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<P><CENTER><font SIZE="+3"><font color=red>www.audiotubes.com</font></CENTER>
<P><CENTER><font SIZE="+3">BRENT JESSEE RECORDING & SUPPLY, INC.</font></CENTER>
<BODY>
<STRONG><H1><CENTER>6SL7 TUBES CURRENTLY IN STOCK</CENTER></H1></STRONG><BR><HR>
<P><H3>This page lists all of the 6SL7 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>
<P><A HREF="http://www.audiotubes.com/bjtubes.htm">Return to the Main tube page.</A>
<P><A HREF="http://www.audiotubes.com">Return to the Home page.</A>
<P>The 6SL7 is a high-mu twin triode in an octal based glass package.  To my knowledge, there were not any metal shell versions made.  Each triode section operates as a class-A amplifier.  This tube has much higher mu than it's cousin, the 6SN7.  It's factor is 70, whereas the 6SN7 is only 20, therefore these two tubes are not interchangeable.  There is still a good population of hi-fi and musical instrument amps using this tube in the preamp stage out there, and these tubes are still available.  The 6SL7 was never as popular as the 6SN7---due to the 6SN7's widespread use in television chassis design---so this tube does not turn up as often whenever vintage tubes are being sold.  It is, in the proper circuit, a wonderful sounding tube, and audiophiles would do well to try the NOS vintage 6SL7 tubes before buying anything currently made today.
<P>These tubes come in glass packages, and have envelope sizes similar to the 6SN7 family.  GE usually used a short glass shell, RCA used the medium, and Sylvania, Westinghouse, and Raytheon often used the "tall boy" style.  There are many variations among brands, and even within brands.  Here is a summary of what is most often available:
<P><H2><U>6SL7GT / G:</U> </H2> This is the standard version of this tube produced by most USA makers.  Nearly all have a pair of cylindrical plates, usually mounted low in the tube.  Early versions have an RF shield sprayed on inside the glass (greyglass), and then since about 1952 were made of clearglass.  RCA used the famous blackplates and a bottom getter, as did early Sylvania.  In the 1950s, Sylvania went to a top getter, called chrome tops, and used both a short and a tall boy style.  General Electric used a short glass envelope, bright nickel plates, and a side mounted getter.  They also made tubes for other brands.  Whenever you see the bright plates, even in tall boy glass with bottom getters they were most likely made by GE.  Ken Rad tubes are just like GE.  Early Tung Sol tubes looked like RCA, but later went to small grey rectangular plates that looked like tiny 6SN7 GE plates.  Tubes made after 1975 used the coin or wafer base.  These are all great vintage tubes.
<P><H2><U>5691:</U> </H2> This is the "industrial" version of the 6SL7, and has premium qualifications.  These include a long life heater, extra thick mica spacers, extra support rods, and often a low loss micanol base.  RCA made these in their famous "red base" line, identified by their red marbled micanol base.  Other brands sold a 5691 with brown or black bases, but virtually all were made by RCA.  These tubes are great, and last a long time.  They have also nearly disappeared.  Their high price is justified by their high quality and demand in the market.  The military versions of the 6SL7 are often just as good, so don't despair if you can't find 5691 tubes!
<P><P><H2><U>JAN 6SL7GT, JAN 6SL7WGT, VT229:</U> </H2>  These are the military versions of these tubes.  The Joint Army-Navy used the term "JAN", sometimes (but not always!) with the letters WGT, and / or (but again, not always!) with the designation of VT229.  A true military tube will always be marked "JAN".  They may or may not have listings such as "WGT", which is mil spec ruggedized; or VT229, which is the military type number of this tube.  A common belief is that VT229 tubes are better than JAN or WGT types.  Not true!  These ARE ALL THE SAME TUBES.  They may or may not have brown micanol bases.  All have extra support rods and mica, and are very rugged tubes that sound wonderful.  The RCA, Sylvania, Ken Rad, and Tung Sol JAN blackbase tubes look much like their civilian counterparts.  JAN Sylvania, Tung Sol, GE, and RCA also made versions with brown bases, mostly with short glass envelopes.  The JAN Sylvania have a light marbled base, and the plates inside are very short black cylinders.  These milspec versions are an endangered species, and stocks may be wiped out when the 5691 series of tubes vanish.  Prices are on the way up because of this.
<P><P><H2><U>6SU7GTY / 6198:</U> </H2> This is a premium version made by Tung Sol, possibly made by them for other brands as well, as GE lists it in their own "Essential Characteristics" book.   It has a brown micanol base and the triode sections are factory matched.  Sometimes the tube is listed by the industrial number of 6198, some military types list both numbers on the tube, and yet some don't use the industrial number.  It's the same tube regardless.  These are great 6SL7 substitutes said to sound sweet, but are rare.  

<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.
<P><A HREF="http://www.audiotubes.com/audtube.htm">Return to the Audiophile tube page.</A>
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<P><center>NEW!  Order tubes or merchandise using your credit card!  Click here:
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</center></H3>

<p align="CENTER">&nbsp;</p>

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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">5691 RCA redbase premium industrial 6SL7GT, short glass envelope.<font color=red>MATCHED PAIR</font></td>
    <td width="38%" height="16"><p align="center">New Old Stock original Box and white box.  This redbase is a very good, very rare dual triode.  Rugged 4 support posts, 10,000 hr. life, low microphonics.  Built like a tank, awesome tube!  These are great matched pairs!</td>
    <td width="11%" height="16"><p align="center">$125.00 per pair</td>
    <td width="25%" height="16"><p align="center">4 pairs</td>
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    <td width="26%" height="16"><p align="center">5691 RCA and RCA made for GE redbase premium industrial 6SL7GT, short glass envelope.</td>
    <td width="38%" height="16"><p align="center">New Old Stock original Box.  This redbase is a very good, very rare dual triode.  Rugged 4 support posts, 10,000 hr. life, low microphonics.  Built like a tank, awesome tube!  </td>
    <td width="11%" height="16"><p align="center">$53.00</td>
    <td width="25%" height="16"><p align="center">3</td>
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    <td width="26%" height="16"><p align="center"> JAN 5691 RCA military redbase premium 6SL7GT, short glass envelope.</td>
    <td width="38%" height="16"><p align="center">New Old Stock original Box.  This is a very good, very rare dual triode.  Rugged 4 support posts, 10,000 hr. life, low microphonics.  Military JAN designation, milspec.  Built like a tank, awesome tube!  <U>Matched pair $130.00.</U></td>
    <td width="11%" height="16"><p align="center">$58.00</td>
    <td width="25%" height="16"><p align="center">2</td>
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    <td width="26%" height="16"><p align="center">6SL7GT Brimar made in England, black cylindrical plates, BVA logo, 1957 date codes.</td>
    <td width="38%" height="16"><p align="center">New Old Stock Original Box.  Beautiful and rare British 6SN7GT tubes, still in the original boxes with each tube in a paper/cardboard wrapper inside.  Each tube test numbered on the tube and the box.  All date coded 1957.  These were the best British tubes, intended for sale only in the UK and not for export.  Maybe the best 6SL7 to ever grace your ears! </td>
    <td width="11%" height="16"><p align="center">$45.00</td>
    <td width="25%" height="16"><p align="center">1</td>
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    <td width="26%" height="16"><p align="center">6SL7GT Haltron made in England, grey cylindrical plates<font color=red>MATCHED PAIR</FONT></td>
    <td width="38%" height="16"><p align="center">New Old Stock Original Box.  Beautiful and rare British 6SN7GT tubes, still in the original boxes.   These were the best British tubes, intended for sale only in the UK and not for export.  Rare in a nicely matched pair like these.  Maybe the best 6SL7 to ever grace your ears! </td>
    <td width="11%" height="16"><p align="center">$90.00 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">6SL7GT / VT229 blackbase JAN Sylvania Military grade, black cylindrical plates<font color=red>MATCHED PAIRS</FONT></td>
    <td width="38%" height="16"><p align="center">New Old Stock Original Box and whitebox.  Scarce tubes, hard to keep in stock.  Medium glass envelopes.  Great early 1950s Sylvania military blackplates, nicely matched in pairs.</td>
    <td width="11%" height="16"><p align="center">$69.00 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">6SL7GT/WGT/VT229 blackbase JAN Sylvania Military grade, black cylindrical plates</td>
    <td width="38%" height="16"><p align="center">New Old Stock Original Box and whitebox.  Scarce tubes, hard to keep in stock.  Short and medium glass envelopes.  A few have other brands on the label, but are Sylvania made.</td>
    <td width="11%" height="16"><p align="center">$28.00</td>
    <td width="25%" height="16"><p align="center">16</td>
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    <td width="26%" height="16"><p align="center">6SL7GT / VT229 blackbase JAN Raytheon Military grade, black cylindrical plates<font color=red>MATCHED PAIRS</FONT></td>
    <td width="38%" height="16"><p align="center">New Old Stock Original Box and whitebox.  Scarce tubes, hard to keep in stock.  Short glass envelopes.  These are rare early 1950s Raytheon military blackplates, with the early orange lable on black bases,  nicely matched in pairs.</td>
    <td width="11%" height="16"><p align="center">$79.00 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">6SL7WGT brownbase JAN Sylvania Military grade, black or gunmetal cylindrical plates, heavy top and bottom mica spacers, top getter (chrome top).</td>
    <td width="38%" height="16"><p align="center">New Old Stock Original Box and whitebox.  These are virtually the same as the 5691.  Short glass envelopes.  Famous Sylvania "chrome domes", long since out of production, heavy demand is making these scarce.  <font color=red>Matched pairs at just $70.00!</font></td>
    <td width="11%" height="16"><p align="center">$30.00</td>
    <td width="25%" height="16"><p align="center">6</td>
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    <td width="26%" height="16"><p align="center">JAN CKR6SL7GT / VT229 blackbase RCA,  Raytheon or KenRad  Military grade,  cylindrical plates</td>
    <td width="38%" height="16"><p align="center">New Old Stock  whitebox.   All medium glass envelopes, clearglass (greyglass on two Tung Sols).  The rare Ken Rad or Tung Sol military tubes, all from a 1948 job box of JAN tubes.  The VT229 is one of the best 6SL7 type vintage tubes, and some clients prefer it over the 5691.</td>
    <td width="11%" height="16"><p align="center">$37.00</td>
    <td width="25%" height="16"><p align="center">5</td>
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    <td width="26%" height="16"><p align="center">6SL7GT/WGT brownbase JAN GE, Tung Sol Military grade</td>
    <td width="38%" height="16"><p align="center">New Old Stock Original Box and whitebox.   Short and medium glass envelopes.</td>
    <td width="11%" height="16"><p align="center">$27.00</td>
    <td width="25%" height="16"><p align="center">5</td>
  </tr>
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    <td width="26%" height="16"><p align="center">6SL7GT RCA made brownbase, greyglass O.E.M. tubes</td>
    <td width="38%" height="16"><p align="center">New Old Stock white box.  Factory  production samples.  Labelled "N.J.R.T.
Tube Co." and hand lettered "6SL7GT".  Look like military spec RCA or GE greyglass brownbase tubes, but are not marked JAN.</td>
    <td width="11%" height="16"><p align="center">$15.00</td>
    <td width="25%" height="16"><p align="center">11</td>
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    <td width="26%" height="16"><p align="center">6SL7GT RCA greyglass</td>
    <td width="38%" height="16"><p align="center">New Old Stock Original Box.  This is the early version of this tube, from the 1940s, with an internal RF shield sprayed on the inside of the glass.</td>
    <td width="11%" height="16"><p align="center">$19.00</td>
    <td width="25%" height="16"><p align="center">12</td>
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    <td width="26%" height="16"><p align="center">6SL7GT RCA clearglass</td>
    <td width="38%" height="16"><p align="center">New Old Stock Original Box.  Demand for these is on the rise, making this fine tube a vanishing species.  Get yours now!</td>
    <td width="11%" height="16"><p align="center">$19.00</td>
    <td width="25%" height="16"><p align="center">7</td>
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    <td width="26%" height="16"><p align="center">6SL7GT  Sylvania top getter (chrome tops), tall boy style</td>
    <td width="38%" height="16"><p align="center"><font color=red>SPECIAL PRICE</FONT>New Old Stock Original Box .  Here is a nice batch of  tall boy style blackplate "chrome domes", all in original boxes dated 1958.  These shiny beauties have the heavy top getter flashing. </td>
    <td width="11%" height="16"><p align="center">$15.00</td>
    <td width="25%" height="16"><p align="center">1</td>
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    <td width="26%" height="16"><p align="center">6SL7GT  Sylvania top getter (chrome tops)</td>
    <td width="38%" height="16"><p align="center">New Old Stock Original Box and whitebox.  These "chrome domes" are great tubes, and still a bargain!  Green label, oval plates available at $25.00 each.</td>
    <td width="11%" height="16"><p align="center">$17.00</td>
    <td width="25%" height="16"><p align="center">25</td>
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    <td width="26%" height="16"><p align="center">6SL7GT General Electric side getter</td>
    <td width="38%" height="16"><p align="center">New Old Stock Original Box and whitebox.  These have bright nickel cylindrical plates in a short glass envelope.  A few have other brands on the label, but are GE made.</td>
    <td width="11%" height="16"><p align="center">$17.00</td>
    <td width="25%" height="16"><p align="center">19</td>
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<tr>
    <td width="26%" height="16"><p align="center">6SU7GTY / 6198 Brownbase, greyglass, black oval plates,  Tung-Sol</td>
    <td width="38%" height="16"><p align="center">New Old Stock Original Box and whitebox.  Blackplate, greyglass, made by Tung Sol.  This industrial 6SL7 has matched triode elements.  An excellent sounding step up from standard 6SL7 tubes!  One made for Chatham Electronics with blackbase.</td>
    <td width="11%" height="16"><p align="center">$19.00</td>
    <td width="25%" height="16"><p align="center">2</td>
  </tr>
<tr>
    <td width="26%" height="16"><p align="center">6SL7GT Other USA brands</td>    <td width="38%" height="16"><p align="center">New Old Stock Original Box and white box.  Most of these are made by GE, with the nickel plates.  Most are bottom getter, in either medium or tall boy envelopes.  Brands include Westinghouse, Tung Sol, Raytheon, Motorola, Zenith and others.  All vintage USA full octal base.</td>
    <td width="11%" height="16"><p align="center">$13.00</td>
    <td width="25%" height="16"><p align="center">12</td>
  </tr>


</table>

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Anon7 - 2021