Schiit Lyr 3 Tube rolling thread.....

Mar 30, 2019 at 5:00 AM Post #3,211 of 5,270
My understanding is that the ECC33 is a very close match to 6SN7 and can be used safely in a Lyr 3 (I've run quite a few for quite awhile in mine).

The ECC32 (probably best known for the Mullard coke-bottle shaped tube) has different electrical characteristics (somebody here can elaborate I'm sure) that make it a bit risky to use in a Lyr 3. That being said, I've used a couple in my Lyr 3 (the Mullard coke-bottle one and a Cossor ECC33) without any problems.

The ECC32 uses 0.95 amps of heater current (regular 6SN7 uses 0.6 amps, so just over 50% more). Seems a bit risky as the Lyr3 is built for 6SN7 standard, but nice to know that it seems able to handle it :)

The ECC33 on the other hand, uses only 0.4 amps so it certainly is safe to use and might even have the Lyr3 running a bit cooler than usual :)

ECC33: https://www.radiomuseum.org/tubes/tube_ecc33.html
ECC32: https://www.radiomuseum.org/tubes/tube_ecc32.html
 
Mar 30, 2019 at 5:53 AM Post #3,212 of 5,270
The ECC32 uses 0.95 amps of heater current (regular 6SN7 uses 0.6 amps, so just over 50% more). Seems a bit risky as the Lyr3 is built for 6SN7 standard, but nice to know that it seems able to handle it :)

The ECC33 on the other hand, uses only 0.4 amps so it certainly is safe to use and might even have the Lyr3 running a bit cooler than usual :)

ECC33: https://www.radiomuseum.org/tubes/tube_ecc33.html
ECC32: https://www.radiomuseum.org/tubes/tube_ecc32.html
You'd better contact Shiit Audio before use it. Ask them what's the heat current the amp can handle. It may not kill your transformer immdiately, but who knows in the long run.
 
Mar 30, 2019 at 5:57 AM Post #3,213 of 5,270
You'd better contact Shiit Audio before use it. Ask them what's the heat current the amp can handle. It may not kill your transformer immdiately, but who knows in the long run.
Schiit only gives short answers and says use only 6SN7. I would love to know for sure, and until then only the 6SN7 goes in my amp.
 
Mar 30, 2019 at 6:08 AM Post #3,214 of 5,270
Keep it cool. :)

SchiitHead
Friend
Variance in operating temperature will be dramatically affected by room temperature, ventilation, whether or not the product is sitting on top of another one, whether or not a card is installed, and, most of all, subjective perception. What I consider "warm," most people will think is painful. Best to use a FLIR or IR thermometer when in doubt.

Lyr will run 15-20 degrees C above ambient, depending on how the air is moving, humidity, etc. With a card, maybe 2-5 degrees C more. All bets are off if it's sitting on top of an already warm surface (hot plate, different component, computer, etc.)
 
Mar 30, 2019 at 7:51 AM Post #3,215 of 5,270
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Mar 30, 2019 at 2:32 PM Post #3,216 of 5,270
Lyr will run 15-20 degrees C above ambient, depending on how the air is moving, humidity, etc. With a card, maybe 2-5 degrees C more. All bets are off if it's sitting on top of an already warm surface (hot plate, different component, computer, etc.)

For fun, I measured various points on the Lyr3 using multimeter with a small contact temperature sensor. Ambient temperature here is about 23°C, and the Lyr is just above 40°C on top, just over 50°C on the bottom, and the tube varies up to just under 70°C on its hottest spot near the top. No other hot surfaces/equipment nearby.
 
Mar 30, 2019 at 4:41 PM Post #3,217 of 5,270
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Mar 30, 2019 at 7:24 PM Post #3,218 of 5,270
I used an infrared thermometer a while back on a 211 tube (as pictured above) and got 251C. That's 485F to us 'Mericans. :slight_smile:

That happens to be around the ideal temperature for cooking a steak, coincidence?
 
Mar 31, 2019 at 11:52 AM Post #3,219 of 5,270
Back to old tube bliss? Bought A Reliatron D-getter from @ProfFalkin when he retired from 6SN7 duties. Swapped it into my Lyr 3 in place of the Psvane 6SN7-UK I had there. Finding that it makes the Lyr 3 just enough warmer and smoother to bring out more the more melodic jazz and classical works I've been listening to this weekend. My other amp, the Apex Peak with Psvane 6SN7-SE, has still wider and deeper stage, but the tone of Lyr3 + D-getter is lovely.
 
Mar 31, 2019 at 12:53 PM Post #3,220 of 5,270
Back to old tube bliss? Bought A Reliatron D-getter from @ProfFalkin when he retired from 6SN7 duties. Swapped it into my Lyr 3 in place of the Psvane 6SN7-UK I had there. Finding that it makes the Lyr 3 just enough warmer and smoother to bring out more the more melodic jazz and classical works I've been listening to this weekend. My other amp, the Apex Peak with Psvane 6SN7-SE, has still wider and deeper stage, but the tone of Lyr3 + D-getter is lovely.
More impressions: the D-getter seems to my ears to make busy orchestral passages less muddled compared with other tubes I've used in the Lyr 3. Still far from my downstairs speaker system (see sig) but surprisingly clean nevertheless. You pay a price, though, sound stage is more 2D than with some other tubes, everything seems on a vertical plane right in front of my eyes (with MrSpeakers Ether C Flow 1.1 as always).
 
Apr 3, 2019 at 5:10 AM Post #3,221 of 5,270
Hmm, so the thread has more than 200 pages and I am really not able to read it all. So my question is. Is there any new tube production, where the tubes sounds great in Lyr3? I am new to tubes and little disoriented. I don`t want to buy 50 years old tubes if there is new production with great sonic qualities.

Just to mention, I am using Lyr3 with LCD-2C and I am listening to electronic music, indie pop/rock and movie soundtracks.
 
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Apr 3, 2019 at 5:23 AM Post #3,222 of 5,270
Hmm, so the thread has more than 200 pages and I am really not able to read it all. So my question is. Is there any new tube production, where the tubes sounds great in Lyr3? I am new to tubes and little disoriented. I don`t want to buy 50 years old tubes if there is new production with great sonic qualities.

Just to mention, I am using Lyr3 with LCD-2C and I am listening to electronic music, indie pop/rock and movie soundtracks.

Psvane are new and have good reputation. A bit on the more expensive side, but the "UK" model is reasonable, alas only sold in pairs. Here:
http://psvanetube.com/wordpress/purchase/shop-by-tube-model/6sn7-aka-cv181/
 
Apr 3, 2019 at 7:10 AM Post #3,223 of 5,270
Hmm, so the thread has more than 200 pages and I am really not able to read it all. So my question is. Is there any new tube production, where the tubes sounds great in Lyr3? I am new to tubes and little disoriented. I don`t want to buy 50 years old tubes if there is new production with great sonic qualities.

Just to mention, I am using Lyr3 with LCD-2C and I am listening to electronic music, indie pop/rock and movie soundtracks.

The Russian new production Tung-Sol 6SN7 which is one of the stock options when ordering Lyr3 certainly is no slouch. I’m thoroughly enjoying it in my Lyr3 using HD6XX :)

I’m interested in trying the other new production tubes out there as well, but I have only gotten as far as to the Psvane UK-6SN7. Compared to that one I actually prefer the Tung-Sol.

It might feel daunting to go through 200+ pages of posts, but I would recommend it. Not only for the tube tips but for the excellent and much entertaining humour supplied by people like @Ripper2860 @bcowen @ProfFalkin and others :grinning:

Oh, and welcome to head-fi (sorry about your wallet) :D
 
Apr 3, 2019 at 7:16 AM Post #3,224 of 5,270
JJ Electronic and Sophia Electric are also making new 6SN7.
 

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