Sylvania 6sn7 date codes Rating : 1. medium amplification] double-triode tube. Originally $150, now $120 ($30 off) $150 Original price. Genuine tubes can be denoted by having the 1578, Melz logo and date code acid etched on the glass envelope. Getter: More accurately known as ‘getter flashing’. 6SN7 Chrome Top Tubes, Matched Pair, Testing Great, Codes on base: 312 = Sylvania; Date Code: 5 13 = 1955; Triangular Black Plate Construction; Top Foil Getter; Tested On A Triplett 3444 Tube 1951 Sylvania 6SN7GTA ECC33 6SN7 Chrome Top Tubes, Platinum Matched Pair, NOS Testing, Matched CodesThese tubes have triangular black plates and foil getters at the top. Sylvania 6SN7WGTA, military, match date pair #4, 6SN7GT, 6SN7GTA eq. Since Freya use quad 6sn7 tubes. $25. They are good tubes but don’t sound like the Tung Sol 6sn7. For example 210 would be week ten Sylvania 1952 "Bad Boy" 6SN7 GT tubes. C Start date Nov 17, 2009; J. Code: F9H. $1,090. These tubes are one of the most famous and sought after 6SN7 tubes made because of their very realistic, 3-dimensional sound. TC Tubes Home > Popular Tubes > 6SN7 / 5692 tubes > Sylvania 6SN7GT - early ladder plates. Promptly shipped and very well packed. *****30 NOS pieces of SYLVANIA 6SN7 GTB,the same date code of "58-00-25". They are distinguished by 6SN7GT octagon logo on tall glass enclosures, bottom getters, green lettering on black bases, with a vertical 3 digit date code. (This tube has a date code of 152, representing the 52nd week of 1951. The date code is 822, or 1968, the 22nd week. Have the bottom D-getter, but 3 hole plates: Then another pair, same Hytron-only label, same bottom D-getter, but 2 hole plates. Code: Year of production: 1965. 95! Availability:: Currently Unavailable Product Code: SYL-6SN7GTA. Matched pairs can be found as low as $59. 00 SYLVANIA 6SN7-GTA CHROME-TOP Stereo/Audio Tubes NOS SAME DATE CODE Matched PAIR! - $157. 1951 Sylvania 6SN7GT ECC33 6SN7 Flat Plate Tubes, Matched Pair, NOS Testing, Matched Codes, "Rare" Used – Mint. 4 in stock. 312 is Sylvania 188 is GE hey, no triangle plate Sylvania 6sn7. Although the 6S-series tubes are often metal-cased, there was never a metal-envelope 6SN7 (there being no Tubes: our philosophy. They have matching 1953 date codes. “Oh it was gorgeousness and gorgeosity made flesh. The plates are black Base: black, green labels, triangular Sylvania logo with ‘lightning bolt’ through logo. 2 / 20. Tipologia: 6SN7 WGTA. 1st) NO SHORTS,NO GAS AND WELL-BALANCED TRIODES IN TRANSCONDUCTANCE & PLATE CURRENT(PLATINUM MATCHING). More questions ? Tip a friend. Sponsored. But recently I got ****t Freya pre to tame the hot sound of Raal Sr1a headphone. These are mid to late 1940s vintage, among the best 6SN7 types ever made, and are in very limited supply. Ken-Rad JAN-CKR 6V6GT VT-107 *****SELLING WORLWIDE***** >>>>SYLVANIA 6SN7 GTA,same date code ,NOS,PLATINUM MATCHED PAIR (well-balanced triode-triode & tube-tube in transconductance & plate 6SN7 GTB SYLVANIA Nos Rare "Same Date Code " Platinum Matched Quad - £220. 1968 Date Code Matched Set of 12x Sylvania 5963 [Industrial 12AU7] Vacuum Tubes; We have hundreds of these in stock all with the same date codes and we are selling them in sets of 12. Skip to main content. SYLVANIA 6SN7 GTB tall bottle tubes Review: Comparison of 5751 Tubes Rayt 1. carusoracer. Are made between very late 1951 and very early 1953. Honestly, I'm not worried about the date code. 3-20. SYLVANIA 6SN7 WGTA. These tubes were tested on a Hickok 539C where the minimum reading is 1640gm and the reading for a new tube is 2523gm or better. For gain tubes: 1) ken rad 6sn7 black or clear glass 2 tie) National Union black glass 6sn7/ tung sol round plate black glass 6sn7 3) RCA gray glass 6sn7gt 4) tung sol clear glass 6sn7 5) Raytheon 6sn7/vt-229 6SN7 GTB SYLVANIA NOS RARE "SAME DATE CODE " PLATINUM MATCHED QUAD TV7 (#145601787698) r***o (421) - Feedback left by buyer. FOR SALE! TALL GLASS,PREMIUM QUALITY. TUBE TECH They were made by Toshiba for Lafayette Electronics (remember them?) and have matching 1966 date codes. the famous Sylvania "Holy Grail" of audio pre-amp 126303166347. Have the bottom D-getter, but 3 hole plates: Then another pair, same Hytron-only label, Find great deals on eBay for 6sn7 Sylvania. I am definitely not an expert, but I think your date code is the first week of ‘53. Menu. Sylvania 6SN7-GTB Chrome-Top Stereo/Audio Tubes NOS DATE CODE ‘CC’ Matched PAIR! Debi's Vintage Electronics Boutique (2776) Product Code: SYL-6SN7GTB. Originally $76, now $60. Member. Qty: Description 6SN7-GTA 1950'S NOS The Reference 6SN7 Thread Home. Great. There are a number of B65s branded by Osram or GEC, but they were all made by MOV if I recently bought some Sylvania 6SN7GT's which are tall bottle with heavy top flashing, green print on base. 5. Forums. New (Other) $66. Start date Dec 5, 2006; Tags Have a look at the EIA codes on the tube - a 3 digit number should indicate the tube's 'true' manufacturer. javimm New Member. $94. I have two different versions. Minimal print wear with matching 431/C4B codes. For example, we know that The article provides examples of Sylvania-manufactured tubes. There are different versions though. This Would anybody have infos on this Sylvania 6SL7 date code PC>Musicbee> Burson Conductor Dac/Amp/Preamp>Wyred4sound Dac2 DSD>WooAudio 22> > Civilian 6N2+GU32 HP/Speaker Amp>Grado RS2E>Lawton Audio modded Denon D-5000 >Denon AHD-1001>KOSS KPH30iK>HyperXCloud 2> Restored Quad 33 preamp,with restored Quad 405 Get the best deals on Sylvania 6sn7 when you shop the largest online selection at eBay. Full Member; Posts: 992 » Systems; Sylvania 6SN7W Date codes? « on: 10 May 2013, 04:48 pm 6SN7 GTB SYLVANIA Nos Rare "Same Date Code " Platinum Matched Quad Tv7 - $435. Caution! Willsenton R8 + Sylvania 6SN7 + MELZ 6SL7 + Mullard 6CA7 = fantastic value and the best I’ve heard the R8 sound. from United States. (This tube has a date code *****SELLING WORLWIDE***** >>>>RARE SYLVANIA 6SN7 GTB,NOS,Same date(522) codes,PLATINUM MATCHED TRIO (well-balanced triode-triode & tube-tube in transconductance *****SELLING WORLWIDE***** >>>>SYLVANIA 6SN7 GTB,same date code available,NOS,PLATINUM MATCHED PAIR (well-balanced triode-triode & tube-tube in transconductance The 312 EIA code indicates that this was made bySylvania for Magnavox. for sale! (tubes are supplied in white bulk box. 04. Within 7% or less triode-triode and tube-tube. Chrome Top with 5-hole plates. Date Code MM. 29. Brimar 6SN7, la migliore mai sentita, grazie. Shop by category. Shop by category Tested Sylvania 6SN7GT Tube Date Code 2-39 Sylvania 6SN7 GT Tube Green Logo. First Style of capital letter date code, 1954-1962 2. (1) Tested Magnavox 6SN7GTB Tube Sylvania Date Code 312-513 Magnavox 6SN7 GTB | eBay Skip to main content The consensus seems to be that the 6f8g and 6sn7 round plate black glass are the same thing. New Old Stock White Box. Home. Pre-Owned. You can look up an RCA date code reference sheet to match codes to years. 00. These were tested on my Dan Nelson calibrated TV-7B. Free shipping on many items | Browse your favorite brands Tested Balanced Silvertone 6SN7GTB Tube Date Code BJH 6SN7 GTB Tube. Look for a vertical three digit code next to the triangular Sylvania logo. Price: $69. The date code is 752, or 1967, the 52nd week. vt231 6sn7 Sylvania nos tube badboy black plate preamp tubes 1950's matched pair. TUBES ARE SUPPLIED 143395297531 6SN7 GTA SYLVANIA NOS "same date code" PLATINUM MATCHED PAIR C5/8A Get the best deals for Sylvania 6sn7 Tube at eBay. Add to Cart. Sylvania 6SN7GT version #1 Also JAN-CHS-6SN7GT Identical to VT-231s except: - Green printing seen on black base; white labels are much rarer. Last edited: They have 1960 date codes. The private party included it when I purchased the amp. These are the only Sylvania 6SN7 tubes made without the triangular shaped plates. Excellent communications from seller A+++++ 1950/1951 Sylvania 6SN7GT ECC33 6SN7 Bad Boy Tubes, Matched Pair, NOS, Tested. 9-19. Availability: no. Shipping: Calculated at Checkout Matching Date Codes? Yes Plate Construction: Black 2 Rivet T Bad Boy Getter Construction: BEWARE OF CLONED/FAKE RUSSIAN MADE SYLVANIA 6SN7'S. 7 Sylvania. It's Western Electric 396A (it's a dual triode I think) - it looks brand new, the only other numbers that look like a date code are 152. 80 (20% off) $76 Original price. The right one with date code 231 is not working very well but still functional normally, but I may not recommend you buying that. All. Does anyone know how to decode Brimar/STC date codes? Would anybody have infos on this Sylvania 6SL7 date code PC>Musicbee> Burson Conductor Dac/Amp/Preamp>Wyred4sound Dac2 DSD>WooAudio 22> > Civilian 6N2+GU32 HP/Speaker Amp>Grado RS2E>Lawton Audio modded Denon D-5000 >Denon AHD-1001>KOSS KPH30iK>HyperXCloud 2> Restored Quad 33 preamp,with restored Quad 405 sylvania platinum matched quad 6sn7 gtb nos same date code tv7 tested - £198. As reference for the GE date codes, both as labeled on the base (if there) and the dotted codes: 6SN7WGT Sylvania brown base long "T" black plate pair Mu 20. I saw date code 226 and I thought, really well that's a little bonus? I do plan on getting some other 6SN7s like the chrome domes you mentioned, just to get some others for comparison and backup purposes. Military OEM Service and Replacement 1946 1950 1954 1958 1962 1966 1970 1974 1978 1982 1986 Military Green No Logo Green OEM Continue 3 Digit Code 1986 Philips Blue What are the date codes on those? While the 6sn7 and 12sn7 are the same tube, I read that they need different voltage circuits, 6v vs. 20% off. 6SN7 GTA SYLVANIA NOS PLATINUM MATCHED QUAD same date code TV7tested | eBay 4pcs 6N8S 6SN7 ECC32 6CC10 USSR Triode Tubes Same Date Code 05-1973 NOS. Item Number: 369. Product features. , same date code / batch . 1960/61 CBS 6SN7GTB ECC33 6SN7 Short Bottle Tubes, Matched Pair, NOS Testing. They have 1950 and 1951 date codes. Like all the other loctals I've seen there aren't any manufacturer or date codes. 1970's GE 6SN7GTB ECC33 Tubes, Matched Pair, NOS/NIB, Tested, Matched Codes. Pricing & History. 00: AZ Jul 15, 2024: 15 : FOR SALE: 6SN7/ 12AU7/ 5963/ EZ81/ EF86/ 6X4WA / 6K6 tubes 1960 RCA 6SN7GTB ECC33 6SN7 Tubes, Matched Pair, NOS TestingThese tubes have black ladder plates and D getters. William Zapata (verified owner) Sylvania 6SN7W Date codes? 0 Members and 1 Guest are viewing this topic. 2 Manufacturer and factory: Sylvania. 1 6SN7GT BENDIX Black Glass HiFi Amp Vintage Vacuum Tube Code 50-26 SALE! Opens in a new window or Like just about all American loctals, Sylvania made these regardless of the brand on the tube. An extreme example of a tall bottle 6SN7 would be the Sylvania VT-231 while the opposite would be any 5692 tube. 41. FOR SALE! Pair of Sylvania 6SN7-GTB 3-hole black plate CHROME-Top Audio Tubes in great 116051850657 Sylvania RCA Tung Sol Round plate Required products; MATCHED PAIR of late 1940s/ early 1950's closely, matched early production RCA 6SN7 twin-triode tubes. Brand: SYLVANIA Type: 6SN7 w Manufacturer and factory: SYLVANIA usa. Drop-in compatible replacement for most any circuit calling for glass or Can you help me decipher the date codes of these two Sylvania 6SN7GTB? Thanks! Cans: ZMF Auteur Blackwood LTD, Beyerdynamic DT-250, Pioneer SE-A1000 I even had a 1954 version in the 6sn7 equivalents I sent to SYLVANIA 6SN7 WGTA › Wishlist. A difference in presentation, between your channels, is almost certain to result. Joined 1951 Sylvania 6SN7GT ECC33 6SN7 Flat Plate Tubes, Matched Pair, NOS Testing, Matched Codes, "Rare"These tubes have black flat plates and foil getters. 95. 80. Conditions: NIB NEW IN ORIGINAL BOX. There are Do any of you 6SN7 aficionados know if the above are any good sound-wise? Sylvania JAN 6SN7WGTA, late 1970's . all the tubes have two-digit date codes arranged vertically as Your tube is the Military version of 12AU7 and if it follows numerical code of similar tubes manufactured in 1950's and 1960's, the "67" is the year and "27" is the week. There are round plate 6j5gt tubes labeled Tung Sol but they are actually Sylvania tubes. Matching date codes. On Sale. Can anyone help me id the year of this Sylvania 6SN7GT (date codes: 939 and J8A)? I thought it was 1959, but then I read somewhere that 6SN7GT's were already phased out by then. Opens in a new window or tab. These are codes often seen stamped on components If you can, get an early 1940's vintage of this tube. This is a very different sounding tube compared to a lot of Sylvania 6SN7 tubes from 50s and 60s. Three (3) rivet holes, black T-plates, 1952 date codes, bottom getter flashing. Past 6 months. Explore. Quantity: My favourite 6sn7 tube is the Melz 1578 t-plate getter with the 5 side port holes. item 3 NOS SYLVANIA 6SN7-GTB CHROME-TOP MATCHED TRIODE BLACK PLATE CARY SLP-05 ONE-TUBE NOS SYLVANIA 6SN7-GTB CHROME-TOP MATCHED QUAD SYLVANIA 6SN7 GTA,FULL BASE,97-99% PRINT VISIBLE. PM me photos if you like and do your best to photograph or read the date code in the Melz logo if you see it. Sylvania "Bad Boy"? 1953 6SN7GT with Heavy chrome flashing, 3 hole facing black T plate, $110 one labeled Motorola with Sylvania Manufacturer code and matching construction and date codes to Sylvania Branded N015 Sylvania 6SN7GT: 98/92 N016 Motorola/Sylvania 6SN7GT: 95/98 6. US This supposed early 1950s Sylvania 6SN7 GTA is much different internally than ones I have, or have seen. C $174. Look for a vertical three digit code next to the 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. The whole concept of the "Bad Boy" is ridiculous. Code: E2B 351 - A7B. 6SN7 GTB SYLVANIA NOS RARE "SAME DATE CODE " PLATINUM MATCHED QUAD TV7 (#145601787698) r***o (430) - Feedback left by buyer. I've got 9 (one blew up) 6dn7 tubes with dotted code on them. Year of production: 1952 one of the most sought after versions of 6SN7 produced by Sylvania with chrome flash getter. why same tubes have different prices. I also got two Tungsol labeled tubes: Old Sylvania 6sn7 had extensive getter flash all down the sides when it was at the top. is the Sylvania (Chrome Dome 6SN7) I've tried the Shuguang Treasure CV-181, but it was too bright for me. Matching date code 1959. Code: . Qty: Description 6SN7-GTA 1950'S NOS Bottom mica looks like early sylvania I have a pair that are just Hytron labeled (no CBS). I've bought pairs that were identical in appearance/internal structure, but labeled differently(ie: Sylvania 6SN7W/6SN7A), and had differing date codes, but were perfectly matched in sound and electrical measurement. Type: 6SN7 WGTA. Manufacturer: Sylvania. Excellent communications from seller A+++++ I'm really new to the 6SN7 game, I sort of lucked into getting that Sylvania I have. Some labeled GE and some labeled RCA. 3. PicClick USA & International; PicClick Australia; PicClick Canada; Tests NOS Date Matched Pair Sylvania 6SN7GT Black Plate METAL BASE Tubes; Sylvania 6SN7 MPN: 6SN7 Availability: Ships in 1 business day or less. PRICE FOR TUBE PAIR . Sylvania? and what would the date codes be , any help would be much appreciated. $30 Matched Pair, NOS, Tested, Matched Date Codes. Structure's features: Metal base "CHROME TOP". Jul 10, 2011 #11 Stephen J said: Breaking the Sylvania Date Code Structure Paul Hart MAARC December 20, 2020 Brief Review of the Code(s) Sources for Information. Skip to main content Shop by 6SN7 GTB SYLVANIA NOS "SAME DATE CODE " PLATINUM MATCHED QUAD TV7 tested #2. This info was reproduced from Triode Electronics' website located at Commonly Seen EIA Codes. Interestingly, all 4 have the same date code of 1950-1951 Sylvania 6SN7GT ECC33 6SN7 Bad Boy Tubes, Matched Pair, NOS TestingThese tubes have 2 hole T plates and foil getters. The 6SN7GT is an octal base medium-mu (20) [i. FOR SALE! Pair of Sylvania 6SN7-GTB 3-hole black plate CHROME-Top Audio Tubes in great 126245150961 6SN7 GTB SYLVANIA Nos Rare "Same Date Code " Platinum Matched Quad Tv7 - $435. The term “Bad Boy” is often misused and applied to a variety of Sylvania 6SN7 tubes. Find great deals on eBay for 6sn7 Tube Sylvania. COME TESTIAMO LE VALVOLE: OVVERO PERCHE' VALVOLE IDENTICHE HANNO PREZZI DIVERSI ? Marchio: SYLVANIA. Manufacturer and factory: SYLVANIA USA. 7-20. DATE CODE ON SYLVANIA TUBE. k. Used – Mint. Selling a matched pair of 1954 Sylvania 6SN7-GTA tubes with 270° angled black plates, large top getter, chrome dome, and extra tall base. They have been tested for shorts, gas, and transconductance 1956/1958 Sylvania 6SN7GTB ECC33 6SN7 Chrome Top Tubes, Matched Pair, Tested, NOS. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Skip to Sylvania 6SN7-GTA Chrome-Top Stereo/Audio Tubes NOS DATE CODE ‘BA’ Matched PAIR! Opens in a new window or tab. FOR SALE! Pair of Sylvania 6SN7-GTA 3-hole black plate CHROME-Top Audio Tubes in great 126216083011 Like just about all American loctals, Sylvania made these regardless of the brand on the tube. Sylvania JAN Start date 2013-07-06 9:36 am; Status Not open for further replies. $76. Tung Sol didn’t make a 6j5 with the same plate. Buy It Now. 00 Find many great new & used options and get the best deals for Sylvania 6SN7GTA Vintage Tube & Tube Socket at the best online prices at eBay! Free shipping for many products! Octal Tube Socket Bakelite 6P3S-E 5881 6L6 6SN7 PL8-2P USSR NOS 18 pcs 8 pin Octal Tube Socket Bakelite 6P3S-E 5881 6L6 6SN7 PL8-2P USSR NOS. Pre-Owned · SYLVANIA. Also, is there a guide for lettered This supposed early 1950s Sylvania 6SN7 GTA is much different internally than ones I have, or have seen. 14-Day Return Policy. hmb3823 6SN7 GTA SYLVANIA NOS SAME DATE CODE TALL GLASS PLATINUM MATCHED QUAD. What I found interesting was Now, you will see the same date codes on 1940's Sylvania production (and 1930's production, as well), so a little detective work might be necessary. Rated 5 out of 5. Sylvania 6sn7 wgt give vivid sound with sharper focus while RCA vt231 give more relaxed sound. Structure's features: military spec, ring top getter, black plate, triple mica. Get the best deals on Sylvania 6sn7gt when you shop the largest online selection at eBay. NOS 1950's SYLVANIA 6SN7 GTA black-plate CHROME TOP MATCHED PAIR : Alternative $ 229. The only other tube is as revered is Tung-Sol round plates. $60. a. igolioto (16,787) 100%. 84 shipping 5. Thanks! Get the best deals for sylvania 6sn7 metal base at eBay. Sam Cogley Last of the Time Lords. They have matching 1950 and 1951 date codes. There are round plates on the top and bottom with one slot and two holes, and these plates block the getter. 5) sylvania 6sl7gt 6) tung sol clear glass 6188/6su7gty 7) RCA clear glass 6sl7gt My favorite 6sn7 favorites are different than this list. Sylvania 6SN7GT - early ladder plates. PicClick USA & International; PicClick Australia; PicClick Canada; 1. They have been tested for shorts, gas, and transconductance. These are often regarded as the best 6SN7 ever manufactured! Where most 6SN7 have a wooly sounding tone, 1950/1951 Sylvania 6SN7GT ECC33 6SN7 Bad Boy Tubes, Matched Pair, NOS, TestedThese tubes have 2 hole Bad Boy plates and foil getters. It was in a big box of about 200-300 tubes I several RCA black plate 12AX7's, several RCA black plate 6CG7's, some Sylvania 6SN7's (with the black triangle shaped plates) and assorted Get the best deals for Sylvania 6sn7 Tube at eBay. I received Tungsol Black grass round plate ans Raytheon Vt231 tubes today. e. 50 Free shipping. It The Sylvania EIA code is 502. ) The first digit of the date code represents the year, and needs to start with a 1, 2 Bottom mica looks like early sylvania I have a pair that are just Hytron labeled (no CBS). $120. The 614 EIA code is for Simpson Electric. Equipment 322407-3 code (really cheap) I also have a Tall Boy 6SN7GTB? (with a date code of 322HR3) I take the 322 is triangular logo and codes stamped in green ink. Medium glass envelopes. Structure's features: military spec, triangle plates, backelite base. The 5% figure is a good one. Sylvania "Bad Boy"? 1953 6SN7GT with Heavy chrome flashing, 3 hole facing black T plate, $110 one labeled Motorola with Sylvania Manufacturer code and matching Listings Similar to Sylvania 6sn7 GTB organ grade same codes. Made for 1966 Sylvania 6SN7GTB ECC33 6SN7 Chrome Top Tubes, Platinum Matched Pair, Matched Date Codes. I have Melz and Foton from 50s and 60s. Also, is there a guide for lettered date codes for Sylvania tubes? I found a reference guide for RCA tubes but came up empty for Sylvania tubes. C $21. Third style, serif format used until 6SN7 variants included the British mili tary CV181 and CV1988, plus the long- defunct MOV B65. All tube are in numbered plastic bags to avoid rubbing off labels with tube test results of Gm & Ip on each bag,Tubes we *****SELLING WORLWIDE***** >>>>SYLVANIA 6SN7 GTB,same date code ,NOS,PLATINUM MATCHED PAIR (well-balanced triode-triode & tube-tube in transconductance & plate SYLVANIA 6SN7-GTB CHROME-TOP Stereo/Audio Tubes NOS DATE CODE ‘EB’ Matched PAIR! - $135. Don Sachs Valhalla Integrated Tube Amplifier. Brand: SYLVANIA. Sylvania 6SN7 GTB for sale. SYLVANIA 6SN7-GTA CHROME-TOP Stereo/Audio Tubes NOS DATE CODE ‘BA’ Matched PAIR! - £91. $6. 6SN7 - 5692 - 6F8G - 6H8C; Tests NOS Sylvania USA JAN-CHS-6SN7W Black Plate Chrome Dome S-Rods Tube; Sylvania Tests NOS Sylvania USA JAN-CHS-6SN7W Black Plate Chrome Dome S-Rods Tube Visible Date Codes: H5 Lettering Condition: 75 Percent Number of Mica Spacers: 2 Mica Spacer Shape: Winged Triangle Glass Coating: Chrome-Half Both tubes were Sylvania-manufactured. FOR SALE! Pair of Sylvania 6SN7-GTA 3-hole black plate CHROME-Top Audio Tubes in great 126216083011 Sylvania 6SN7 circa 1950's white label with leaf insignia - very similar tooling to the VT231, but without the price tag! Nice warmth and ambiance. The only “true” Bad Boys were manufactured by Sylvania between 1951 and 1953. Find many great new & used options and get the best deals for (1) Tested Sylvania 6SN7GTB Tube Date Code CJ Sylvania 6SN7 GTB Hickok Tested at the best online prices at eBay! Free shipping for many products! (1) Tested Sylvania 6SN7GTB Tube with box. Thank you Jim for your recommendations and fantastic service as well. The tubes test with readings of 110/110 an Legendary 6sn7 tube. beware of cloned/fake russian made 134099546895 6SN7 GTB SYLVANIA NOS RARE "SAME DATE CODE " PLATINUM MATCHED QUAD TV7 (#145601787698) r***o (430) - Feedback left by buyer. 12v. Any 6DN7 with acid etched dotted code on them were made by GE regardless of any other markings. 1 6SN7GT BENDIX Black Glass HiFi Amp Vintage Vacuum Tube Code 50-26 SALE! Opens in a new window or 6SN7 GTA SYLVANIA Nos Same Date Code Tall Glass Platinum Matched Quad - £331. Now very rare this special version on low noise has Tubes: our philosophy. Tube Two: 72 / 76 (Unbranded base yet Sylvania-made with only recognizable code with what looks like 7-51; 6SN7GT on glass with code F1M) Minimum is 50. Ken-Rad JAN-CKR 6V6GT VT-107 item 1 Sylvania 6SN7GT Vintage Tube Date Code 313 Tested VG+ Electron Vacuum Preamp Sylvania 6SN7GT Vintage Tube Date Code 313 Tested VG+ Electron Vacuum Preamp. Nov 17, 2009 you'd want to find a 'matched pair' i. Extra 5% off with coupon. FOR SALE! (We have enough collection to GIVE A PLATINUM MATCHED QUAD tubes. They can also be JAN-rated and thus be marked JAN-CHS-6SN7GT. The "Bad Boys" Sylvania 6SN7-GT was made from late 1951, week 39 ("1/39") to early 1953, week 13 ("3/13"). The consensus seems to be that the 6f8g and 6sn7 round plate black glass are the same thing. Search US . $4. My preference is for the mid 70’s production. $17. Buy It Now +C $83. FOR SALE: Vintage NOS 6SN7 five tube lot Sylvania and RCA tested strong on Hickok 752 tester! 1950s date codes: Vacuum Tubes - Valves: $125. Not impossible but generally the metal bases are on older tubes Find great deals on eBay for 6sn7 Sylvania. Original package : no. They were made for Motorola by GE. C ertainly the best 6SN7 produced in the United States, and probably also the rarest. These were tested on my Dan 1. CA. Subscriber. Other significant features: when seen, date codes are vertically arranged (from top to bottom) Interpreting Date Codes. $82. Bought these tubes from a reliable tube dealer 6 months ago at which time they were tested using a Both have identicalEB date codes, very nice bright flashing and each tests strong as new and nicely matched electronically to one another. starting from € 110,00. I'd probably get all three tubes, Looking for tubes I found these Sylvania 6SN7 and thought they would be a good choice, but wanted to know if they'd work ok. Free US shipping Photo. Explore . PRODUCT INFORMATION . Both have identicalBA date codes, very nice bright flashing and each tests strong as new and nicely matched electronically to one another. FOR SALE! Truly beautiful sounding tubes. Jr. This photo compares a well-known Sylvania design of 6SN7GTB black plates audio tube, 1960’s vintage, which has printed into the glass “6SN7” above “GTB”. Read 2627 times. com. Print. A genuine Bad Boy should have a black base with the Sylvania brand name, triangular logo and codes stamped in green ink. These were tested on my Dan Nelson calibrate 1966 Toshiba 6SN7GTB ECC33 6SN7 Tall Bottle Tubes, Matched Pair, NOS Testing, 1956/1958 Sylvania 6SN7GTB ECC33 6SN7 Chrome Top Tubes, Matched Pair, Tested, NOS. FOR SALE! *****SELLING WORLWIDE***** >>>>RARE SYLVANIA 6SN7 GTB,NOS,Same date codes,PLATINUM MATCHED QUAD (well-balanced 145601787698. It was created by someone who happened to have a certain type of Sylvania 6SN7GT in his stock and wanted to enhance the resale value of them. Tung Sol Black Glass Flat Ladder Plate 6F8G / VT-99, $300 Hi have a couple of 6sn7s and wondering if they are the real deal. TUBES 134757711442 SYLVANIA 6SN7-GTA CHROME-TOP Stereo/Audio Tubes NOS DATE CODE ‘BA’ Matched PAIR! - $140. Made by Sylvania, although they can be relabeled / rebranded by a number of other companies, like RCA, Philco, Westinghouse, etc. This 1950/1951 Sylvania 6SN7GT ECC33 6SN7 Bad Boy Tubes, Matched Pair, NOS, Tested. I had Line Magnetic 508 int amp for 2 years which use pair of 6sn7. $154. 53. 2 character date code 1. SYLVANIA NOS 6SN7-GTB Perfect Platinum Matched Pair Tubes Triangular Black Plates ACTUAL PICTURES & TEST MEASUREMENTS OF THE TUBES YOU WILL RECEIVE Superior TRIANGLULAR-BLACK-PLATE designed for critical industrial applications where 10,000 hour life, 5) Date code of 2xx(or possibly 1xx or 3xx) were 1, 2 or 3 represent 1951, 1952 or 1953 and xx represents the week. 4pcs 6N8S 6SN7 ECC32 6CC10 USSR Triode Tubes Same Date Code 05-1973 NOS. No clue on your date codes, but those ARE Sylvania 6SN7's, that is there internal and external construction of most all your Sylvania 6SN7's, pretty unmistakable. Mihan. Sylvania 6SN7-GTA Chrome-Top Stereo/Audio Tubes NOS DATE CODE ‘BA’ Matched PAIR! Debi's Vintage Electronics Boutique (2745) Brand: SYLVANIA. Navy anchor on the bases. It was officially registered in 1941 by RCA and Sylvania as the glass-cased 6SN7GT, originally listed on page 235 of RCA's 1940 RC-14 Receiving Tube Manual, in the Recently Added section, as: 6SN7-GT. date codes. 6)Full black bottom base with Sylvania or JAN-CHS-6SN7GT in green letters it is a tube trend that signifies nothing really. 39. It was in a big box of about 200-300 tubes I several RCA black plate 12AX7's, several RCA black plate 6CG7's, some Sylvania 6SN7's (with the black triangle shaped plates) and assorted (1) Tested Sylvania 6SN7GTB Tube with box. All Rectifier; 5 Volt . Shop by category Tested Sylvania 6SN7GT Tube Date Code 2-39 Sylvania 6SN7 Both have identicalBA date codes, very nice bright flashing and each tests strong as new and nicely matched electronically to one another. - Made in the 1950s. 6SN7GTB SYLVANIA. You save $70. Buy It Now NOS SYLVANIA 6SN7-GTA 6SN7 CHROME-TOP MATCHED PAIR BLACK PLATE PAIR CARY SLP-05. New (Other) C $837. hmb3823 Soviet version 6Н8С. 67. 10. 66. Excellent communications from seller A+++++ *****SELLING WORLWIDE***** >>>>SYLVANIA 6SN7 GTB,same date code available,NOS,PLATINUM MATCHED PAIR (well-balanced triode-triode & tube-tube in transconductance 6sn7 gtb sylvania nos "same date code" platinum matched quad gm,ip & audio Find many great new & used options and get the best deals for Sylvania 6SN7GTA Vintage Tube & Tube Socket at the best online prices at eBay! Free shipping for many products! Octal Tube Socket Bakelite 6P3S-E 5881 6L6 6SN7 PL8-2P USSR NOS 18 pcs 8 pin Octal Tube Socket Bakelite 6P3S-E 5881 6L6 6SN7 PL8-2P USSR NOS. So now out know how to overpay for a Sylvania 6SN7 GT. >>>>THESE ARE PLATINUM MATCHED QUAD TUBES(well-balanced WITHIN 7% OR LESS triode--triode & tube--tube in transconductance and plate current). 6SN7/12SN7 Tubes. Can anyone shed any light on this. That true? Toggle signature. Conditions: Nos Rating : 1. (This tube has a date code 1955 Sylvania 6SN7GTB a. Quote: First is a Sylvania, Crome Dome with green text (not bold, per se) a single three digit horizonal date code (426), short bottle, stamped on top as 6SN7GTA H3B. 68 shipping. Conditions: NIB NEW IN ORIGINAL BOX Rating : 1. Pre-Owned · Silvertone. The consensus is that these are sonically superior to later makes. Here is a rare instance where the 188 code was printed on a 6SN7GTB tube, but the real manufacture was Sylvania. Sylvania was probably the most prolific American tube manufacturer, and their tubes were found packaged by many well The 6SN7GT tube type was formally registered in 1941 by RCA and Sylvania. actually, no triangle plate anything! but they exist. Verified purchase. Second style, unique sans serif, start 1962 until gradual changeover in 1974 3. Year of production: 1940's. If you buy the hype, ONLY the "3 hole" plates qualify it as a "Bad Boy". Best 6SN7's ever made were the old stock Tung Sols, IME. Member; Posts: 179 there are slight variations in construction and sound with different date codes. Shop with confidence. I also got two Tungsol labeled tubes: For your consideration are two Sylvania 6SN7 3-Hole T Black Plates. Year of production: Structure's features: L ong "T" black plate ring getter. 6SN7GT Sylvania long "T" black plate ring getter pair Mu 19. Previous | Next. New posts Search somehow I have my doubts that a metal base 6SN7 was being made week 44 of 1975. Sold for . I have a sylvania 6189w tube,the numbers from top to bottom are 6727,does anyone know when this was made?THANKS. This is what is round in all of my early 1950s Sylvania 6SN7 GTA tubes. 9 / 19. I had got good collection of Nos 6sn7 tubes. Shop 6SN7 GTB SYLVANIA NOS "same date code" PLATINUM MATCHED PAIR online at a best price in Barbados. Takatsuki TA−274B Rectifier Tube. . 2. They have 1960 date codes. Soooo, how about the sound? Well. . Brand New. Unfortunately, I don't see any date code or even EIA code on the side anymore, or not one that I can make out. Research how much Sylvania JAN-CHS-6SN7W is worth using 20 Years of Hi-Fi Sylvania metal base 6SN7 tubes JAN-CHS-6SN7W: 9/10 : View Listing: 03/01/2020: 09/01/2019: Sylvania JAN-CHS-6SN7W 6SN7GT 6SN7 Mil-Spec Tubes, Matched Pair, Tested, NOS/NIB, Matched Codes: 10/10 : View Listing: 02/01/2018: Pair of very strong tubes: 8/10 : View Can anyone help me id the year of this Sylvania 6SN7GT (date codes: 939 and J8A)? I thought it was 1959, but then I read somewhere that 6SN7GT's were already phased out by then. 68. Type: 6SN7 WGT Manufacturer and factory: SYLVANIA USA. The clearity of the midrange is unmatched in any These are the real thing. Sylvania 6SN7 GTA chrome dome (platinum matched) Canuck Audio Mart CA$200 Dec 9, 2024 Subito Valvola sylvania 6SN7GT VT231 matched USA Subito €200 Sep 19, 2024 The 312 EIA code indicates that this was made bySylvania for Magnavox. Pair Sylvania 6SN7-GTA Chrome-Top Fat Base Audio Tubes NOS SAME DATE CODE “326 This 1951 Sylvania 6SN7GT tube has ladder-style black plates with copper grid posts and bottom D getters with lots of flashing. The tube plates are black and V shaped with two ribs. In Stock Alert. 30 Motorola (Sylvania) 6SN7GT Vacuum Tubes Matched Date Codes Amplitrex Tested Med. These were 6SN7GT Sylvania black STAGGERED Plates, green label, medium glass envelope, bottom getter . The 6SN7 was originally released in 1939. They have matching 1951 date codes. - Flat I know Sylvania used 3-digit date codes from my research, but these have 7326 written vertically. Product code: NOS6S0080. 00: MI Jul 16, 2024: 14 : FOR SALE: Sylvania 6SN7-GTB Vacuum Tubes (4 Tubes) Vacuum Tubes - Valves: $60. SYLVANIA 6SN7GT 2-Hole "BAD BOY" Plate Tubes Bottom Getter Matched Date Codes. or Best Offer. (1) Tested Magnavox 6SN7GTB Tube Sylvania Date Code 312-513 Magnavox 6SN7 GTB | eBay Skip to main content 6SN7 - 5692 - 6F8G - 6H8C; 6C10 - 6K11 - 6AC10; Rectifier . For construction details, look to the section on Bad Boys in Sylvania 6SN7GT (1952 vintage ONLY) [3 holes in each plate, copper grid posts, bottom getter, green labels, black base and plates, vertical Anyone assist with identifying a "G 5 Date" code for a Sylvania JAN CHS 6SN7W Any particaular WWII vintage best The date codes "c-k" and "d-k" are part of sylvania's mysterious coding system but it is estimated that the date of mfg was in the late fifties or early sixties. First up is the RCA: Shiny black round plates. They have been tested for shorts, gas, and transconductan SYLVANIA 6SN7-GTB CHROME-TOP Stereo/Audio Tubes NOS DATE CODE ‘EB’ Matched PAIR! - $140. Free shipping on New Listing Lot Of 4 Sylvania Tubes 6sn7 6SN7gt Jan 6sn7gtb TV7B/U Tested Strong (4) $89. Logged screener. Year of production: 1968. Sylvania JAN CRC-6SN7W metal base military tubes made for the Navy. Jump to Latest M. 134054844768. Ad Description. Most 1578 will also have at least one quality control stamped on the nickel base, typically an OTK stamp. 19. 6-19. 92. Original package : YES. ble nfl zszrmkt rnnlspnn erzjenge wcyq ctamj enr dxx hik