FS: ECC81 "Super Tubes" 6414, 6829 - 10,000 Hours Life Span

[User211]

Raytheon 6414 and GE 6829 ECC81 equivalents.

Both rated at 10,000 hours+ lifespans. Both sounded great in my Lampizator Level 4. They are used, but were NOS. I doubt the usage will have any significant effect on the super long lifespans. They will outlast you even with heavy usage, I suspect.

One pair of the 6829s have no usage whatsoever. Not sure which. At most none of these tubes will have had more than 100 hours - I was always rolling them with other types too.

http://i1101.photobucket.com/albums/g436/User_211/EAR%20868PL/DSC02550_zpsedqvblby.jpg

http://i1101.photobucket.com/albums/g436/User_211/EAR%20868PL/DSC02557_zpslem32l5b.jpg

The awesome Raytheon 6414 black plates below.

http://i1101.photobucket.com/albums/g436/User_211/EAR%20868PL/DSC02556_zpslicnyrpu.jpg

GE grey plates, almost as equally awesome I reckon. A bit more euphonic than 6414.

http://i1101.photobucket.com/albums/g436/User_211/EAR%20868PL/DSC02551_zpsmz5xuula.jpg

I will sell the 6414 and 6829 as two pairs. Or if you want 4 6829s I'll sell you all 6 valves.

Price in next post.

These are taller than ECC81 so make sure you have the space.

[User211]

Price, looking on ebay USA - I'd say £50 including P&P seems fair for two 6829 and two 6414. £65 for all four 6829 and the two 6414.

Get Googling - these are excellent valves.

[User211]

6414:
An industrial, computer rated dual triode,virtually the same specs as the E180CC or 7062 listed above. Unlike the E180CC, this tube was made in the USA. It is a more rugged build, with the Raytheon blackplate type sporting triple mica and military ratings. This tube is also like a 12AV7 and will work wonders in any 12AT7 spot, and may be just the ticket if you want to boost the gain of a 12AU7 circuit. The 6414 is getting very hard to find, but with a 10,000 hour heater rating you may never need a replacement. Discussion groups rate this type very highly for use in headphone amps. Stands about 1/2 inch taller than the standard 12AT7.

6829:
Yet another industrial tube that is very similar to the 5965. This one has a mu factor of 47 so it is slightly lower than the typical 12AT7. Those I have heard are rich, detailed, warm, and thanks to the lower mu, very quiet and low in microphonics. GE made these in their 5-star and military line so they are a rugged and long lasting tube. Like the E180CC, this tube is about a half-inch taller than the 12AT7, so you need to consider overhead chassis or cabinet space when swapping a 12AT7 with one of these. An excellent audio bargain now, but prices may soon climb as audiophiles discover them!

http://www.audiotubes.com/12at7.htm

[User211]

12AT7 = ECC81 in case you are confused.

[User211]

Opps - I see no evidence to support 6829 having a 10,000 life, whereas I do for 6414. My mistake.:mental:

[User211]

Raytheon price increased by £10 in a no sell shock, horror situation.

[User211]

Price back down again in a more sensible post. Like stocks and shares, this. I dunno.

£40 (2 6829, 2 6414) and £55 (4 6829, 2 6414) respectively.

[User211]

Bump