Printing on tubes is perfect, and untouched. Boxes are very old condition, and as is.

The tubes are optical and electrical beautiful condition, testing at 100%, with printed Amplitrex Test report.

This is prime quality NOS. You have any requirement? These tube fulfil it.

Pic1 - Box1 - Box2

This is a 2A3 from the early 1970's but with 6.3V Filament, and an Octal base. All other data is fully equivalent to 2A3. MINT Quality item.

Why trouble yourself with so called NOS 2A3 that are expensive, and perhaps not really good? Take this EXCELLENT tube, and use 6.3Volt heater and Octal base. Very large, double getter flash.

Sold in Amplitrex matched pairs. Quads are no problem.

These run on EVERY 2A3 schematic, but you need to change the heater voltage to 6.3V 900mA, and these have an octal base. For the rest they are identical.

This is SVETLANA NOS WINGED-C NOS from the early 1970's when the Russian production was at it TOP of it's performance. This quality is like Russian Telefunken. Invest your money is this is safer than in stocks.

This tube is the small sister of the 6C33. Superb Quality 11 Watt Triode, with very low Rp (400 Ohms) at relatively low plate voltage. Can be used nicely in OTL amplifiers.

Also nice as SE tube. If you put 4 parallel you get an 44 Watt, 100 Ohms tube. Ideal to connect to the Lundahl LL1627-185mA (or amorph version LL1627AM.185)

Another fine application is as interstage transformer driver, since interstage driver tubes must have low impedance. A good interstage transformer is the LL1660-25mA, and wire it for a factor 4,5 step up. 200V 25mA is a good working point. The tube itself has a gain of 8, making the total gain 36. That drives a 2A3 directly. Who needs more gain can also use the line output transformer LL1689 and use it reversed as a 1:9 step up. This is difficult to drive with a tube, but hey.. it is no problem for this tube.

This tube features absolutely latest technology. It had gold grids, and a Zirconium top getter. At high temperature, the Zirconium getter gets active, and keeps the tube fresh as on the first day it was made. These getters are better than Barium getters, but can only be used in tubes with a very hot spot inside, to mount it on. This tube is made to run on high power. No need for de-rating. Also the glow picture is amazingly nice, since the cathode can be seen from the sides.

Best of all, they are available in quantities and for a low price... What else do you need...?

For prices, please check the official price list.

Original Boxes. most are sealed.

1. Unboxing movie
2. Some schematics with 6C33 and many other are here
3. Break up a 6C33 and see what is inside

Ulyanov Russia. The original from Russian Jet Airplaines.

NOS from Bulk pack.

I have them from Bulk pack with single pieces, as pcitured, but also Bulk Packs with 10 pcs originally sealed in a factory plastic cover, with old sticker on it.

RCA 6N7 /ECC31

Note: ECC31 is not a 6SN7.

Lovely smoked glass Version. Date on boxes 1944. This is Navy Quality from WW2. The best quality ever made. These are RCA, smoked glass, a nice pair, original nice boxes, not opened 100 times.

Tests:

Pic1 - Pic2 - Pic3 - Pic4

6SL7-WGT SYLVANIA. 1966 NOS.

JAN TESTED. (Article here about JAN)

These beautifl tubes from 1966 will not dissappoint you. The boxes are a little bit old, but out come tubes like new. With nice green printing. JAN Tested tubes.

More pics1 - More pics2

LONG PLATE Version, with longer glass than normal. Reliable, stabile, and good sounding. Beautiful NOS tube, they test excellent, all of them.

Read more on the 6SN7 page.

Link here

The stock is a lot smaller as on the picture now, but we have them still available. i

2.5V Driver Triode, UX5 Base. Sockets are on stock. Gain=9. datasheet at www.jacmusic.com (Techcorner). Beautiful mesh triode, used by Triode Dick in the Ceasar amplifier.

Used, strong tubes. Acquired fFrom the stock of (late) George Fathauer.

Originally boxed, Raytheon. Shouldered glass.

BOX picture: Click here

5687. One of the best driver tubes ever made. Wwith high filament power and beautiful glow picture. Similar to E182CC, but smaller dimensions and not 100% identical.

Used by Audio Note, and several others.

These tubes are getting out of stock everywhere. No plans to make a replica anywhere, because that pay off only for mass production. After the NOS is all gone, the markets will depend on used tubes.

Buy NOS now, while you still can.

Link to 5687 Page.

5691 has Tungsten heater wires, lowest microphonics, and the famous moisture proof red-base. It is rated for 500G shock, meaning you can drop it on the floor. NOS 5691 is the tube to use, when you want the BEST 6SL7 ever made.

Click on above picture for more information

Year: Appr 1982.

Special Teflon / Gold plated socket available for this tube. This socket is for PCB only. For chassis wiring, you can just wire the tube in, like normal components. Another picture.

Year: Appr 1982.

6112 is the 'pencil' Version of ECC83 or 6SL7. Tube data is not fully equivalent, but close. Consider to put both sections of the 6112 in parallel. Some do this with 6SL7 too. This will give you the same gain, but plate current will be double, and output impedance will be half.

Look here for a very nice, balanced phono pre-amp with the 6112 tube. For lower noise, you should take the MM version, and use a Lundahl MC transformer.

http://www.tubecad.com/july99/page11.html

Year: Appr. 1945

This tube is a a fraction smaller than a 45, there is e some resemblance. It is almost identical to TFK RE134. This 18028 is 2nd. world war production, and then we always talk about ultimate quality.

Article about this tube here

Year: Appr 1940...1950.

This is NOS VALVO branded AD1, but inside I see the characteristic (getter pill) TELEFUNKEN system. These are the one and only best ever AD1. In a nice VALVO box, but not belonging to this tube originally. Sorry for the price, but try to find REAL AD1 NOS and a perfect curves plot along with it.

The tube has an original label on it: 'GEGENTAKT' which means it is possible to use it also for a push pull amplifier. This was a selection for higher peak emission. So this tube is the finest of all AD1 you can ever get. It confirms from the tube curves, they are magnificent. I bought tube from a collector who is getting too old, and selling off his stuff. I know definitely he never used it, only test it as on a Funke W19 before selling to me.

Valvo bought the early AD1 (barium pill) from Telefunken. The later, Barium coated versions, is the Siemens EbIII rebranded or the Tungsram /Philips rebranded. The Tungsram /Philips have a reputation to develop grid current or gas if you buy NOS. However, the TFK barium pill tubes are finest quality. As far as I experienced myself, any NOS comes out of the box with exact specifications, as if put in yesterday. They do not even need a burn in. It needs no explanation why tube collectors prefer the NOS Barium pill TFK tubes. You recognize those by a bubble on the middle of the plate, inside which was the Barium pill before closure of the bulb. By the activation process, they managed to have that evaporated and have it condensed on the filament. I think with an electrostatic field. At that time already a 'secret' process, and today the real secrets of the process has been lost as most old engineers have passed away now.

This is not a pentode, which has original (factory intended) use as Triode as well. Please check here for the triode connected curves, as originally by Telefunken. This is from the 'D' Series of German Post tubes, in which family of the 'C' Series you find treasures like C3m, C3g.

Normally, a pentode if connected as a triode will have unlinear curves, so they are not made for that. Not so with D3a! Truly amazing, excellent original triode curves are published. When you choose the recommended operating point, the curves are very linear, and in triode mode this tube has a gain of 77, even at maximum 4.5 Watt! From the family of ECCxx tubes, I only find ECC83 which can do so, but ECC83 is very high impedance, 1.2mA only. ECC83 gold pin NOS is expensive. D3a will give a gain of 77 at much lower impedance. So you see, this tube is really a first class product.

Recommended SE transformer LL1660-25mA.

Full full details with more pictures check the pentode page.

Equivalents: 12AX7, ECC803, E83CC

Used.

Test at 8.5 + 10.5 at Funke W19. Good starts at 7.

E182CC is an upgrade for the 5687 tube. E182CC is larger size, with quite long, flat boxed plates, for better linearity.

This is a normal stock item here (stil...) same as the 5687, but both stocks are running out, and no new supply is coming in.

picture1 - picture2 - picture3 - picture4 - Getter

A Portrait of this tube here.

From original factory bulk packs. (see pictures).

Note - we stock only graphite plates at the moment. Copper plate is extremely rare and sold out. Graphite is electrically better, it can take some time overload or forgive some other mistakes. Copper is more shock/drop proof. Each have it's own advantage.

A portrait of GM70 here

These are at a good place here, because today's application is to triode connect those. This is a very nice looking pair. Fully identical looking, test fully identical and extremely strong. Wow!!!! 211 or 845 are toys compared to those old Telefunken jewels. They are both believed to be unused.

Connectors at the bottom and top are bananas, side is a fork. Original connection set for the side connector is with the tubes. Click here for more info.

This tube is in the family of PX4, PX25A, etc. Though the datasheet says 'max 400V', on these tubes here is written 'max 500V'.

From the Pederson factory is nothing left whatsover, it was completely wiped out, near the end of WW2, because they build tubes for the German electronic compass and other very advanced equipment.

U4AB is mentioned in the Telefunken Werkstattbuch

Compressed data from an original Pederson file:

Max U a= 400V.
Max Pa = 25Watt
Uf = 4Volt
If = 1Ampere
Gm= 4mA/V