[triod750]

https://audiokarma.org/forums/index...us-of-the-ei-tube-factory.511056/post-6666596
I have not checked elsewhere.

 

[Xcalibur255]

Nice to see people enjoying their gear. I'm taking a forced break from mine at the moment. A new house was built next to me and the electricians did something to the distro box that feeds my place and ever since then every piece of audio equipment I own sounds terrible now. I'm currently researching to see how much I can salvage the situation through power conditioning, a rabbit hole that I've previously peered down into a few times, gone "eh, nope" and moved on.

 

[bigjako]

Lookie here, I think side-by-side Glenn's are a rare site. I recently picked up this 10-tube SS-rectified Glenn and am looking forward to tube-rolling it and comparing it to my current 4-tube tube-rectified Glenn. Two on the table, one will go on to a better home - I'm just not sure which one yet. I finally got the tube-rectified one into a great place and found some near-silent.

For those with 4 or 6 power tube spots, a question - could I use a pair of 6ASG7s AND a pair of 6080s? I know I could use 2 pairs of 6080s or 2 pairs of 6AS7Gs, but can I use a pair of each?

 

[triod750]

https://www.jacmusic.com/techcorner/ARTICLES/English/EI-FACTORY/EI-index.html
Now I have checked elsewhere. I recognize a spool of silk spun pure copper wire in a photo of his. This was used before enameled copper wire. Larger diameter wire was isolated by twisted paper in electric motors and such, transformers for instance. I have some of that silk spun wire and the silk is in between beige and pink in colour and pretty strong.

 

[mordy]

Lookie here, I think side-by-side Glenn's are a rare site. I recently picked up this 10-tube SS-rectified Glenn and am looking forward to tube-rolling it and comparing it to my current 4-tube tube-rectified Glenn. Two on the table, one will go on to a better home - I'm just not sure which one yet. I finally got the tube-rectified one into a great place and found some near-silent.

For those with 4 or 6 power tube spots, a question - could I use a pair of 6ASG7s AND a pair of 6080s? I know I could use 2 pairs of 6080s or 2 pairs of 6AS7Gs, but can I use a pair of each?

No problem mixing power tubes as long as they are in pairs. The only limitation is the total current draw of all the tubes including a tube rectifier if you have one - max 13A total.

 

[goldwerger]

Nice to see people enjoying their gear. I'm taking a forced break from mine at the moment. A new house was built next to me and the electricians did something to the distro box that feeds my place and ever since then every piece of audio equipment I own sounds terrible now. I'm currently researching to see how much I can salvage the situation through power conditioning, a rabbit hole that I've previously peered down into a few times, gone "eh, nope" and moved on.

Never tried so have no first-hand experience, or opinion, of it - but for your specific use case, may be worth researching PS Audio power regenerator. I think the principle of its engineering - which is to regenerate a clean AC - may be what you need. Good luck...

 

[leftside]

Lookie here, I think side-by-side Glenn's are a rare site. I recently picked up this 10-tube SS-rectified Glenn and am looking forward to tube-rolling it and comparing it to my current 4-tube tube-rectified Glenn. Two on the table, one will go on to a better home - I'm just not sure which one yet. I finally got the tube-rectified one into a great place and found some near-silent.

For those with 4 or 6 power tube spots, a question - could I use a pair of 6ASG7s AND a pair of 6080s? I know I could use 2 pairs of 6080s or 2 pairs of 6AS7Gs, but can I use a pair of each?

If you can afford it, and have the room, keep both of them. I don't think we'll see any more made.

 

[Xcalibur255]

Never tried so have no first-hand experience, or opinion, of it - but for your specific use case, may be worth researching PS Audio power regenerator. I think the principle of its engineering - which is to regenerate a clean AC - may be what you need. Good luck...

I'm leaning towards the isolation transformer route right now, but like everything in audio there are cheeleaders and booers for every type of passive and active filtering so it's hard to know what will be effective.

 

[goldwerger]

I'm leaning towards the isolation transformer route right now, but like everything in audio there are cheeleaders and booers for every type of passive and active filtering so it's hard to know what will be effective.

only way to find out is experiment... theory is theory, practice is practice... good luck!!!

 

[gibosi]

Just received a pair of Telefunken EL41 and rolled them in with a pair of Chatham 6520 and a Holland-made GZ34. Sounds good but it's too soon to say much more.

 

[gibosi]

A rather obscure double triode: 1642 / 2C21 / 38233.

https://www.radiomuseum.org/tubes/tube_1642.html



To date, I have found RCA and KenRad. Raytheon also made it, but it's pretty rare. So not much tube rolling. And the adapters cost more than the tubes! lol



Sounds very good, but it might not be worth chasing these, unless you are craving something a bit different.

 

[gibosi]

It's been pretty quiet here recently....

A pair of Tung-Sol 6520 used as output, one Hitachi 6KN8 double triode as input and a Sylvania 5931 rectifier.

 

[Xcalibur255]

This Tung-Sol branded 3DG4 has been in almost continuous operation in the amp since about 2012. I only really rolled rectifiers during the first year then decided to keep the 3DG4 as a known quantity and stick to rolling the other tubes. Especially in recent years the amp is on 8 hours a day at work, so I continue to be amazed at how this rectifier keeps going and going.

 

[gibosi]

Picked up a Raytheon RK33, which is essentially the equivalent of the RCA and Ken-Rad 1642 / 2C21 / 38233, but with a ceramic base, as pictured above. Sounds good!

 

[dminches]

I wish I could be involved in the discussion but Glenn has had my amp for 4 years now and I don't think I am ever getting it back.