12AU7 Tubes

[shadowlight]

Thanks to everyone for the recommendation.  Will research some more and get a pair or two to try.

[Lizard_king]

I use late 1950's Tung Sol 5814a ( military version of the 12au7) tubes in my amp for inputs and drivers. I love these tubes.

Guys:

I know that many of you have done some tube rolling in preamps.  I am wondering what you have found to be your favorite 12AU7 Tubes? 

Thanks,

Ken

[Response Audio]

Hey Deepak,
The Bella Pre will show the difference in all the tubes you try. The circuit was designed in such a way that everything within the chain will bring forth a noticable change.

I have never been one to recommend the use of NOS tube (as it is personal and expensive) but I won't use anything but NOS in the Purity units. BIG difference as compared to anything current production.

[etcarroll]

Does he have some RCA cleartops?

I am pigging backing on the thread.  Looking for 12au7 tubes which could help tame some of the highs on gr-research/av123 ls6 and provide a bit wider stage.  The pre in question is response audio bella l/p.

TIA
-Deepak

Dee try the Mullard CV4003 from upscale. That is what I use . Call me , I know someone who has a ton of 12AU7's for you to try.

[evan1]

Does he have some RCA cleartops?

I am pigging backing on the thread.  Looking for 12au7 tubes which could help tame some of the highs on gr-research/av123 ls6 and provide a bit wider stage.  The pre in question is response audio bella l/p.

TIA
-Deepak

Dee try the Mullard CV4003 from upscale. That is what I use . Call me , I know someone who has a ton of 12AU7's for you to try.

very expensive ones

[Response Audio]

Hey Deepak,
A good tube to try in your application would be a pair of Raytheon (spelling?). My favorite tube of all my NOS 12AU7 types for a warmer presentation are a pair of Baldwin 5814's (made for Baldwin by Raytheon).

The RFT, IMO is not as warm. These were the tubes used in the Purity Reference in the Von Schweikert room as RMAF.

[evan1]

Does he have some RCA cleartops?

I am pigging backing on the thread.  Looking for 12au7 tubes which could help tame some of the highs on gr-research/av123 ls6 and provide a bit wider stage.  The pre in question is response audio bella l/p.

TIA
-Deepak

Dee try the Mullard CV4003 from upscale. That is what I use . Call me , I know someone who has a ton of 12AU7's for you to try.

very expensive ones

my bad . he has  the black plates. try ltr317

[shadowlight]

Hey Deepak,
A good tube to try in your application would be a pair of Raytheon (spelling?). My favorite tube of all my NOS 12AU7 types for a warmer presentation are a pair of Baldwin 5814's (made for Baldwin by Raytheon).

The RFT, IMO is not as warm. These were the tubes used in the Purity Reference in the Von Schweikert room as RMAF.

Thanks for everyone's recommendation.  Here are some 12au7 tubes that I have picked up:

Raytheon Black Plates Tubes made for Hammond Organ
JHS Sylvania 6189/12au7wa/5814WA
Sylvania 12au7 with Gold/Yellow lettering
RCA 5814WA Black Plates
RCA Black Plates made for Conn Organ
Couple of Marconi and GE tubes

I think I have enough to roll for next couple of months 

Bill, is it possible to use 12av7 with the Bella?

[mfsoa]

RFT 

[evan1]

Here's a link

http://www.nostubestore.com/2010/10/telefunken-12au7ecc82-ribbed-plates.html

[etcarroll]

Here's a link

http://www.nostubestore.com/2010/10/telefunken-12au7ecc82-ribbed-plates.html

Thanks Evan for link, order placed.

[evan1]

Here's a link

http://www.nostubestore.com/2010/10/telefunken-12au7ecc82-ribbed-plates.html

Thanks Evan for link, order placed.

What did you order ?

[rollo]

Marconis ? would love to try them myself. Great tube.


charles

[shadowlight]

Marconis ? would love to try them myself. Great tube.


charles

Charles,

They are canadian version of used marconis that I picked up from ebay.  Let me know if you want to try them and I can send them along.

[Triode Pete]

Need to try these...

http://cgi.ebay.com/NOS-MEGA-RARE-BRIMAR-ECC82-12AU7-6067-BVA-CV3987-TUBE-/190456894480?pt=Vintage_Electronics_R2&hash=item2c581d9410