6sn7 tubes on ebay have found some great prices for the vintage ones from the 40s and 50s. Subscriber. I found using 3 (2 in my pre and 1 in the amp) of the same tube option to be a This is a well matched pair of Sylvania 6SN7GTA vacuum tubes. All Sylvania Bad Boy tubes are: 1. At This is the "Bad Boy" 6SN7GT Sylvania that has been getting much favorable press lately. New Listing 2, Sylvania 6SN7GTA, black, 3-rivet Bad Boy, chrome dome, match date pr2, 6SN7GT. Sep 13, 2018 A quad of 6SN7 TS 6SN7GTB in the Cary SLP-98 preamplifier and then Tung-Sol 12AU7 and 12AT7 in the Quicksilver Mono 120 tube amps, which have KT150 the top sonic echelon, sylvania usa has a long tenured history of incredible sound reproduction, revered by audiophilesreknowned data sheets, high build quality, and impeccable test processes, all w/ premium tube-era warm precious metallurgythese sonic stunner limited run 1951-1953 t 7. 1 with plasma tweeter. [6SN7W / 6SN7A / 6180] 10000hrs minimum life. Bought these tubes from a reliable tube dealer 6 months ago at which time they were tested using a Looks like a 3-hole 1952 Bad Boy to me. I now have some great vintage Sylvania tubes that are vastly superior. Just today, I got a World War II era Sylvania VT-231 for around $18. In the phono section, there are 4 RCA red base 6SN7's, all measuring 85/85, 85/85, 85/85, 85/85. zimbida Sylvania "Bad Boy"? 1953 6SN7GT with SYLVANIA 6SN7GT VT-231 2 HOLE BAD BOY FOIL PAN GETTER BLACK PLATE TEST NOS VINTAGE 1949. Re-labeled bad boys are known to exist. $78. Reactions: billyz. Pair of RCA 6SN7 "Please note that a many people are listing Sylvania "Bad Boy" tubes which, in fact, are not true Bad Boys, and are worth considerably less, and sound extremely different. Originally $150, now $120 ($30 off) $150 Original price. The Ken-rad VT-231 staggered plates have great bass and have more of an airy midrange than treble. 99 each, the Apos Ray 6SN7 Select vacuum tubes may deliver the dynamics and authentic sound you’ve been seeking. Shipping: Calculated at Checkout. Product Model: 6sn7gt: Feedback Received: 25 See details 100% Positive Feedback External Feedback: zimbida01 (370) PayPal: Verified . A first-class tube, kind of like a slightly more resolving RCA grey glass vt-231 character, but not near as bright and extended as my Sylvania 6sn7 tubes from 1953-54. They have matching 1950 and 1951 date codes. Note, I havent heard RCA Red Base 5692's yet, nor one particular kind of Tung Sol Id love to try. Seller Reviews (488) Similar Listings. S Pair of Sylvania Bad Boy 6SN7GT's relabelled as Westinghouse 6SN7GTB's . Save big on these Sylvania made Bad Boy tubes, that are made Octal tube preamp. Bottom mica looks like early sylvania I have a pair that are just Hytron labeled (no CBS). SOLD | View similar gear. T- plate, lower flash getter, full base (VT-231) 2. (Pretty expensive). Two "Later GT versions were in a medium glass envelope with a green label and blackplates with bottom getter, sometimes called the “Bad Boy” 6SN7, and are sought after for their excellent sonics. 1956/1958 Sylvania 6SN7GTB 1956/1958 Sylvania 6SN7GTB ECC33 6SN7 Chrome Top Tubes, Matched Pair, Tested, NOS. For 6SN7's: First: I prefer 1940's Sylvania 6SN7W (JAN-CHS-6SN7W). This Psvane UK-6SN7 is compatible with 6N8P and therefore can replace the latter and vice-versa. I need them! If I flipped the heaters around to use 12SN7 instead, I could use many different tubes. This is the "Bad Boy" 6SN7GT Sylvania that has been getting much favorable press lately. Both tubes test Selling a matched pair of 1954 Sylvania 6SN7-GTA tubes with 270° angled black plates, large top getter, chrome dome, and extra tall base. The tubes need not be of the same manufacturer and need not be matched. If there’s a Sylvania 6sn7 you like you can get it for less in a 7n7 with one exception. The Reference 6SN7 Sylvania 1952 "Bad Boy" 6SN7 GT tubes. CBS-Hytron 6SN7GT "Clear glass with Sylvania "Bad Boy" type riveted T-Plates facing each other" Known for warmth . Have the bottom D-getter, but 3 hole plates: Then another pair, same Hytron-only label, same bottom D-getter, but 2 hole plates. and not $300 each, either. Free from gas or shorts. 1950/1951 Sylvania 6SN7GT ECC33 6SN7 Bad Boy Tubes, Matched Pair, NOS, Tested. Used – Mint. Classifieds. Current Stock: anyone know if a sylvania 6SN7GT HAS to have copper grid posts to be considered a true "bad boy". The Sylvania 6SN7 GT 1950s bottom getter 'bad boy' style can be found at a decent price. 1953 Sylvania 6SN7GT ECC33 6SN7 Bad Boy Tubes, Matched Pair, NOS Testing, Matched CodesThese tubes have 3 hole T plates and foil getters at the top. Nice score! I was googling 6sn7 bad boy and this thread/post came up Apos Ray Tubes 6SN7 SELECT Vacuum Tube: Review. SYLVANIA 6SN7 GT VT231 JAN CHS TUBE 1943 TOUGH DOG PERFECT MATCHED SET NIB MINT. Flat plate, lower flash getter, full base 4. The only tube I never really sought after was the 5962 I have 2 pairs and gave away 2 more Yes I did. I had very bad experience with Sovtek's and Tung Sols. There were no shorts or gas. He had nothing else to compare his tube to. On sale is one used matching pair of Sylvania JAN CHS 6SN7GT electronic tubes. The 52 Bad boys were also produced in late 51 and early 53. 69. $68. By clicking 1950/1951 Sylvania 6SN7GT ECC33 6SN7 Bad Boy Tubes, Matched Pair, NOS, Tested. 02. Rare first run, 1950 C0M on glass and 039 on base. First, the Marconi and the Sylvania bad boys had very similar design and looked nearly identical except for the Sylvania VT-231 6SN7GT ECC33 Bad Boy Tubes - Platinum Matched Pair, NOS, TestedOne tube is NOS/NIB but they both test near equally. $42 off. Sylvania 6SN7GT 2 Hole Bad Boy, Black Plates, Well Matched (9. By. There are the best cheaper alternative, and can be picked up for a bargain. Both tubes have the Sylvania factory code or logo printed This is the story of the so called "BAD BOY" On HiFi head there was a question put out on ’what was your favorite 6sn7’ tube. But it falls short of above Hence, if you intend to use the 5692 as a drop-in for a 6SN7 in an amp running 6SN7 voltages and currents, be prepared to have your 5692 last no longer than a normal 6SN7 at best. Later GT versions were in a medium glass envelope with a green label and blackplates with bottom getter, sometimes called the "Bad Boy" 6SN7, and are sought after for their excellent sonics. Seller Reviews (543) Similar Listings. Sylvania. Tubes are just tested by a TV-2C/U tube tester, readings are 96/101 and 101/110 out of 100/100 Two Sylvania Bad Boy 6SN7 tubes (labelled Philco) for sale. Date codes indicate one tube was manufactured in 1950 and the other in 1951. Used I tried 4 different pairs of different makes and brands of 6SN7 tubes and the synergy with my MICROZOTL MZ3 Headphone Amp / Preamp / Integrated Amp with the Sylvania 6SN7GT Bad Boys and/or Sylvania JAN-CHS-6SN7GT Bad Boys are some of the best sounding tubes I’ve ever heard. 1954 Tung-Sol 6SN7GT ECC33 6SN7 Tubes, Matched Pair, Tested, Bad Boy Ok, if my memory serves me right, these are the Sylvania GT series: 6SN7 GT - 4 versions 1. Or more accurately, paragraph length impressions of various 6SN7 family tubes, because most of my tubes are 12 & 25V versions of the 6SN7. Made for the US Military and of vintage 1953 production. 9%) Pair NOS 6SN7 6SN7GT. 6SN7GT Sylvania Bad Boy Matched Pair Tubes Three 3 Holes NOS-Testing. Share Feb 3, 2014 at 1:09 AM 1950-1951 Sylvania 6SN7GT ECC33 6SN7 Bad Boy Tubes, Matched Pair, NOS TestingThese tubes have 2 hole T plates and foil getters. So far my perfect tube compliment is one Sofia blue 6SN7,two Sylvania 6SN7,four (new)Tung Sol KT150 power tubes in the amp. In the meantime, I was looking for a good pair of bang-for-the buck 6SN7 drivers. Seller Reviews (550) Similar Listings. $30 off. With the Freya, black glass Ken Rads in the gain stage followed by the 5692’s in the buffer is my favorite combo, and I use a Sylvania 6SN7 GT JAN (“Bad Boy”) from the early 1950’s in the buffer. Made by Sylvania, although they can be relabeled / rebranded by a number of other companies, like RCA, Philco, Westinghouse, etc. Tested on a Hickok 750 tester and pass gas and shorts test and measure as new. 1950's GE 6SN7GTA ECC33 6SN7 Tubes, Matched Pair, NOS Testing, Used – Mint 1950/1951 Sylvania 6SN7GT ECC33 6SN7 Bad Boy Tubes, Matched Pair, NOS, TestedThese tubes have 2 hole Bad Boy plates and foil getters. I have been in contact with Len of 6SN7 renown recently and will pose the question to him. Two Amperex 6sn7 made in Canada 8. Review: These are killer 6sn7gt tubes I remember liking PSVANE's 12xx7 series alot but can't seem to remember the sound. SYLVANIA 6SN7GT VT-231 2 HOLE BAD BOY FOIL PAN GETTER BLACK PLATE TEST NOS VINTAGE 1949. Originally $150, now $105 ($45 off) $150 Original price. These three holes plate military grade Bad Boys are one of the best in the 6SN7 family. Save big on these Sylvania made Bad Boy tubes, that are made and labeled for other brands. $45 off. Darker tonality with big bass compared to the predecessor Sylvania vt-231 and the later 6sn7gt designations. What's new Search. Seller Reviews (496) Similar Listings. Reverb has your back if your item is lost, damaged, or doesn't match its description. Since Freya use quad 6sn7 tubes. 95% + of these are from late 51' to early 53' Excellent Sound!! Sylvania JAN CHS 6SN7GT 3 holes plate Bad Boy Tubes for sale. I have a very big collection so I change them around from time to time. These are the ultra rare 3 hole Bad Boys that everyone is talking about! Both tubes test very close to each other. 1950/1951 Sylvania Brent Jesse, a widely respected , Classic Tube vendor, makes a broad and I think incorrect condemnation of Bad Boy hunting, citing that the 2 rivet bottom getter Sylvania 6SN7 GT is a great tube. Add to Cart. Price $225. So I finally settled on the Bad Boys. Price Drop. Originally $475, now $427. 2. These tubes are crystal clear, neutral and dynamic sounding. Three (3) rivet holes, black T-plates, 1952 date codes, bottom getter flashing. Gain Matched Pair Of RCA Easily one of the finest 6SN7 (or equivalent) ever made, it's right up there in performance with the likes of a Marconi B65 and a Brimar black glass. $120. I don't what year it was made. The top mica has three small triangular edges bent down on each side. But they're not for sale. Reverb Buyer Protection. Share Feb 2, 2014 at 10:33 PM. After some minor wiring updates and drilling out the smaller socket to accept the larger base, I installed an early Sylvania 6SN7 (not quite a bad boy, but close IMO, the best Sylvania are early to mid 1950s 6SN7 'Y' plate or stated other wise having two plates on an angle to one another, not opposed to each other. The so-called "bad-boy" doesn't even make my top five SYLVANIA 6SN7's, and it isn't in my top 20 overall. Both tubes have same structures with three holes plates. Standard 6SN7 Types: [6SN7GT] First designation of the 6SN7 tube type. They have matching 1953 date codes. 0%) Pair NOS 6SN7 6SN7GT. Search titles and first posts only Sylvania 6SN7 Bad Boy CBS/Hytron 5692 Brown Base Ken Rad VT-231 Black Glass . I received Tungsol Black grass round plate ans Raytheon Vt231 tubes today. Used – Excellent. As others have reported, I've found it advantageous to use different tubes in different positions as long as the left and right channels are symmetrical. I'd like to show you two couple of tubes, two Tung Sol 6SN7 GTB that are actually Sylvania made (I think from the 1960's) and a pair of Sylvania made JAN Philips 6SN7 GTA (I think from the 1970's or even the 1980's), I'm interested as usual in your opinons. ‘G’ = glass body & ‘T’ = short bottle. gadget73 junk junkie. Speaker will be Lansche 4. Tubes are just tested by a TV-2C/U tube tester, readings are 100/104 and 101/102 out of 100/100 and also sound tested without any issue. These are the real Bad Boy's with 3 holes and foil getters. The Bad Boy tubes are virtually identical to the military VT-231 from the early 1950s and are currently a less expensive alternative, but this could 1956/1958 Sylvania 6SN7GTB ECC33 6SN7 Chrome Top Tubes, Matched Pair, Tested, NOS Home. Base: black, green labels marked ‘2-XX’ (where XX is the week of the year) Glass: clear Sylvania Badboys 39th week of 1951 These tubes sound just the same like the praised 1952-53 3hole Badboys. First off was the GE Canada Tube Depot sent me a new one that was just as bad. Minimal print wear with matching 431/C4B codes. But it falls short of above vt231 tubes in tranparency with limited treble extension. I like 6SN7GTA that are I believe 1952 to 1954 era. SKU: BT8832 UPC: 6SN7 MPN: 6SN7 Availability: Ships in 1 business day or less. Have found Ken Rad and RCA to be good in systems that veer towards overly analytical. Base: black, green labels marked ‘2-XX’ (where XX is the week of the year) Glass: clear The Sylvania Tall Boy types have two triangular shaped plates facing each other mounted high in the tube, with either a top or bottom getter. 30-Day Return Policy. Used – Very Good. Shipping: Calculated at It’s very airy and musical (think Sylvania 6sn7 Bad Boy), solid bass and fantastic transparency with a very beautiful mid-range. Some new guy shows up and says ’his Sylvania 3 hole tube is a Bad Boy’ on his earphones. Home. The 7n7 tubes mirror the Sylvania 6sn7 tubes for the most part. Guru as well as Headfi. 2nd: Standard sylvania chrome top 6SN7 GTs (GTA/GTB etc). That was that. 95 (29% price drop) Tube Box 6SN7. His tag was Len, he also produced a picture that looks a great deal like the one used in this thread. Used – Mint Sylvania 6SN7GT 3 Hole Bad Boy, Black Plates, Well Matched (4. pfkr xjkboe ehwxa nnpc wtgdlnl vkrgh agpwadfuj grhnvvc afmok aiq mpmwp ajco tyqg depv etvgomu