EL84M specs.

[GeirW]

Gday.

Someone have or know where i can find the datasheet
of the sovtek 84M, haven`t had any luck in my search.
The only words i can find, is this:

The Sovtek EL84M's extended voltage tolerance, improved plate dissipation, and rugged construction make it equivalent to the RCA 7189. Chosen by Matchless for their designs, the EL84M also features higher transconductance, more power, and longer life than the less expensive EL84, making it perfect for hi-end audio applications. However, many musician's prefer the regular EL84's warm distortion to the EL84M's tighter, cleaner tone. For all HiFi users, the EL84M is definitely the tube of choice.

Ahh yes, 2005 is here, anyone feel any diff.
🙂

 

[argo]

EL84M = Russian 6P14P-EV (6n14n-EB) so search for these 😉

http://www.tubes.ru/techinfo/HiFiAudio/6p14pev.html

Argo

 

[GeirW]

Gday.

TnX. argo.
Do you happen to know of a .pdf file.?
btw. "6P14P-EV" , i guess this means the naming EL84
comes from, either labeled for europe,
or manufactured on lisence.?

 

[argo]

Gday.

TnX. argo.
Do you happen to know of a .pdf file.?

Not that I'm aware of. But I have found this gif file for 6P14P.http://klausmobile.narod.ru/td/data/_6p14p.GIF

The added letters EV just means:

E - high reliability tube (military)
V - long life tube (military)

btw. "6P14P-EV" , i guess this means the naming EL84
comes from, either labeled for europe,
or manufactured on lisence.?

Russian EL84 and EL84M are made Reflector Corp, Saratov and are marketed by New Sensor Co. under the "Sovtek" brand name. Some of these may have been relabeled, some made especially for export - go figure?
Manufactured on licence - I doubt it, usually the soviets just plain copied the western production.
By the way you can find good info about Russian tubes on these sites: http://klausmobile.narod.ru/ and
http://digilander.libero.it/paeng/

 

[fdegrove]

Hi,

You could say the EL84M (M for Military?) is to the Russians what the E84L/7320 is to Europeans/Americans.

The tube also differs mechanically from the standard 6P14P.

Soundwise its no match for the E84L of renowned European manufacturers of yesteryear but it does sound better than the standard run of the mill 6P14P however IME.

Compare it, if you like, to a 6922 (6N23-EV) which isn't a match either for the better E88CC but still a very decent tube nonetheless.

Cheers,😉

 

[argo]

Frank, I kind of hoped you would step in.
How would you rate the sound of 6N14P-EV to… lets say Tesla's or Ei’s current production EL84. I have heard, that among Russian diy-ers or guitar players the 6N14P-EV is not so well regarded.


Argo

 

[fdegrove]

Hi,

How would you rate the sound of 6N14P-EV to… lets say Tesla's or Ei’s current production EL84.

All in all it tends to sound a little bit dryer, less harmonically rich if you prefer, with a slightly more extended top-end.

Here it's quite popular with owners of vintage EL84 PP amps where it tends to balance the sound well giving these amps a more "modern" sound so to speak.

I have no idea how the guitar amp people see it overhere but they often hold views that are diametrically opposed to audio users. Nothing against that BTW, just an observation.

All in all I feel this tube is a good investment as its not too pricey and should last for ages if not pushed over it's limits.

Cheers, 😉

 

[argo]

As a slight drift from the topic, I have access to many NOS 6P14P-EV's and to some other Russian popular types as well. Willing to trade if anybody is interested. Good Russian level prices. 😉

Argo

 

[irondutchess]

One of the main differences between an EL84 & EL85M is that an EL84 has a maximum plate voltage of 300V, and the EL84M is 500V. Other differences include longer life and robustness to withstand military use.

 

[TG]

EL84 has a maximum plate voltage of 300V, and the EL84M is 500V.

That's incorrect.
6P14P and 6P14P-EV have the same maximum operating plate voltages (300V at 8W and above, 400V below 8W). For the 6P14P-EV/EL84M the maximum plate voltage of 500V is also specified for the "closed" tube (no plate current due to cold heaters or extreme negative bias voltage) to meet the -E requirement (lifespan of 5000+ hours). For the "plain" 6P14P it is not specified, but that doesn't mean it cannot withstand 500V - it's actually exactly the opposite: apply as much as you wish, just don't expect 5000 hours.
Soviet "long life" tubes always have more conservative ratings to meet the lifespan criteria.

 

[irondutchess]

EL84 Many folks ask what the difference is between the standard EL84 and the more expensive Sovtek EL84M.

 

[TG]

Again: while 6P14P-EV/EL84M is indeed more internally rugged and generally more reliable, this does not include any improved manufacturer's voltage or power ratings.

 

[fdegrove]

Hi,

@TG: That's absolutely correct.

Cheers, 😉