NOS Pentodes

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How these tubes are tested

FAQ Frequently Asked Questions

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Please also check in the price list under NOS! Not all tubes in the price list are pictured or mentioned here.

 

 

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3L313L3 is a 2Watt dissipastion output pentode for battery radios, specified for 0.7 Watt output power. These are the highlight of the art of tube construction. I think nobody can make such tubes anymore today, because they need only 50mA heater current. This is incredible little. Same as an LED, but this heats a DIRECTLY heated tube! hese are real pentodes, so you can strap them triode mode to get a low noise, low impedance tube. Here is a radio circuit showing 82Volt Anode voltagem, and 7mA plate current. Best application: With such low voltage and current, they become totally IDEAL for building a battery heated phono amp or pre amp. Use rechargeable Lithium 18650B cells, with Zener diode +stabilisation, and one cell with run one tube for 24 hours. datasheet here. Pic1 - Pic2. Serialize 10 rechargeble 9V batteries for the Anode, and two tubes will run also 24 hours from those. So a battery operated, totally hum-free pre-amp can be made simple.


6AK5 Mullard

6pcs each 28 Euro

The tubes are stamped CV4010 which is the Mullard Designation for this tube. Mint condition, beautifull tubes.
For Yamamoto phono amp, pre amp, or others.


6AQ5   Tung Sol
NOS

1pcs 12 Euro

 Used in Fender guitar amps. 

6L6 Tungsram
NOS
Order Number:
125-014-49 

Price 22 Euro
6L6  GE NOS

Price 65 Euro

Original box 
6L6  Tronal

15 Euro for the pair 
Very short used by previous owner.  Looks and tests like new.  Printing not burned. With Original box 

6L6 Voskhod
NOS
Order Number:
114-052-32

 

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Russian designation is 6P3S. Supervb quality, that I have in originally sealed 50pcs boxes, and each tube is individually boxed. Cylinder glass, old fashioned construction. Extra stabile precision version, with all specs better than normal. Can be used at higher voltage. Tube bias tighter better specified. Wider range for filament voltage, and a lot more.

This tube has a gold screen grid! I have not seen that before. Normally screen grids are graphite coated. Click the next two pictures to see that.



6SJ7
NOS
Hewlett Packard 

 

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Another NOS tube that is getting harder to find every year. Electrically equivalent to EF86, but octal based. These Hewlett Packard tubes were intended for their own instruments. Prestine Quality, you have never seen this before. Come out of the boxes like new. 

 

6SJ7 -VT116 NOS
Ken-Rad

 

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 Excellent tubes, optically new, in original 1945 boxes.
6SJ7
RCA, GE

 

  
6V6 Reflektor NOS

 

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 Lovely made smoked glass 6V6, with hand-blown tube base. So no machine made tube. Printed 6N6c, which is Russian for 6V6, they used other letters. This tube is basically the older octal version of the EL84. Use any EL84 schematic to make your own 6V6 amplifier, but also many 6V6 schematics are around. Why fight over the last remaining pieces of NOS EL84, while you can get this beautiful made version of this NOS 6V6 tube. Original colored boxes.
6748 RCA NOS

1pcs 20 Euro
Potential HiFi tube 

717A Western Electric NOS

 

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Made by Raytheon,  for Western Electric.  On the box front is Western Electric, and on the box side and tubes  is written Raytheon. 

C3g ITT-Lorenz NOS
Order Number:
114-144-48

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Out of the box came came one the nicest C3g versions I have ever seen, and the Lorenz (Stuttgart, Germany) brand has an excellent reputation. The tubes are individual numbered on the tube top, and have a nice, blue paper roll on it. They come out of the boxes crispy and new, as made just yesterday.

IMPORTANT INFORMATION ABOUT C3g

A lot of C3g I found also in the year 2002 when some OEM began to sell off old stock. Around 2015, I had an excellent contact who digged up also C3g and C3m tubes in an interesting way. He was related to sales of those tubes for many years and he still the buyers and the quantities. He contacting those original buyers, after his retirement. He was lucky several times to find old stock that way. He told me there is really nothing left to find anymore at OEM customers, not at the post, not at others, just nowhere at all. He had all addresses, and he contacted each of them. Most of it, I sold to Japan, and I kept a small stock for myself. So what we have for sale here is a depleting stock, and prices may rise. Before stock cleaning of the German Post began in 1995, C3g was more expensive as NOS 2A3. From 1995...2000, 10's of thousands C3g, and C3m were sold for scrap prices by the German post. This may seem many tubes, but it is not. With 20 tubes per person, 10.000 tubes is just 500 persons. Just because they came all at once, this reduced market prices extremely, and people thought C3g was now cheap for ever. So, many HiFi lovers, and companies jumped on this wonderul, yet so cheap tube. As demand rised, no new NOS stocks were found anymore. Related to the Ebay price of 40 US$ in 1995, today's prices of C3g should be much higher. All tubes that cost 40$ in 1995 are now worth 10x more now. C3g was selling for 14 Euro in 2005, then 25 Euro in 2010, 50 Euro in 2015, and now as I revise this text, 90 Euro in 2026.

C3g  Siemens NOS
Order Number:
114-146-50 
Year: 1965

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C3g. Long Life, finest low noise Audio tube, with gold pins, and individual series number.  C3g is a frame grid tube. (unlike C3m). Look at the excellent data it has:

C3g Pentode. connected

Triode connected
Gain 210 (WIth Ra=15k) 40
Ri 300k 2300 Ohms
Ia 13mA 17mA
Ua 220V 200V
Ug   -3.9V

Quantities of 50 pcs are packed in sealed  50pcs boxes.  Inside are individual boxed tubes. 

Info sheet about C3g-C3gS-C3m

Get a 16 page datasheet from out website, go to techcorner and click to "scanned datasheets".

C3gS Siemens NOS
Order Number:
114-147-63

S-Version with selected parameters. The S-Version is more tighter to the datasheet. My measurements have verified this is indeed so.

Info sheet about C3g-C3gS-C3m
C3g Valvo NOS
Order Number:
114-150-29
  
C3gS Valvo NOS
Order Number:
114-151-93
 S-Version with selected parameters. The S-Version is more tighter to the datasheet. My measurements have verified this is indeed so.
C3m  TFK NOS
Order Number:
114-081-39


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 One of the BEST (?) low noise audio tube ever made.   Ideal phono  tube. Low noise like a triode - amplification of a pentode.  With very nice TFK Logo engraved on the top.  

Info sheet about C3g-C3gS-C3m

Get the 16-page datasheet at our techcorner ( See website menu)

Very special Mesh tube  inside. 


C3m Siemens NOS
Order Number:
114-010-90

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One of the finest low noise audio tubes ever made.   Ideal phono  tube. Low noise like a triode - amplification of a pentode.  Most tubes are in military boxes, with date code, and Siemens order numbers on it, etc. 

Info sheet about C3g-C3gS-C3m

Get the 16-page datasheet at our techcorner ( See website menu)

Very special Mesh tube inside

D3a Siemens NOS

Order Number:
114-113-85


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This is another fabulous tube, like C3m, C3g, etc. It can be used pentode or triode mode. Triple Mica Version, gold pins. These are from a lot made by AEG Telefunken ULM, for Siemens. I can tell because I bought this lot directly as surplus. I have those in original sealed 100 pcs. master cartons. Each tube individually boxed. This is a FRAME GRID pentode. Extremely rare with tubes. So use it as a very high gain pentode, ideal for Moving Coil amplifier, or others that need lowest noise. Yet it can do high voltage as well. I have even seen it as current source in a mu stage, very successfully.

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 linar, and in triode mode this tube has a gain of 77x. How about that gain?! From the family of ECCxx tubes, I only find ECC83 which can do so, but ECC83 is very high impedance, and 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.

I have an original old pricelist. D3a had a factory price of 286DM one. That is 145 Euro. The factory was EAG Telefunken, and production was by them for Siemens. It was the most expensive small signal tube they made.

datasheets: TFK - Philips
E180F TESLA NOS
Order nr: 114-141-09

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 Packed in original bag. Beautiful Gold pin tube, also perfect in triode mode. Triode gain is 50, and Rp =2k3. For this price you can't go wrong! 3 Watt tube, wide wite flat cathode, for superb best linearity. SQ 10000h tubes, very tight to the specifications. Philips datasheet here . Link to external website, with computer made curves here.
ECH84 TESLA   NOS

1pcs each 7 Euro
Good printing, original box. Tests >100%. 
EF804S NOS

4pcs each 120 Euro

Telefunken NOS, Original box. With <>. Mint appearance.

EF804S NOS

4pcs each 80 Euro

 Siemens NOS, Original box. With <>. Mint appearance.
EF804S NOS

2pcs each 80 Euro

 Lorenz NOS, Original box. With <>. Mint appearance.
EF86  SIEMENS NOS

Year: 1967
1pcs each 35 Euro
Good printing, original box. Tests 3.5mA.   Good starts at 2.1mA 
EF86  Svetlana Winged C NOS


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Perfect new tubes from bulk pack
EF86 Tungsram NOS
1pcs each 31 Euro
Test >100%. Original box. 
EF86 Ultron NOS

1pcs each 22 Euro

Test >100%. Original box. 
EF86 NOS
RFT Neuhaus


2pcs each 35 Euro

Original quite old looking yellow-red mini watt boxes.  Tests >100% 

EF86 TESLA NOS

5pcs each 28 Euro
Original Blue Yellow Box. LOWER box in picture. LEFT tube in picture.

EF86 TESLA NOS

3pcs each 42 Euro

 Original Blue Yellow Box. UPPER box in picture. RIGHT tube in picture.
EF86  TFK NOS

2pcs each 55 Euro

NOS. One Original box, one white box. No <>
(EF86) CV4085 GEC, NOS, OB
United Kingdom
Year: 1980's
3pcs left

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By G.E.C. Valve. England. This is one of the finest EF86 ever made.

EF804/ EF804S NOS and USED

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EF806S TESLA NOS, OB
Order Number:
114-100-48

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 Upgrade version of EF86
EF184 Philips, NOS, OB

 

3pcs each 15 Euro

 

 

  


EL34 NOS

  

EL84 NOS
AEG, Germany
Year: 1970's

1pcs 15 €

Pair: NOS, OB
Order Nr: 114-160-29
Quad: NOS, OB
order Nr: 114-161-72

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Quad: NOS
Order Nr: 114-253-40
Year: 1960's

 

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 Reflektor with metallic print. Matched Quad from bulk pack. In white box, with matching data. .
Quad: NOS
Order Nr: 114-254-24
Year: 1960's

 

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 Reflektor with RED print. Matched Quad from bilk pack. In white box, with matching data. .

GU50 NOS, OB
Order Number:
114-043-09
CER. SOCKET
Order Number:
399-117-49
Year: 1980's

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Triode Mode curves of GU50

You like "another" tube than KT88.... try GU50 (similar to EL152).

This is very powerful tube. It can do 40 Watt continious and , 55 Watt Peak. (Full datasheet here). Good printing, original box. Absolutely excellent Audio tube. Military NOS quality, no commercial tube like KT88.

PICTURES + SCHEMATICS HERE

WE SELL THE SOCKET FOR THIS TUBE ALSO.

They're lower cost and compared to GU50, KT88 is only a consumer tube. GU50 is extremely strong and very low distortion. Amazing quality Russian military old stock.

Note: These cannot directly replace KT88, because the bias setting is another, and also the sockets are another type. We cannot help you with modifications, specially not when you have no idea how to do it. We can only give you the datasheet, and for if you know yourself how to do this. Well, it is easy to do for a specialist.

The bulb is hard glass. It has Four (!) getters, and inside made from hard metal. You can hammer a nail in the wall with this tube. Much different from the fragile KT88. The metal piece can be removed from the top, using a hot air gun, like you use for hair drying. Bake the top, and the glue will get soft then, and brittle away. The bakelit tops you can srew off, and are even nice feet for a small amplifier, no joke, these are lovely made.

THIS IS THE POOR MAN'S 300B

300B, 300B-XLS, 320B-XLS COMPATIBLE in Triode mode!

This is the poor man's 320B-XLS. Apart from the socket, and 12.6V indirect heater, this tube in Triode mode can replace 300B directly, and most 300B-XLS and 320B-XLS applications as long as you stay below 40Watt continious.

Continious
Dissipation
Peak
Dissipation
GU50
40W
55W

300B
36W
40W
300B-XLS
40W
65W
320B-XLS
40W
65W

Please check the Triode curves! They are not just a "little bit" triode like, as you may know from KT88 or EL34 in triode mode.

FIrst, these are PERFECT triode curves, you may wish all power triodes were like that. And second, they are like 300B and 2A3. So take any 300B or 2A3 circuit, and there you go!

NF2 Telefunken, NOS, OB
Order Number
125-109-92

6pcs each 22 Euro

SECRIT TIP. Also used by Jean Hiraga. Mint condition, Original Box tube. Some boxes still sealed since 1940.

See here fot AD1-NF2 Project. http://jacmusic.com/kits/index.htm
PL519, NOS, OB
Philips

1pcs each 35 Euro

 Original Box tube.
PL519, NOS, OB
Telefunken

1pcs each 55 Euro

 Original Box tube. On the glass it has "Made in Germany" and TFK Logo and Berlin datecode: B4004112.

SPECIAL
RE-tubes
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