[billerb1]

The Tung-Sol with the partial black glass came from India (that insanely fast $15 shipping). Didn't you get a pair?

Yeah that's them. Problem was I got them when I was loaded up with so many new tubes, quite a few of them didn't really get a legitimate listen. That pair and quite a few others from recommendations from rnros need to get back in the saddle.
They all seem to have their own redeeming qualities.

 

[rnros]

As I browse the back pages I am fascinated by Thurston's Tung Sol 6C8Gs. What's the final verdict on them?

I'm seeing a few people with Ken-Rads. Is it the Canadian seller?

These are the ones I use and recommend. Highly recommend! : ) Original military box states '43, tube is actually '44. Ridiculous low price for these.
They do need 60 to 80 hrs to reach full potential.
https://www.ebay.com/itm/152925021627?ViewItem=&item=152925021627

Also have the Tung Sol, very good; National Union, very good, Sylvania, also good but haven't spent much time with it.
But I prefer the Ken Rad, and I especially recommend them if you listen to classical/orchestral where an even hand across the FR is important.
The 6C8G will also project a larger, detailed soundstage, so good recordings are a little bit closer to actual concert hall experience.
And of course that means concert hall experience with good seats! Direct waves from orchestra hit first, with acoustic character of hall in a supporting role.

Some previous discussion:
https://www.head-fi.org/threads/schiit-mjolnir-2-listening-impressions.778250/page-162#post-14003486

 

[koover]

These are the ones I use and recommend. Highly recommend! : ) Original military box states '43, tube is actually '44. Ridiculous low price for these.
They do need 60 to 80 hrs to reach full potential.
https://www.ebay.com/itm/152925021627?ViewItem=&item=152925021627

Also have the Tung Sol, very good; National Union, very good, Sylvania, also good but haven't spent much time with it.
But I prefer the Ken Rad, and I especially recommend them if you listen to classical/orchestral where an even hand across the FR is important.
The 6C8G will also project a larger, detailed soundstage, so good recordings are a little bit closer to actual concert hall experience.
And of course that means concert hall experience with good seats! Direct waves from orchestra hit first, with acoustic character of hall in a supporting role.

Some previous discussion:
https://www.head-fi.org/threads/schiit-mjolnir-2-listening-impressions.778250/page-162#post-14003486

Is there a link for the correct and best adapters? Correct me if I'm wrong but I'll need 2 sets for the LYR2 because they're too big to reach over the top of the amp? This is new territory for me and don't know what adapters everyone is using. I'd like to try these out if they're inexpensive and that good. If it's too much trouble and no response for a while, I'll have to do my due diligence and search.

 

[rnros]

Is there a link for the correct and best adapters? Correct me if I'm wrong but I'll need 2 sets for the LYR2 because they're too big to reach over the top of the amp? This is new territory for me and don't know what adapters everyone is using. I'd like to try these out if they're inexpensive and that good. If it's too much trouble and no response for a while, I'll have to do my due diligence and search.

No trouble. You need two socket savers for each tube to reach the top of the chassis, then you use the 6C8G/6F8G adapter.
https://www.ebay.com/itm/1pc-Gold-plated-6F8G-instead-ECC88-6922-6N6-6N11-tube-adapter/191554130619?

I use an O-Ring at the top of the socket savers to hold them nice and tight against the chassis.

 

[Phantaminum]

These are the ones I use and recommend. Highly recommend! : ) Original military box states '43, tube is actually '44. Ridiculous low price for these.
They do need 60 to 80 hrs to reach full potential.
https://www.ebay.com/itm/152925021627?ViewItem=&item=152925021627

Also have the Tung Sol, very good; National Union, very good, Sylvania, also good but haven't spent much time with it.
But I prefer the Ken Rad, and I especially recommend them if you listen to classical/orchestral where an even hand across the FR is important.
The 6C8G will also project a larger, detailed soundstage, so good recordings are a little bit closer to actual concert hall experience.
And of course that means concert hall experience with good seats! Direct waves from orchestra hit first, with acoustic character of hall in a supporting role.

Some previous discussion:
https://www.head-fi.org/threads/schiit-mjolnir-2-listening-impressions.778250/page-162#post-14003486

Before I flick the switch and you see me run out of my place as if an extra from the Backdraft movie.

 

[rnros]

Do it. Wear some protective gear and do it!

 

[gardibolt]

These are the ones I use and recommend. Highly recommend! : ) Original military box states '43, tube is actually '44. Ridiculous low price for these.
They do need 60 to 80 hrs to reach full potential.
https://www.ebay.com/itm/152925021627?ViewItem=&item=152925021627

Also have the Tung Sol, very good; National Union, very good, Sylvania, also good but haven't spent much time with it.
But I prefer the Ken Rad, and I especially recommend them if you listen to classical/orchestral where an even hand across the FR is important.
The 6C8G will also project a larger, detailed soundstage, so good recordings are a little bit closer to actual concert hall experience.
And of course that means concert hall experience with good seats! Direct waves from orchestra hit first, with acoustic character of hall in a supporting role.

Some previous discussion:
https://www.head-fi.org/threads/schiit-mjolnir-2-listening-impressions.778250/page-162#post-14003486

Excellent information, thanks.

 

[TK16]

Took out my 59 Foton's and put in my pair of Reflektor 59/60 6N3P for some burn in. Those Foton's are easily the Best Russian tubes I ever heard.

 

[bamaskery]

Hey all, it seems like you have a pretty good discussion going. I just picked up a used Lyr 2. I had first tried out a early 60s Amperex 6922 and orange globe 6dj8. I found the sound with both a bit disjointed as if there were somehow gaps in the frequency range. I tried a warmer tube Matsushita 6dj8 and found the tone and coherence much better. I suspect this may also be why the 396a is so highly recommended for this amp. I had previously used a Morgan Jones diy OTL clone with 3 6922/6dj8s so the Lyr 2 sounds a lot different than that! The Amperex and Siemens options are definitely my favorites for that amp. I will probably try some Mullards once I match up a pair from what I have on hand. Per the advice here, I also picked up some adapters since I have a bunch of 2c51/5670 from having MHDT dacs in the past. Thanks for all the impressions! This thread has been helpful.

 

[TK16]

Hey all, it seems like you have a pretty good discussion going. I just picked up a used Lyr 2. I had first tried out a early 60s Amperex 6922 and orange globe 6dj8. I found the sound with both a bit disjointed as if there were somehow gaps in the frequency range. I tried a warmer tube Matsu****a 6dj8 and found the tone and coherence much better. I suspect this may also be why the 396a is so highly recommended for this amp. I had previously used a Morgan Jones diy OTL clone with 3 6922/6dj8s so the Lyr 2 sounds a lot different than that! The Amperex and Siemens options are definitely my favorites for that amp. I will probably try some Mullards once I match up a pair from what I have on hand. Per the advice here, I also picked up some adapters since I have a bunch of 2c51/5670 from having MHDT dacs in the past. Thanks for all the impressions! This thread has been helpful.

I had 6 pair of Mullards, then I tried the Western Electric 396A, sold or gave away 4 pair of them. Kept the best 2 pair but have not listened to them in a long time. I was a huge fan of the Mullards. The Orange Globes are rather mediocre. Give the Tung Sol 2C51 a shot. Killer midrange.

 

[L0rdGwyn]

So, after building and loving me a Bottlehead Crack, decided to go full OTL, sold my Lyr 2. "But what will I do with all of my precious 5670's?" Well, got a new amp, problem solved: the new iteration Feliks Audio Espressivo MKII. Been rolling 5670's for a few hours...man, this amp is making me rethink these Tung Sol 2C51's, they never wowed me before. Think I remember @billerb1 saying they were his best in the Woo Audio WA2, maybe these benefit from an OTL topology? Not sure, but oh boy I am diggin' it

 

[bamaskery]

Thanks for the feedback, I think I have almost every 2c51/5670 variant except the Bendix 6385, so I appreciate the guidance on which to try with the Lyr. 10+ years ago when the Paradisea was released, you could find pretty much any 2c51/5670 except WE 396a and 6385 for peanuts, but it seems the prices have gone up a bit. I have some TS labeled as 2c51/396a. Do you happen to know if these are any different than the regular TS 2c51. Cheers

 

[Phantaminum]

So, after building and loving me a Bottlehead Crack, decided to go full OTL, sold my Lyr 2. "But what will I do with all of my precious 5670's?" Well, got a new amp, problem solved: the new iteration Feliks Audio Espressivo MKII. Been rolling 5670's for a few hours...man, this amp is making me rethink these Tung Sol 2C51's, they never wowed me before. Think I remember @billerb1 saying they were his best in the Woo Audio WA2, maybe these benefit from an OTL topology? Not sure, but oh boy I am diggin' it

I've been following that thread. The Espressivo MKII had me very curious about it before I went a different OTL route. Definitely wanted to purchase one just so I could still roll all of these 6922/2C51 variants.

How are you liking it?

 

[L0rdGwyn]

I've been following that thread. The Espressivo MKII had me very curious about it before I went a different OTL route. Definitely wanted to purchase one just so I could still roll all of these 6922/2C51 variants.

How are you likin git?

First impressions are very good, but its only been a few hours. Going to give it some more time before making any final judgments. I also have several different NOS 6N6P-type output tubes on the way too, so it isn't even in its final form

Since there isn't very much info out there on the amp, once I've found my "best" input/output tube pairing, I am going to do a head-to-head comparison against my Bottlehead Crack + Speedball with some TOTL tubes (Mullard CV4003 input, Western Electric 421A output).

 

[TK16]

Thanks for the feedback, I think I have almost every 2c51/5670 variant except the Bendix 6385, so I appreciate the guidance on which to try with the Lyr. 10+ years ago when the Paradisea was released, you could find pretty much any 2c51/5670 except WE 396a and 6385 for peanuts, but it seems the prices have gone up a bit. I
have some TS labeled as 2c51/396a. Do you happen to know if these are any different than the regular TS 2c51. Cheers

They are the same got WE with 2C51/396A paint.