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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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 datashedt. This adds to the input signal and will be amplified by the tube.

Index of /images/eBay/eBay_De/OROSZ csovek/= Datasheets/6P14P

Or better said, not use lower cost materials, of which datqsheet low cost EL84 is made of. So when you find 6 random tubes to be very strong, BUT they are all totally different, this is good, but not ideal.

They throw nothing away. Then you end up with tubes that have lower parameters for everyting. Matching in pairs or quads in included in the price.

NOS stocks of this tube have been released for public sales only recently, and stocks are low. EL84 Only differences are listed here when identical, it is not listed. Hum will start at kOhm or lower. The table below is an extract from it. If tubes of a lot appear datwsheet identical, this promises best quality. The 6P14P-EB deals with all datasjeet these problems at the same time. So I take from tubes randomly 6 tubes.

After hours they begin to wear out, and they are worth not much any more. Also vice versa, this applies. In terms of quality, there is one very important observation I made many times before. This is really special. The tighter tolerance for plate current can be achieved with simply better adjustment of the tubes, before putting them in the glass bulb.

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Also you can see if somebody picked out specific values, it’s not necesarily a bad lot, but you can never say why he wanted to have those that he picked out, and why he did not want to have those that he sold. WIth the tubes comes a four page original printed data sheet, listing in full detail the excellent specifications of this tube, in Russian.

Index of /images/eBay/eBay_De/OROSZ csovek/= Datasheets/6P14P

This picking makes little sense, but it does get a problem when stocks have been picked from multiple times. It was never before available for commercial use. Generally it can be said, just this is the weakness of Chinese tubes. So I make a distribution, and then I see immediately of some values are missing. Perhaps not many of the readers had the chance to datazheet lots pcs original packed NOS tubes with each other, or compare such lots with pcs datasheet new made tubes. So whatever the situation, I prefer such lots that have not been picked from.

Only differences are listed here when identical, it is not listed. 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 datasueet be microphonic, and is produced with an almost unacceptable wide range of plate current. Now, for the 6P14P-EB Actually it makes little sense, but some people pick out the center values, as if those are better.

A similar situation we have for the Philips EL84, also a fantastic tube, but expensive. 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.

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It was originally designed for the military to have long-life audio tube with low-microphonics, and not having to use the lower quality EL84 radio tube for this.

These low cost materials produce contaminating residues when the tube gets older. Main thing, the tubes work, and if it goes wrong we replace them, they say. A datashete alternative is the EI EL84, which sometimes can be found. With standard EL84, plate current ranges from an estimated 30mA to 90mA. What is the best EL84 to buy? In that was sure Telefunken.

This lot may have lower lifetime, and problem dataseet is highter.

electron Tube Data sheets – 6

If you know about tubes, you will immediately recognize the is very special. Like a box of getters was in contact with air too long, etc. This “resistor” injects a 50Hz ripple signal from the filament to the cathode.

The longer lifetime can be achieved by using more expensive materials. This will lead unavoidably to a wider spread in tube parameters. The lower microphonics are reached by using double layer mica, which gives better stability to the system. Even so, Chinese factories make it a sport, continuously tweak the processes for using cheaper materials, and leave steps and control away.

This tube used to be very expensive when it was made!