[paradoxper]

Howza about the Horizon?

Horizon wasn't on my radar as I assumed it was not 300B, conflating it with TRP. However, a buddy has one on order so we may end up doing swaps considering many crossovers -- he's into Elrog and also has access to TM300B, the big snag is he's less into headphones.

 

[UntilThen]

Pacific is no small pocket change either.

I’m glad Yggdrasil is good enough and cheap enough for me.

 

[L0rdGwyn]

Tube DACs and tube phono stages FTW

I thought about a DHT circuit for my PCM63 DAC, but when it comes down to it DHT filament supplies are bulky and with high radiated magnetic fields, not so great for small signal applications like a DAC where low noise is paramount. Hopefully Lampizator has taken care to keep 60Hz noise decoupled from the audio output. That quad 300B DAC must be freaking huge.

 

[dminches]

The Horizon is a huge step up from the Pacific which is great as well. I traded by Pacific for an Horizon and am very pleased.

 

[bigjako]

Happy new owner of a second-hand Glenn using 2 x 6AS7s (or 5998/6336 via toggle) one 5U4G and one 6SN7. I have only had the chance to listen for a few minutes so far to make sure it's operable and the tubes didn't blow any cans, but the bass is beyond my expectations while still being crystal clear. I'm looking forward to tube-rolling this before I say much more about the sound.

This has a total of 4 tubes, which is much less than some of the models I've seen in this thread. I'm curious if anyone else with this version can tell me much about their experience or suggest some tube combos.

 

[Monsterzero]

Happy new owner of a second-hand Glenn using 2 x 6AS7s (or 5998/6336 via toggle) one 5U4G and one 6SN7. I have only had the chance to listen for a few minutes so far to make sure it's operable and the tubes didn't blow any cans, but the bass is beyond my expectations while still being crystal clear. I'm looking forward to tube-rolling this before I say much more about the sound.

This has a total of 4 tubes, which is much less than some of the models I've seen in this thread. I'm curious if anyone else with this version can tell me much about their experience or suggest some tube combos.

Congrats! Does yours have the 6/12/25v switch on the rear?

The only tube advice I can offer is to invest in a 6J5 adapter and ditch the 6sn7 tubes (except for the TS BGRP)

 

[bigjako]

Congrats! Does yours have the 6/12/25v switch on the rear?

The only tube advice I can offer is to invest in a 6J5 adapter and ditch the 6sn7 tubes (except for the TS BGRP)

Thank you! Appreciate that. The only switch I have on the rear is labeled 6AS7 / 5998 & 6337, so I assume I'm fixed on the 6v setting.

Why do you suggest ditching the 6SN7s? I have a lot of new and NOS 6SN7s so I was looking forward to swapping them in and seeing the impact (currently, I have a new Linlai 6SN7 in it but looking forward to trying some NOS Sylvanias and Shuguang Treasures I already have. I have no gain issue, it's plenty loud.

 

[Monsterzero]

Thank you! Appreciate that. The only switch I have on the rear is labeled 6AS7 / 5998 & 6337, so I assume I'm fixed on the 6v setting.

Why do you suggest ditching the 6SN7s? I have a lot of new and NOS 6SN7s so I was looking forward to swapping them in and seeing the impact (currently, I have a new Linlai 6SN7 in it but looking forward to trying some NOS Sylvanias and Shuguang Treasures I already have. I have no gain issue, it's plenty loud.

Yeah, so your amp has the 5998 switch, which mine did not have. Those that had it couldn't hear any difference, but in theory that switch should be active when using 5998s.

Regarding 6J5 vs. 6SN7....

A 6J5 is one half of a 6SN7, so you need two. The benefit of using 6J5 over 6SN7 used to be two fold,
Price. 6J5s used to be cheaper than 6SN7s, but that has changed since all of the GOTL owners started raving about them, and now prices of a pair of 6J5s is not much cheaper than their 6SN7 equivelant, but with a little pattience you can still find good deals.

What hasn't changed however is that a pair of 6J5s simply sound better than 6SN7s, and that opinion is shared almost universally. Much better imaging and seperation and better staging.
You might want to read thru this thread and familiarize yourself with the 6J5.
The Tung Sol BG RP ( best 6SN7 in the GOTL IMO) doesnt have a 6J5 equivelant unfortunately, but most of the rest do.

 

[robo24]

Thank you! Appreciate that. The only switch I have on the rear is labeled 6AS7 / 5998 & 6337, so I assume I'm fixed on the 6v setting.

Why do you suggest ditching the 6SN7s? I have a lot of new and NOS 6SN7s so I was looking forward to swapping them in and seeing the impact (currently, I have a new Linlai 6SN7 in it but looking forward to trying some NOS Sylvanias and Shuguang Treasures I already have. I have no gain issue, it's plenty loud.

While I agree with @Monsterzero that an adapter is the way to go, when I do use my 6SN7 socket, my favorites have been Mullard ECC33 and RCA 5692 red base.

 

[heliosphann]

Someone hook a brother up with some 6J5 pairs. Got an adapter with no tubez!

 

[bigjako]

Thank you, now I have a fresh rabbit hole to dive into.

 

[Monsterzero]

Someone hook a brother up with some 6J5 pairs. Got an adapter with no tubez!

Billington has GEC L63s and National Unions can be found on eBay. Those and Fivre 6j5 are my personal favs.
I have a pair of Zenith 6c5 that are good as well.

 

[gibosi]

Thank you, now I have a fresh rabbit hole to dive into.

And what kind of rectifiers did you get with the Glenn? A 5U4G is borderline with two 6AS7G. The amp wants 250mA while the 5U4G can provide at most 225mA. Using them will probably be OK for awhile, but don't be surprised if one fails. The 5U4GB is OK, but they don't seem to get much love.

Check Dubstep Girls's thread to get more ideas:

https://www.head-fi.org/threads/dub...mparison-rectifer-tube-rolling-thread.694525/

 

[heliosphann]

Billington has GEC L63s and National Unions can be found on eBay. Those and Fivre 6j5 are my personal favs.
I have a pair of Zenith 6c5 that are good as well.

I need some cheap ones. @zach915m keeps taking all my money.

 

[bigjako]

And what kind of rectifiers did you get with the Glenn? A 5U4G is borderline with two 6AS7G. The amp wants 250mA while the 5U4G can provide at most 225mA. Using them will probably be OK for awhile, but don't be surprised if one fails. The 5U4GB is OK, but they don't seem to get much love.

I have a few 5U4Gs (two vintage Tung-Sols, a Ken-Rad, an RCA and a Winged C that I plan to also roll into a Stratus I just picked up) and the Glenn itself came with a 3DG4, which I'm not familiar with. Would the 3DG4 be better? I see from DubStepGirl's thread that the 3DG4s are specially suited for the Glenn so I will swap that out (it says "The rectifier used by 2359Glenn in his OTL amp. This tube has different specifications from the other rectifiers and probably won't work in most 5U4G applications (3 Volts as well as a different pin layout, as of now, only compatible with 2359Glenn amps and other DIY amps)"

I swapped an old Sylvania 6SN7 in tonight and seem to hear / feel some kind of flutter or static so I'm currently listening on cheapo cans to avoid blowing out a ZMF.

Edit: swapped the Sylvania 6SN7 for a new-ish Shuguang Treasure and put in an ITT 3DG4, no flutter or static. Slightly harsher I think.