Stock) Russian 6P14P-EV as translated from Cyrillic. It is a military build that meets or exceeds the USA made specifications. Preferred Series tubes. Name, 6P14P. Type, Output pentode. Application, LF power amplification. Cathode type, oxide,indirect heating. Envelope, glass,miniature. Mass,g, Filament. 6P14P (6П14П) Pinout. No information available. 6P14P (6П14П) Substitutes. No information available. 6P14P (6П14П) Ratings. No information available.

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Main thing, the tubes work, and if it goes wrong we replace them, they say.

This is really special. It was originally designed for the military to have datqsheet audio tube with low-microphonics, and not having to use the lower quality EL84 radio tube for this.

The 6P14P-EB deals with all of these problems at the same time. Matching in pairs or quads in included in the price. A good alternative is the EI EL84, which sometimes can be found. Also vice versa, this datasgeet. This will lead unavoidably to a wider spread in tube parameters.

EL84 Only differences are listed here when identical, it is not listed.

The longer lifetime can be achieved by using more expensive materials. This “resistor” injects a 50Hz ripple signal from the filament to the cathode.

The lower microphonics are reached by using double layer mica, which gives better stability to the system.

Then you end up with tubes that have lower parameters for everyting. In terms of eatasheet, there is one very important observation I made many datahseet before. They do not throw away tubes that are on the edge of the specs, but also not throw away over-stocked or not so well stored production materials. The tighter tolerance for plate current can be achieved with simply better adjustment of the tubes, before putting them in the glass bulb.


It was never before available for commercial use. Others pick out the higher DC current values as if those are better, and if somebody has a Hickok tester, he’ll pick out those with higher transconductance as that’s all he can see. Only differences are listed here when identical, it is not listed. Hum will start at kOhm or lower. Even so, Chinese factories make it a sport, continuously tweak the processes for using cheaper materials, and leave steps and control away.

These low cost materials produce contaminating residues when the tube gets older. A similar situation we have for the Philips EL84, also a fantastic tube, but expensive. So if parameters of a lot are the same, the higher expectations you can have to the base quality of that lot.

The standard EL84 has actually not a very high lifetime, it can be microphonic, and is produced with an almost unacceptable wide range of plate current. So I make a distribution, and then I see immediately of some values are missing.

TDSL Tube data [6P14P ]

This tube dattasheet to be very expensive when it was made! If you know about tubes, you will immediately recognize the is very special. Actually it makes datasehet sense, but some people pick out the center values, as if those are better. NOS stocks of this tube have been released for public sales only recently, and stocks are low.


The table below is an extract from it. If tubes of a lot appear all identical, this promises best quality.

What is the best EL84 to buy? 6P14P-EB!

Perhaps not many of the readers had the chance to compare lots pcs original packed NOS tubes with each other, or compare such lots with pcs of new made tubes. Or better said, not use lower cost materials, of which the low cost EL84 is made of. WIth the tubes comes a four page original printed data sheet, listing in full detail the excellent specifications of this tube, in Russian. So I take from tubes randomly 6 tubes. Generally it can be said, just this is the weakness of Chinese tubes.

In that was sure Telefunken.

6P14P-EV = EL84 = 7189 = 6BQ5 tube. Output pentode

They throw nothing away. What is the best EL84 to buy? So when you find 6 random tubes to be very strong, BUT they are all totally different, this is good, but not ideal.