Is the EC86 half of a 12AT7?

RE: Is the EC86 half of a 12AT7? , posted on June 28, 2017 at 18:10:32
Eli Duttman Audiophile Posts: 10455 Location: Monroe Township, NJ Joined: March 31, 2000	No, check the data sheet. The 6AB4 is 1/2 a 'T7. Eli D.

RE: Is the EC86 half of a 12AT7? , posted on June 28, 2017 at 21:01:42
DAK Audiophile Posts: 2712 Location: PACIFIC Joined: August 8, 2010	I saw the mu was close but the rest of the stuff was in German so it kinda gave me a headache trying to compare the 2 tubes. Danke for the input. regardestein, Dak

RE: Is the EC86 half of a 12AT7? , posted on June 29, 2017 at 15:46:39
krankkall Audiophile Posts: 296 Location: New Mexico Joined: April 5, 2014	I've used 6AB4 tubes in quite a number of DIY amplifiers. Always had good results, and since that particular tube is not that popular in audio or guitar amps.....CHEAP (RCA, TUNG-SOL USA, RFT, etc.) Steve

RE: Is the EC86 half of a 12AT7? , posted on June 29, 2017 at 15:47:26
krankkall Audiophile Posts: 296 Location: New Mexico Joined: April 5, 2014	I've used 7 pin 6AB4 tubes in quite a number of DIY amplifiers, instead of 9 pin 12at7 tubes. Always had good results, and since that particular tube is not that popular in audio or guitar amps.....CHEAP (RCA, TUNG-SOL USA, RFT, etc.) Steve

Anybody use the EC86?, posted on June 29, 2017 at 16:47:57
DAK Audiophile Posts: 2712 Location: PACIFIC Joined: August 8, 2010	tHEY have some nice SQ versions of that tube. Made by Amperex, Tele, S&H, etc.

RE: Anybody use the EC86?, posted on June 30, 2017 at 00:08:18

Eli Duttman
Audiophile

Posts: 10455
Location: Monroe Township, NJ
Joined: March 31, 2000

The data sheet tells the tale. The type resembles the 5842 and Russian 6C45П (6s45p). It's very high gm and intended for grounded grid UHF duty. I call tubes of this character "in box oscillators". To use such types in common cathode audio service, EXTRAORDINARY precautions against parasitic oscillation are necessary. Of course, the issue of microphonics is present.

IF parasitic oscillation and microphonics can be overcome, the EC86 should be excellent in a phono preamp's 1st gain block role.

Eli D.

EC86 Data Sheet

RE: Anybody use the EC86?, posted on June 30, 2017 at 03:34:15

Nunki
Audiophile

Posts: 644
Joined: November 27, 2010

jepp,

for instance here...

http://blog.boeses-vinyl.de/diy/phonopre-mk2b-mit-4-mal-6s3-ec86-nach-reinhard-hoffmann-innovative-audiode/bilder-und-vergleich-der-beiden-phono-mopeds.html

N.

RE: Anybody use the EC86?, posted on June 30, 2017 at 08:44:06
DAK Audiophile Posts: 2712 Location: PACIFIC Joined: August 8, 2010	Ok, thanks for the review. I am not good enough to know how the tubes electrical parameters translates into its role in an audio amplifier. I am gaining more knowledge but it is like learning a foreign language to me. But, practically i don't like using tubes that require a lot of assistance ( or extra circuitry) to keep them from misbehaving. cheers, Dak

RE: Anybody use the EC86?, posted on July 1, 2017 at 09:29:26

PakProtector
Audiophile

Posts: 12363
Joined: May 14, 2002

It really isn't too difficult to deal with these high gain/high gm tubes. I am running a TX-coupled linestage with 6S4Pi's in it, and have put 6S45's in it too. The carbon comp, 1/4W Xicon resistors from Mouser are quite effective.

I was warned early on that at some point I would encounter a situation that would leave me wishing I could break open the bottle and solder the stopper to the grid posts, but it hasn't happened yet...:)
cheers,
Douglas

Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.

RE: Anybody use the EC86?, posted on July 2, 2017 at 06:56:32
Cleantimestream Audiophile Posts: 7550 Location: Kentucky Joined: June 30, 2005	Mine are Dead quiet {5842} driving the lowly 45 finals into 105 db speakers. I have toyed with the idea of just clipping off the pins but is just too barbaric. The Mind has No Firewall~ U.S. Army War College.

Tubes Asylum

Is the EC86 half of a 12AT7?

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