[Wes S]

One of my favorites, just lovely in my MJ2 or VH2.

Awesome!

 

[Wes S]

12au7/12at7 to 6922 Adapters are out for delivery!

This is going to be a fun weekend and here are the first 3 sets of tubes that will be rolled. The first 2 pairs are as rare as they come, and the 3rd pair is very unique.

Raytheon 7730 Long Plate D Getter

Valvo Hamburg ECC82 Long Plate Foil D Getter 56'

Brimar CV4033

Happy Rolling and Listening!

 

[Wes S]

Oh my word! These Brimar CV4033 tubes are freaking legit!

 

[Ripper2860]

Happy to hear that, Wes. I know I love mine on VH2 -- maybe even a bit more than the CV-4034.

 

[Wes S]

Happy to hear that, Wes. I know I love mine on VH2 -- maybe even a bit more than the CV-4034.

Thanks bro! I plan to roll the CV4034 as well for comparison. However, that might be a while as it's gonna be hard for me to pull these CV4033, because they sound so good that I can't stop listening. It's gonna be a late night . . .

 

[Zwarteziel]

Hi all,

earlier this day, I asked a question about rolling tubes on a Valhalla 1 on reddit. I was pointed at this thread, so I hope someone can help me with the following:

I’ve owned the Valhalla for quite some time and have always used it to drive a Sennheiser HD650. I have generally liked the sound of it and haven’t really desired upgrading or changing things. Recently however, I have been given a set of matched “JJ E88CC 6299 Gold” tubes, which I understand can be used as inputs in the Valhalla version 2.
I would like to know if they can be used in my earlier model as well. I'm afraid of damaging my amp or the tubes.

I've contacted Schiit and they stated that: "As long as the voltages line up and the tubes are the equivalent to what the originals were, you should be able to". I like tube amps and their aesthetics, but am very unfamiliar with the way the electronics work or how I judge the tubes' individual characteristics. My first question would simply be: Has someone perhaps already tried rolling these tubes in the Valhalla?

I am currently also trying to learn how tubes work and what their characteristics mean, but I could use some help. I looked up the characteristics of my current input-tubes (6N1P’s) and the ones I’ve been given (JJ E88CC 6299’s). While a lot of values differ, I am wondering which ones are crucial for their correct operation? I live in Europe, so the amp runs of the 220v mains.

Here's some stuff I've compared:

Charateristic	E88CC	6N1P	Unit
Vh (heater voltage)	6,3	6,3	V
If (heater current)	300	600	mA
Va (DC plate voltage, I think?)	90	250	V
Ia	15	7,5	mA
-Vg1	?	7,5	mA
S	12.5	4.4	mA/V
µ	33	35
Ri (= gm = plate resistance?)	2.6	4.4	K Ohm
Req.	300	?
Va max.	220	300	V
Ik max.	20	25	mA
Pa max.	2.0 / 1.5	?	W
Rg1 max.	1.0	0.5	M Ohm

My second question would be: what charateristics would be essential in comparing the tubes (Vh, If and Va?)

Thank you kindly for any answers.

 

[Wes S]

So, I spent all night listening with the CV4033 in the V2, and I have never heard music sound so lifelike ever. This tube in the V2 with my Atticus is unreal! The impact, holographic stage, tonality and timbre are all on another level compared to all the other tubes I own. I honestly knew they were going to be good, but I did not expect this. I literally can feel the notes as they hang in the air and I feel like I can reach out and touch the musicians and their instruments. At first listen, I stood up and closed my eyes and got a bit dizzy, as it was so hard to tell if I was there with the musicians or in my room. The sound literally feels like it expands out into the entire room, and the headphones just disappear. This is what I call "tube magic" and the CV4033 has it in spades. Sounds come at me from all directions and the projection of sound is incredibly deep from front to back, and really gives the holographic effect like no other tubes. Also, I am hearing things in the recording I have never heard, even with my "cap modded" Liquid Platinum, "Holy Grail" 12AU7's and Aelous combo and there is zero harshness or fatigue. I still have some hours to go for complete burn in, but what I am hearing so far is fantastic and I can't imagine it getting any better.

I bought 3 versions of the CV4033 available from Tubemonger, and I am set for life.

For anyone looking for "next level" type of sound with their V2, I highly suggest you find some adapters and buy the CV4033 tubes from Tubemonger. I have a bunch of "Holy Grail" level tubes, and none of them even come close to what the CV4033 can do as far as sounding holographic, impactful and lifelike.

I woke up at 3:30 am and actually took the day off work, so I can spend all day getting acquainted with my new favorite setup. Listening to this setup is an amazing experience, that I just can't get enough of!

Quboz HiRez > Bluesound Node 2i > Schiit Gungnir Multibit > Valhalla 2 with CV4033 > ZMF Atticus w/ Norne Draug 3s > = "End Game"

 

[GumbyDammit223]

So, I spent all night listening with the CV4033 in the V2, and I have never heard music sound so lifelike ever. This tube in the V2 with my Atticus is unreal! The impact, holographic stage, tonality and timbre are all on another level compared to all the other tubes I own. I honestly knew they were going to be good, but I did not expect this. I literally can feel the notes as they hang in the air and I feel like I can reach out and touch the musicians and their instruments. At first listen, I stood up and closed my eyes and got a bit dizzy, as it was so hard to tell if I was there with the musicians or in my room. The sound literally feels like it expands out into the entire room, and the headphones just disappear. This is what I call "tube magic" and the CV4033 has it in spades. Sounds come at me from all directions and the projection of sound is incredibly deep from front to back, and really gives the holographic effect like no other tubes. Also, I am hearing things in the recording I have never heard, even with my "cap modded" Liquid Platinum, "Holy Grail" 12AU7's and Aelous combo and there is zero harshness or fatigue. I still have some hours to go for complete burn in, but what I am hearing so far is fantastic and I can't imagine it getting any better.

I bought 3 versions of the CV4033 available from Tubemonger, and I am set for life.



For anyone looking for "next level" type of sound with their V2, I highly suggest you find some adapters and buy the CV4033 tubes from Tubemonger. I have a bunch of "Holy Grail" level tubes, and none of them even come close to what the CV4033 can do as far as sounding holographic, impactful and lifelike.

I woke up at 3:30 am and actually took the day off work, so I can spend all day getting acquainted with my new favorite setup. Listening to this setup is an amazing experience, that I just can't get enough of!

Quboz HiRez > Bluesound Node 2i > Schiit Gungnir Multibit > Valhalla 2 with CV4033 > ZMF Atticus w/ Norne Draug 3s > = "End Game"

Gee, thanks... Now you're going to make me spend more money on tubes! Do you have a recommendation on adapters? I guess this is as good of reason as any to spend some of that "stimulus" money!

 

[GumbyDammit223]

Oh my word! These Brimar CV4033 tubes are freaking legit!

Oh, and another question - how are those labels handling the heat? Are you leaving them on, or eventually removing them before they burn off?

 

[G0rt]

Oh, and another question - how are those labels handling the heat? Are you leaving them on, or eventually removing them before they burn off?

I've used these (same as the rightmost in the photo) in my MJ2 almost exclusively for the last year or so, and the labels are immune to the heat.

I have another pair in the rotation for my VH2. They're very, very good.

 

[Wes S]

The labels are staying on mine and add some serious character to the look of the tube. These labels were last triple checked and written on back in 1960, and how cool is that! The amount of time and testing that went into these tubes is amazing, and especially for the price. As @G0rt said, they are fine with heat.

This combo sounds hauntingly lifelike!

ZMF Atticus > Valhalla 2 w/ CV4033 60'

 

[GumbyDammit223]

The labels are staying on mine and add some serious character to the look of the tube. These labels were last triple checked and written on back in 1960, and how cool is that! The amount of time and testing that went into these tubes is amazing, and especially for the price. As @G0rt said, they are fine with heat.



This combo sounds hauntingly lifelike!

ZMF Atticus > Valhalla 2 w/ CV4033 60'

Where did you get the tube adapters? I couldn't find anything through my search this morning.

 

[Wes S]

Where did you get the tube adapters? I couldn't find anything through my search this morning.

Tubemonger.
https://www.tubemonger.com/12Axx_to...IB_1960s_p/12axx-ecc88-adap-novib-mcmurdo.htm

They are currently out of stock, but told me they should be back in stock in a couple of weeks.

 

[GumbyDammit223]

Tubemonger.
https://www.tubemonger.com/12Axx_to...IB_1960s_p/12axx-ecc88-adap-novib-mcmurdo.htm

They are currently out of stock, but told me they should be back in stock in a couple of weeks.

Sweet! Thanks!

 

[Wes S]

If any tube rollers are looking for some killer 6922’s and variants, I have listed some of my "Holy Grail" versions in the classifieds, at very good prices.

https://www.head-fi.org/threads/tubes-for-sale-holy-grail-6922’s-and-variants-priced-to-sell.951868/