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Schiit Lyr - The tube rolling thread
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Apr 9, 2013 at 10:28 AM Post #6,286 of 8,735
Quote:
flisker said:
USN-CEP 6922 ??? What the h... is this number. I really need to find some list of all possibly compatible tube types 
tongue_smile.gif

 
Also may I ask you guys to check out this video and tell me if noise my Lyr is doing is "normal" ? 
 

 
If it's not normal than I guess it might be because I'am using US version in EU (of course with AC-AC transformer) but there is 50Hz instead of 60Hz in the wall.
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You can search this thread, that will give you all the info you need!
 
The tubes I'm talking about are Amperex USN-CEP 6922.  NOS tubes show up on eBay pretty regularly.  I paid $185 for the last matched pair of NOS tubes I picked up.
 
My Lyr doesn't make that noise.  Do you hear it in your headphones?  It sounds like a transformer buzzing to me.  I did read that early versions of the Lyr had an issue with transformer buzz, but I also read that those problems had been resolved.  Perhaps the fix that they came up with doesn't work with the line frequency in Europe?  Or maybe your amp was one made before they put the fix into place?
 
At any rate, I'd send the guys at Schiit an email, their customer service is top notch!
 
Apr 9, 2013 at 10:52 AM Post #6,287 of 8,735
Quote:
nelamvr6 said:
 
 
You can search this thread, that will give you all the info you need!
 
The tubes I'm talking about are Amperex USN-CEP 6922.  NOS tubes show up on eBay pretty regularly.  I paid $185 for the last matched pair of NOS tubes I picked up.
 
My Lyr doesn't make that noise.  Do you hear it in your headphones?  It sounds like a transformer buzzing to me.  I did read that early versions of the Lyr had an issue with transformer buzz, but I also read that those problems had been resolved.  Perhaps the fix that they came up with doesn't work with the line frequency in Europe?  Or maybe your amp was one made before they put the fix into place?
 
At any rate, I'd send the guys at Schiit an email, their customer service is top notch!
Click to expand...

That noise may be coming from a ground loop.
 
Apr 9, 2013 at 11:14 AM Post #6,288 of 8,735
Quote:
nelamvr6 said:
 
 
You can search this thread, that will give you all the info you need!
 
The tubes I'm talking about are Amperex USN-CEP 6922.  NOS tubes show up on eBay pretty regularly.  I paid $185 for the last matched pair of NOS tubes I picked up.
 
My Lyr doesn't make that noise.  Do you hear it in your headphones?  It sounds like a transformer buzzing to me.  I did read that early versions of the Lyr had an issue with transformer buzz, but I also read that those problems had been resolved.  Perhaps the fix that they came up with doesn't work with the line frequency in Europe?  Or maybe your amp was one made before they put the fix into place?
 
At any rate, I'd send the guys at Schiit an email, their customer service is top notch!
Click to expand...

 
No it's not in headphones it's just the amp itself. Actually I doesn't bother me much, can't even hear it with headphones on.
 
Will ask Jason about this than :)
 
That noise may be coming from a ground loop. - Have no idea what this does mean tbh 
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Apr 9, 2013 at 11:29 AM Post #6,289 of 8,735
Quote:
oicwutudidthar said:
That noise may be coming from a ground loop.
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I've certainly head ground loops that were audible through the equipment, that is, the sound comes out of the speakers or the headphone.  
 
But I've never heard a ground loop that could cause the kind of vibration where you can hear the buzz just by putting your ear near the box...
 
Apr 9, 2013 at 1:03 PM Post #6,290 of 8,735
Quote:
flisker said:
I was thinking... anybody has list of Lyr compatible tube types ?
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This is from the Schiit website:
 
Quote:
Lyr ships with either new-production JJ ECC88 tubes or NOS GE 6BZ7 tubes, but feel free to substitute any 6DJ8, 6922, ECC88, 6BZ7, CV2492, CV2493, or 6N1P type tube, new or old, American or Russian or Chinese.
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Some other probably work as well.
 
Apr 9, 2013 at 1:35 PM Post #6,292 of 8,735
More tubes that work:
 
6N23P
7DJ8/PCC88
6ES8/ECC189
7ES8/PCC189
6BQ7A
ECC85/6AQ8 (Similar to 6N1P)
E80CC (Draws ALOT of heater current, use at own risk) Not pin compatible, needs an adaptor.
CCa
7308
6CG7/6FQ7/6GU7
 
Probably a lot more but i haven't looked into all of them yet.
 
Apr 9, 2013 at 2:26 PM Post #6,293 of 8,735
Apr 9, 2013 at 2:31 PM Post #6,294 of 8,735
Apr 9, 2013 at 2:32 PM Post #6,295 of 8,735
Apr 9, 2013 at 6:54 PM Post #6,298 of 8,735
My Lorentz SEL PCC88 on Lyr sounds equivalent to stock GE tube which has been just broken-in.
I need to wait and review the Lorentz pair when they are fully broken in.
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Apr 9, 2013 at 7:08 PM Post #6,299 of 8,735
I like these Brit Brimar 6BQ7A in my woo....not sure if anyone has tried them in the Lyr. They are Brit, and they are cheap. Mine have zero microphonics....can whack them with a sick and they are quiet. Plus they sound nice. :)
http://www.ebay.com/itm/NOS-NIB-Pair-Brimar-6BQ7A-Box-Plate-Vacuum-Tubes-/160997414278?pt=Vintage_Electronics_R2&hash=item257c319586


ilikepooters said:
More tubes that work:

6N23P
7DJ8/PCC88
6ES8/ECC189
7ES8/PCC189
6BQ7A
ECC85/6AQ8 (Similar to 6N1P)
E80CC (Draws ALOT of heater current, use at own risk)
CCa
7308
6CG7/6FQ7/6GU7


Probably a lot more but i haven't looked into all of them yet.
Click to expand...
 
Apr 9, 2013 at 10:06 PM Post #6,300 of 8,735
Lorentz SEL PCC88 generates a weak popcorn noise on one side, which is obviously hearable by HE-5LE at volume 12 o'clock.
I never heard from the stock GE tubes.
Sounding thinner than Bugle boy 6DJ8 and GE stock tubes.
 
What is the nature of the popcorn sound?
When I changed to Bugle boy 6DJ8, it is disappear.
 
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