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<P><CENTER><font SIZE="+3">BRENT JESSEE RECORDING & SUPPLY, INC.</font></CENTER>
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<STRONG><H1><CENTER>6SN7 TUBES CURRENTLY IN STOCK</CENTER></H1></STRONG><BR><HR>
<P><H3>This page lists all of the 6SN7 tubes I currently have in stock, including all industrial and European versions. These are extremely high demand vintage tubes, so I have these listed on their own page, as my stock changes rapidly. If you need a quantity of these tubes, or have specific needs such as matching, special construction, etc., <A HREF="mailto:[email protected]">please e-mail me.</A>
<P><A HREF="http://www.audiotubes.com/order.htm">HOW DO I PLACE MY ORDER?</A>
<P><A HREF="http://www.audiotubes.com/nosnote.htm">An Important Note About NOS Tubes. Please Read.</A>
<P><A HREF="http://www.audiotubes.com/audtube.htm">Return to the Audiophile tube page.</A>
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<P>The 6SN7 tube is a medium-mu twin triode in an octal based package, usually glass, although some metal envelope types were made.
In normal use it operates as a class A amplifier. It was widely used in the early days of television as the vertical amplifier, and it's use was
so common in most TV chassis designs that vintage 6SN7 tubes are still fairly easy to find today. Audio designers soon found it made
a great audio preamp with it's large plates, ample power reserve, and low microphonic octal package. The GTA and GTB types, having
been fine tuned for demands in television chassis vertical sweep circuits, can handle up to 7 watts maximum plate power!
<P>The demands for these tubes today are primarily in vintage and recent design audio amplifiers and preamplifiers of the high-fidelity
type, up to and including the most expensive and esoteric. It seems there is a 6SN7 tube for every taste and budget, and some of the
vintage versions are being hunted to extinction, especially those made for the military. I will try to explain the differences between some of these tubes, and list specifically what I have in stock. I expect some of these tubes will skyrocket in price worldwide as more and more audio designers find out that this preamp tube is a design that really can't be improved upon....and that the fine vintage tubes just
cannot (and probably will not) ever be duplicated by a current production tube.
<P>Three envelope sizes are common in the full octal base version: <U>SHORT</U>, glass is 1.5 inches high; <U>MEDIUM,</U> glass is 1 3/4 inches
high; <U>TALL or "TALL BOY"</U>, glass is 2 inches high.
<P><H2><U>6SN7GT / G:</U> </H2> This is the original version of this tube. It may be found in all three sizes of glass envelope. 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. The early Sylvania types had a top getter and silver flashed the entire top of the tube, sometimes called "chrome tops". Many brands used this design, but the high mounted triangular plates means it most likely was made by Sylvania. The early RCA "GT" types were usually in either a medium or short envelope and have a grey RF shield sprayed on inside the glass. The GE and KenRad types were similar, but the inner glass coating is deep black. These tubes usually have flat black plates, like large 12AX7 blackplates. The military versions of these are the VT-231 and are in very high demand today.
<P><H2><U>6SN7GTA / GTB:</U></H2> This is the later improved version, and the improvements were primarily geared toward the TV chassis designers
who demanded more max. plate wattage and voltage, where vertical circuits can put up to 1500 volt pulses at 7 watts on the plates. For
hi-fi audio use, these improvements are meaningless. These are fine tubes, nonetheless. Most are found in the short glass envelope,
but some brands like Raytheon used the Tall Boy style. Sylvania made tubes have the triangular plates mounted lower, and set at angles to each other, although some of the very earliest examples of the GTA types still used the dull blackplates facing each other. RCA used the flat black plates "sideways" to each other, and GE used the grey plates parallel to each other. The Sylvania
types in demand have a large top getter patch. The earliest Sylvania GTA types have a green label and heavy top getter flashing extending down the sides of the tube. The early GTB types are similar, but have a yellow or red label. The versions from the 1960s have the getter just covering the top of the tube. All of these have the same black triangular plates and are excellent tubes. The GE types have a side getter and large parallel grey plates, and the RCA used both bottom or side getter. Most other vintage USA brands you find will have been made by these three vendors, and will be one of the above variations, regardless of brand
on the label. A few were made with brown micanol bases, the RCA types being very dark brown, the GE types being a lighter, marbled
brown. Many audiophiles prefer either the Sylvania chrome tops, the RCA, or the GE side getter over any others, even over the military or redbase types. These are all a great bargain now, and are sure to be rare and expensive tomorrow.
<P><H2><U>6SN7W / WGT / WGTA:</U> </H2> This type indicates a military spec tube that was not made for consumer use. These usually have extra support posts on the plate structure, heavy mica spacers, and brown micanol bases. These also have the famous triangular shaped black plates. They have been ruggedized to withstand shock,
the brown low loss micanol base resists mold, mildew, and fungus growth, and they can withstand heat even if used upside down. The early Sylvania 6SN7W types from the 1940s had a metal collar around the base, then later a black base. These look internally alot like the early Sylvania GTA types listed above. Sylvania made these for other brands as well, including RCA. Easy to spot as they have the triangular blackplates facing each other in a short bottle, with a very heavy chrome top flashing extending down the sides of the tube. These are RARE and worth seeking out! The WGT and WGTA types all had brown bases. Only the WGTA types made in the late 70s and 80s reverted back to black bases then coin or wafer bases. These are all wonderful tubes, are long lived, and sound fantastic. No wonder they are fast disappearing from the vintage market.
<P><H2><U>CV1988:</U></H2>Another fine military version of the 6SN7GT, this time from Western Europe. These don't often turn up in the USA. The few I have seen have been British and manufactured by Mullard. This tube is usually medium glass, dark brown full octal base, and has a dark grey inner glass coating which hides the plates from view. I suspect these are cylindrical plates, as most of the European 6SN7 varieties have been this type. These are rare, and worth seeking out. Not only do they sound as good as the best industrial 5692, but they have the higher specs of a 6SN7GTB with regards to plate current and voltage, and have the long heater life and overall ruggedness of the US military types. A winning combination!
<P><H2><U>5692:</U></H2> This is the premimum commercial / "industrial" grade of 6SN7. The most famous of these are the RCA "redbase" series, with their distinctive red marbled full octal bases. These are always in the short glass envelope style, and most have four support rods joining the four corners of the top and bottom mica spacers and supporting the plate structure. These have 10,000 hour life filaments
and are very resistant to shock and vibration, making them low in microphonics. The RCA versions have the "stop sign" label on the top of the tube with the number 5692 inside, and on the older tubes this was often smeared off, being printed with a chalky white paint. ALL of the redbase versions of this tube were made by RCA, regardless of the brand on the label. TungSol, GE, and Raytheon can often be found branded on the label, but RCA made them all. Other brands like CBS/Hytron and Sylvania made brownbase versions of this tube, but I suspect all were actually made by RCA, as they are identical inside. These are all really fine tubes, but have been hunted nearly to extinction. I usually only have a few in stock, but they are worth the higher cost in overall long life and great sound.
<P>For more information on 6SN7 tubes, see TubeSeller.com at <A HREF="http://www.tubeseller.com/6sn7info.html">http://www.tubeseller.com/6sn7info.html</A>
<P><A HREF="http://www.audiotubes.com/tubeform.txt">Click here for a printable order form.</A> Use your "back" button to return to this page.
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<td width="26%" height="19"><p align="center"><strong>Tube</strong></td>
<td width="38%" height="19"><p align="center"><strong>Description</strong></td> <td width="11%" height="19"><p align="center"><strong>Price Each</strong></td>
<td width="25%" height="19"><p align="center"><strong>Quantity In Stock</strong></td>
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<td width="26%" height="16"><p align="center">5692 RCA redbase premium industrial 6SN7GT, short glass envelope, US military packaged, <font color=red>MATCHED PAIR</FONT>.</td>
<td width="38%" height="16"><p align="center">New Old Stock, original US military box. This is a very good, very rare dual triode. Rugged 5 support posts, 10,000 hr. life, low microphonics. This is the real thing, getting harder to find every day. These are immaculate tubes with matching date codes, all made and boxed for the US military. These pairs are matched to within 2-3 percent. Some say this is the best 6SN7 type ever made.</td>
<td width="11%" height="16"><p align="center">$174.00 per pair</td>
<td width="25%" height="16"><p align="center">0</td>
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<td width="26%" height="16"><p align="center">5692 RCA redbase premium industrial 6SN7GT, short glass envelope.</td>
<td width="38%" height="16"><p align="center">New Old Stock, original box and white box. This is a very good, very rare dual triode. Rugged 5 support posts, 10,000 hr. life, low microphonics. This is the real thing, getting harder to find every day. Some say this is the best 6SN7 type ever made. One is made for Tung Sol.</td>
<td width="11%" height="16"><p align="center">$70.00</td>
<td width="25%" height="16"><p align="center">0</td>
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<td width="26%" height="16"><p align="center">5692 RCA redbase premium industrial 6SN7GT, short glass envelope.</td>
<td width="38%" height="16"><p align="center">Used tested good, white box. This is a very good, very rare dual triode. Rugged 5 support posts, 10,000 hr. life, low microphonics. Try them used with no burn-in needed, lots of life left, and a big savings!</td>
<td width="11%" height="16"><p align="center">$41.00</td>
<td width="25%" height="16"><p align="center">0</td>
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<td width="26%" height="16"><p align="center">5692 Hytron, blackbase, chrome top, short glass envelope.<font color=red>MATCHED PAIR</FONT></td>
<td width="38%" height="16"><p align="center">New Old Stock original box. These appear similar to Sylvania with black triangular plates, and resemble the VT-231 military types (late 1940s version). A nicely matched pair of these difficult-to-find tubes.</td>
<td width="11%" height="16"><p align="center">$100.00 per pair</td>
<td width="25%" height="16"><p align="center">0</td>
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<td width="26%" height="16"><p align="center">5692 JAN GE or Westinghouse brownbase military grade 6SN7GT, short glass envelope.</td>
<td width="38%" height="16"><p align="center">New Old Stock white box and original box. Made by RCA, is nearly identical to the redbase version above, complete with 5 support posts. Nicely matched pairs of these rare tubes, one of the better investments you can make in a pair of vintage 6SN7 type tubes!</td>
<td width="11%" height="16"><p align="center">$120.00 per pair</td>
<td width="25%" height="16"><p align="center">0</td>
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<td width="26%" height="16"><p align="center">5692 JAN CBS, Westinghouse, Hytron and GE brownbase military grade 6SN7GT, short glass envelope.</td>
<td width="38%" height="16"><p align="center">New Old Stock white box and original box. Made by RCA, is nearly identical to the redbase version above, complete with 5 support posts.</td>
<td width="11%" height="16"><p align="center">$56.00</td>
<td width="25%" height="16"><p align="center">1</td>
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<td width="26%" height="16"><p align="center">6SN7WGTA brownbase JAN Tung Sol Military grade, black triangular plates <font color=red>MATCHED PAIR</FONT></td>
<td width="38%" height="16"><p align="center">New Old Stock Original Box and whitebox. Scarce tubes, hard to keep in stock. These are the famous military JAN tubes, as sweet as the VT-231 types, but with brown bases. Nicely matched pairs! </td>
<td width="11%" height="16"><p align="center">$99.00 per pair</td>
<td width="25%" height="16"><p align="center">0</td>
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<td width="26%" height="16"><p align="center">6SN7WGT brownbase JAN Sylvania Military grade, black triangular plates <font color=red>MATCHED PAIR</FONT></td>
<td width="38%" height="16"><p align="center">New Old Stock Original Box and whitebox. Scarce tubes, hard to keep in stock. These are the famous military JAN tubes, as sweet as the VT-231 types, but with brown bases. Nicely matched pairs! </td>
<td width="11%" height="16"><p align="center">$99.00 per pair</td>
<td width="25%" height="16"><p align="center">0</td>
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<td width="26%" height="16"><p align="center">6SN7GT/WGT/WGTA brownbase JAN Sylvania, and JAN Raytheon Military grade, black triangular plates</td>
<td width="38%" height="16"><p align="center">New Old Stock Original Box. Scarce tubes, hard to keep in stock. The JAN Sylvania tubes are the early 1950s versions, with heavy top getter flashing (chrome domes), short bottle, and an extra support rod. The 1950s JAN Raytheon resemble the VT-231 types, but with brown bases. Excellent , clean NOS tubes! <font color=red>Matched pairs just $95.00!</font></td>
<td width="11%" height="16"><p align="center">$42.00</td>
<td width="25%" height="16"><p align="center">6</td>
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<td width="26%" height="16"><p align="center">6SN7GT - VT-231 JAN Ken Rad, blackplates, greyglass, bottom getter, medium glass envelope.<font color=red>MATCHED PAIRS</FONT></td>
<td width="38%" height="16"><p align="center">New Old Stock white box. Very fine sounding, very rare blackplates from the 1940s, made for US military. These rival the RCA 5692 redbase in quality, and are just as scarce. Full octal blackbase with silver lettering, deep black internal coating on the glass. Very rare pairs that don't often turn up.</td>
<td width="11%" height="16"><p align="center">$140.00 per pair</td>
<td width="25%" height="16"><p align="center">1 pair</td>
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<td width="26%" height="16"><p align="center">6SN7W JAN Sylvania blackplate clearglass, short glass envelope, black base, heavy top getter flashing.<font color=red>MATCHED PAIRS</FONT></td>
<td width="38%" height="16"><p align="center">New Old Stock white box. Very fine sounding, very rare blackplates from the 1940s. These beauties were made for radar equipment, and should function for a very long time. Matched to within three percent Gm on a Hickok TV-10. This is the rare early 1940s version of the military 6SN7 that predates the brownbase series, this version just slightly later than the nickel base version.</td>
<td width="11%" height="16"><p align="center">$120.00 per pair</td>
<td width="25%" height="16"><p align="center">0</td>
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<td width="26%" height="16"><p align="center">6SN7W JAN Sylvania blackplate clearglass, short glass envelope, black base, heavy top getter flashing.</td>
<td width="38%" height="16"><p align="center">New Old Stock white box. Very fine sounding, very rare blackplates from the 1940s. This is the rare early 1940s version of the military 6SN7 that predates the brownbase series, this version just slightly later than the nickel base version.</td>
<td width="11%" height="16"><p align="center">$51.00</td>
<td width="25%" height="16"><p align="center">1</td>
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<td width="26%" height="16"><p align="center">6SN7W JAN RCA blackplate clearglass, tall glass envelope, blackbase.</td>
<td width="38%" height="16"><p align="center">New Old Stock original box & white box. Very fine sounding, very rare blackplates from the 1940s. These have the heavy top getter flashing (chrome domes) and an extra support rod. Appear to be made by Sylvania. These were carefully stored and are in wonderful condition!</td>
<td width="11%" height="16"><p align="center">$51.00</td>
<td width="25%" height="16"><p align="center">1</td>
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<td width="26%" height="16"><p align="center">6SN7GT - VT-231 JAN Ken Rad, staggered blackplates, blackglass, bottom getter, medium glass envelope.</td>
<td width="38%" height="16"><p align="center">New Old Stock white box. Very fine sounding, very rare blackplates from the 1940s, made for US military. These rival the RCA 5692 redbase in quality, and are just as scarce. One is clearglass.</td>
<td width="11%" height="16"><p align="center">$51.00</td>
<td width="25%" height="16"><p align="center">2</td>
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<td width="26%" height="16"><p align="center">6SN7GT/VT231 JAN TungSol black oval (round) plates, blackglass.</td>
<td width="38%" height="16"><p align="center">New Old Stock White Box. Late 1940s , Rare tubes. This tube is very difficult to find but extremely musical and worth the search!</td>
<td width="11%" height="16"><p align="center">$68.00</td>
<td width="25%" height="16"><p align="center">0</td>
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<td width="26%" height="16"><p align="center">6SN7GT - VT-231 JAN Sylvania, blackplate clearglass, bottom getter, medium glass envelope.<font color=red>MATCHED PAIR</FONT></td>
<td width="38%" height="16"><p align="center">New Old Stock white box. Very fine sounding, very rare blackplates from the 1940s, made for US military. These rival the RCA 5692 redbase in quality, and are just as scarce. VERY difficult to find these in pairs! <font color=red>Also have a few singles at $48.00 each.</font></td>
<td width="11%" height="16"><p align="center">$110.00</td>
<td width="25%" height="16"><p align="center">0</td>
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<td width="26%" height="16"><p align="center">6SN7GT - VT-231 JAN RCA or Raytheon, blackplate greyglass, short glass envelope.</td>
<td width="38%" height="16"><p align="center">New Old Stock original box & white box. Very fine sounding, very rare blackplates from the 1940s. Deep black internal glass coating, made for US military. These rival the RCA 5692 redbase in quality, and are just as scarce. </td>
<td width="11%" height="16"><p align="center">$45.00</td>
<td width="25%" height="16"><p align="center">0</td>
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<td width="26%" height="16"><p align="center">6SN7GT Amperex Holland made for Philips<font color=red> MATCHED PAIR</FONT></td>
<td width="38%" height="16"><p align="center">New Old Stock original boxes. This rare Amperex made tube has staggered greyplates. Not often found in the USA. Date coded 1968, very nice match between triodes and between tubes.</td>
<td width="11%" height="16"><p align="center">$140.00 per pair</td>
<td width="25%" height="16"><p align="center">1 pair</td>
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<td width="26%" height="16"><p align="center">6SN7GT Haltron British made</td>
<td width="38%" height="16"><p align="center">New Old Stock Original Box. This rare British tube has black staggered plates with extra spacer rods. Not often found in the USA.</td>
<td width="11%" height="16"><p align="center">$50.00</td>
<td width="25%" height="16"><p align="center">1</td>
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<td width="26%" height="16"><p align="center">6SN7GTB blackplate, low noise screened for Baldwin Organ <font color=red>MATCHED PAIRS</FONT></td>
<td width="38%" height="16"><p align="center">New Old Stock White Box. Medium clearglass envelope, black plates, full size upper and lower mica spacers, chrome dome top getter. These are wonderful audiophile quality matched pairs of late 1950s blackplates. Screened for low noise use in Baldwin organs, and silkscreened with the Baldwin logo. I obtained a large factory job box of these, and carefully matched them in pairs. Matching is within 2 percent Gm, and the price cannot be beat! This is an excellent, low cost way to replace those Chinese or Russian tubes and hear how much better a vintage audiophile grade USA made tube can sound.</td>
<td width="11%" height="16"><p align="center">$37.00 per pair</td>
<td width="25%" height="16"><p align="center">8 pairs</td>
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<td width="26%" height="16"><p align="center">6SN7GT/A/B TungSol black triangular plates.</td>
<td width="38%" height="16"><p align="center">New Old Stock Original Box and White Box. Late 1940s and early 1950s vintage, rivals the military types in sound. Rare tubes. These are a mix of envelope styles. These are a mix of GT, GTA, and GTB types, but all are from the same period, and internal construction is similar in all. <font color=red>Add $5 per tube for matching into pairs.</font></td>
<td width="11%" height="16"><p align="center">$28.00</td>
<td width="25%" height="16"><p align="center">11</td>
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<td width="26%" height="16"><p align="center">6SN7GTA RCA blackplate, side mounted getter, short glass envelope<font color=red>MATCHED PAIRS</FONT></td>
<td width="38%" height="16"><p align="center">New Old Stock White Box. A nice, but small, batch of rare early RCA GTA type 6SN7 tubes. These have side mounted getters and short glass envelopes with staggered blackplates. These pairs are the cream of the crop, carefully matched to within 1-2 percent. These are often requested, but rarely found. These have been getting alot of press lately, as to their superb sound. Try 'em now before they are gone!</td>
<td width="11%" height="16"><p align="center">$80.00 per pair</td>
<td width="25%" height="16"><p align="center">1 pair</td>
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<td width="26%" height="16"><p align="center">6SN7GT RCA blackplate, medium glass envelope.<font color=red>MATCHED PAIRS</FONT></td>
<td width="38%" height="16"><p align="center">New Old Stock White Box. The clearglass early version of this versatle and sweet-sounding dual triode. These have staggered blackplates and a bottom getter. Full black octal base with silver printing. Nicely matched pairs of this increasingly hard-to-find late 1940s tube.</td>
<td width="11%" height="16"><p align="center">$70.00 per pair</td>
<td width="25%" height="16"><p align="center">0</td>
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<td width="26%" height="16"><p align="center">6SN7GT RCA blackplate, medium glass envelope.</td>
<td width="38%" height="16"><p align="center">New Old Stock White Box. The clearglass early version of this versatle and sweet-sounding dual triode. These have staggered blackplates and a bottom getter. Full black octal base with silver printing.</td>
<td width="11%" height="16"><p align="center">$33.00</td>
<td width="25%" height="16"><p align="center">4</td>
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<td width="26%" height="16"><p align="center">6SN7GT RCA blackplate, GREYGLASS, short glass envelope<font color=red>MATCHED PAIRS</FONT></td>
<td width="38%" height="16"><p align="center">New Old Stock White Box. At last! A big batch of the rare RCA greyglass 6SN7GT blackplate tubes! These pairs are the cream of the crop, carefully matched to within 1-2 percent. These are often requested, but rarely found. These are late 1940s vintage, the best 6SN7 tube RCA made, some say better than the 5692 type!</td>
<td width="11%" height="16"><p align="center">$79.00 per pair</td>
<td width="25%" height="16"><p align="center">0</td>
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<td width="26%" height="16"><p align="center">6SN7GT RCA blackplate, GREYGLASS, short glass envelope.</td>
<td width="38%" height="16"><p align="center">New Old Stock White Box. At last! A big batch of the rare RCA greyglass 6SN7GT blackplate tubes! These are often requested, but rarely found. All dated 1948, this is the best 6SN7 tube RCA made, some say better than the 5692 type!</td>
<td width="11%" height="16"><p align="center">$33.00</td>
<td width="25%" height="16"><p align="center">0</td>
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<td width="26%" height="16"><p align="center">6SN7GTB RCA blackplate, mostly short glass envelope.</td>
<td width="38%" height="16"><p align="center">New Old Stock Original Box and White Box. Soaring demand is pulling this fine tube out of the market fast. Stock up now! I have both orange label and silver label types. <font color=red>Matched pairs $50.00!</font></td>
<td width="11%" height="16"><p align="center">$23.00</td>
<td width="25%" height="16"><p align="center">31</td>
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<td width="26%" height="16"><p align="center">6SN7GT blackplate Greyglass Various USA Brands ( RCA or GE made)</td>
<td width="38%" height="16"><p align="center">New Old Stock White Box. This is the older style 6SN7,mid to late 1940s. Medium glass envelope, grey inner glass coating (RC A made).</td>
<td width="11%" height="16"><p align="center">$18.00</td> <td width="25%" height="16"><p align="center">0</td>
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<td width="26%" height="16"><p align="center">6SN7GTB by General Electric With Side Getter, short glass envelope, copper grid posts. </td>
<td width="38%" height="16"><p align="center">New Old Stock Original Box and whitebox. These sound as good as the redbase RCA at a fraction of the cost. A bit of pleasant warmth in the midrange, plus some reports indicate the side mounted getter adds ridigity to the plate structure, reducing microphonics. These are a bargain now, but as "fad" NOS tubes vanish, these quality USA performers will be worth their weight in gold. <font color=red>Matched pairs $50.00!</font></td>
<td width="11%" height="16"><p align="center">$22.00</td>
<td width="25%" height="16"><p align="center">59</td>
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<td width="26%" height="16"><p align="center">6SN7GTA Ken Rad, staggered blackplates, clearglass, side getter, short glass envelope.</td>
<td width="38%" height="16"><p align="center">New Old Stock white box. Very fine sounding, very rare blackplates from the 1940s, nearly identical to those made for US military. These rival the RCA 5692 redbase in quality, and are just as scarce. </td>
<td width="11%" height="16"><p align="center">$50.00</td>
<td width="25%" height="16"><p align="center">1</td>
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<td width="26%" height="16"><p align="center">6SN7GT Sylvania black STAGGERED Plates, green label, medium glass envelope, bottom getter . <font color=red>MATCHED PAIR</FONT></td>
<td width="38%" height="16"><p align="center">New Old Stock White Box. Medium glass envelopes. These are mid to late 1940s vintage, among the best 6SN7 types ever made, and are in very limited supply. These are the only Sylvania 6SN7 tubes made without the triangular shaped plates. These tubes are sought out for their flat, "staggered" blackplates, since these tubes are essentially the same as the rare and expensive Ken Rad VT-231. Matched to within 2 percent Gm.</td>
<td width="11%" height="16"><p align="center">$100.00 per pair</td>
<td width="25%" height="16"><p align="center">1 pair</td>
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<td width="26%" height="16"><p align="center">6SN7GT Sylvania black STAGGERED Plates, green label, medium glass envelope, bottom getter . </td>
<td width="38%" height="16"><p align="center">New Old Stock White Box. Medium glass envelopes. These are mid to late 1940s vintage, among the best 6SN7 types ever made, and are in very limited supply. These are the only Sylvania 6SN7 tubes made without the triangular shaped plates. These tubes are sought out for their flat, "staggered" blackplates, since these tubes are essentially the same as the rare and expensive Ken Rad VT-231. </td>
<td width="11%" height="16"><p align="center">$38.00</td>
<td width="25%" height="16"><p align="center">2</td>
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<td width="26%" height="16"><p align="center">6SN7GT Sylvania Green label, triangular blackplate clearglass, bottom getter, medium glass envelope.<font color=red>MATCHED PAIR</FONT></td>
<td width="38%" height="16"><p align="center">New Old Stock white box. Very fine sounding, very rare blackplates from the 1940s, identical to those made for US military (VT-231). These rival the RCA 5692 redbase in quality, and are just as scarce. VERY difficult to find these in pairs! Also have a few singles at $45.00 each.</td>
<td width="11%" height="16"><p align="center">$95.00 per pair</td>
<td width="25%" height="16"><p align="center">1 pair</td>
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<td width="26%" height="16"><p align="center">6SN7GTA Sylvania Triangular Plates, green label, early 1950s, heavy top getter (chrome top). <font color=red>MATCHED PAIRS</FONT></td>
<td width="38%" height="16"><p align="center">New Old Stock Original Box and White Box. Short glass envelopes. These are late 1940s vintage, among the best 6SN7 types ever made, and are in very limited supply. Closely matched under load for Gm and plate current. These are the "civilian" version of the military tubes listed above, and probably one of the best non-military types around. These are the shorties with the heavy top and sides getter flashing. These are not like the later yellow and red label GTB types of the '50s and '60s, with the smalll top getter patch. A few single tubes available at $40.00 each.</td>
<td width="11%" height="16"><p align="center">$80.00 per pair</td>
<td width="25%" height="16"><p align="center">2 pairs</td>
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<td width="26%" height="16"><p align="center">6SN7GT B Sylvania Triangular Plates, green label, early 1950s, heavy top getter (chrome top). <font color=red>MATCHED PAIR</FONT> </td>
<td width="38%" height="16"><p align="center">New Old Stock Original Box and White Box. Short glass envelopes. These are late 1940s vintage, among the best 6SN7 types ever made, and are in very limited supply. Closely matched under load for Gm and plate current.These are the "civilian" version of the military tubes listed above, and probably one of the best non-military types around. These are the very first of the GTB types, but are from the same period as the GTA tubes, with the heavy top and sides getter flashing. These are not like the later yellow and red label GTB types of the '50s and '60s, with the smalll top getter patch.</td>
<td width="11%" height="16"><p align="center">$60.00 per pair</td>
<td width="25%" height="16"><p align="center">0</td>
</tr>
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<td width="26%" height="16"><p align="center">6SN7GT B Sylvania Triangular Plates, green label, early 1950s, heavy top getter (chrome top). </td>
<td width="38%" height="16"><p align="center">New Old Stock Original Box and White Box. Short glass envelopes. These are late 1940s vintage, among the best 6SN7 types ever made, and are in very limited supply. These are the "civilian" version of the military tubes listed above, and probably one of the best non-military types around. These are the very first of the GTB types, but are from the same period as the GTA tubes, with the heavy top and sides getter flashing. These are not like the later yellow and red label GTB types of the '50s and '60s, with the smalll top getter patch.</td>
<td width="11%" height="16"><p align="center">$28.00</td>
<td width="25%" height="16"><p align="center">2</td>
</tr>
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<td width="26%" height="16"><p align="center">6SN7GTB Sylvania Triangular Plates & Top Getter ("chrome top") </td> <td width="38%" height="16"><p align="center">New Old Stock original box and White Box. This is the early version of the "triangular plate" 6SN7 and is in great demand today. Mostly short glass envelope. 1950s and 1960s vintage, yellow and red labels. <font color=red>MATCHED PAIRS $50.00! </FONT></td>
<td width="11%" height="16"><p align="center">$20.00</td>
<td width="25%" height="16"><p align="center">45</td>
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<td width="26%" height="16"><p align="center">6SN7GT/A/B Various USA Brands, various sizes.</td>
<td width="38%" height="16"><p align="center">New Old Stock Original Box and White Box. Mostly Raytheon and Westinghouse made tubes, with brands such as Zenith, Silvertone, CBS, Arvin, Motorola, and many others. Excellent vintage NOS USA tubes, bargain price!</td>
<td width="11%" height="16"><p align="center">$18.00</td>
<td width="25%" height="16"><p align="center">21</td>
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