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Schiit Lyr - The tube rolling thread - Page 327  

post #4891 of 8735
Quote:
Originally Posted by drumsnspace View Post

Sorry, I'm new to tubes and headphone hi-fi, perhaps I should've worded it a bit more clearly. One tube was emitting an incessant high pitched whine. I already have tube dampers, and last night while the tube was still being noisy, and moved the damper around and got it to stop, but it came a back a few times. Today, I had no issues. My question is, can a tube be noisy then stop?

Yes.

Cheers!beerchug.gif

-HK sends

post #4892 of 8735
Quote:
Originally Posted by drumsnspace View Post

Sorry, I'm new to tubes and headphone hi-fi, perhaps I should've worded it a bit more clearly. One tube was emitting an incessant high pitched whine. I already have tube dampers, and last night while the tube was still being noisy, and moved the damper around and got it to stop, but it came a back a few times. Today, I had no issues. My question is, can a tube be noisy then stop?  

 

I thought I would toss a few things into the ring regarding tube break-in microphonic noise and various hissing and crackling noises. 

 

Microphonic Noise

As others have already stated, almost all tubes are to some degree microphonic and if you tap on them you will usually hear it. Personally, I would suggest not making it a regular practice to tap on vacuum tubes.  

 

There are some vendors that grade their NOS Tubes for low noise/microphonics.  I believe this tube grading is done by plugging the tubes into a high gain circuit like a phono stage and listening.  I know that Upscale Audio sells three grades of tubes and the platinum are very low in microphonics and sold at a premium price.  Another vendor Vintage Tube Services grades their tubes in 4 levels http://vintagetubeservices.com/page6.html the quieter the tube the higher the price. So, you can take your chances on e-bay, (I have had mixed results myself) or you can pay a premium to get ultra quiet tubes that are also matched and balanced to very close levels.

 

 

 

Tube Break-in 

Brent Jessee Recording sends along a nice tube FAQ when you order from him. He states that most NOS tubes need a minimum 48-hour break-in and some may take up to 100-hours. He also notes that small signal tubes (6JD8) can on some occasions make strange noises (Hiss, Pop, Crackle) and they they often clear up after the break-in period.  He also notes another common cause of this noise phenomenon is dirty connections on the tube pins. So, in some cases a good cleaning may be in order. Of course cleaning the contacts without messing up the painted label on the tube can be a bit tricky.

 

Hope that helps.

 

 

-edit removed tube damper section.

 

- edit fixed misspelling of Brent Jessee.


Edited by bsn - 1/12/13 at 11:16am
post #4893 of 8735
Quote:
Originally Posted by Fearless1 View Post

Here are a set of the tubes that I have raved endlessly about, I am not sure if they are as good as mine(nos, cryo) but if they are 2/3rds as good they would still be the best I have heard

 

.http://www.ebay.com/itm/2-X-E188CC-RTC-GOLD-PIN-NOS-NIB-TUBE-LOT-1-/261151201993?_trksid=p5197.m1992&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D14%26meid%3D4804155852274070612%26pid%3D100015%26prg%3D1006%26rk%3D1%26sd%3D261151201993%26

Fear,

 

Got a set.

Thanks

post #4894 of 8735
Quote:
Originally Posted by bsn View Post

 

I thought I would toss a few things into the ring regarding tube break-in microphonic noise and various hissing and crackling noises. 

 

Microphonic Noise

As others have already stated, almost all tubes are to some degree microphonic and if you tap on them you will usually hear it. Personally, I would suggest not making it a regular practice to tap on vacuum tubes.  

 

There are some vendors that grade their NOS Tubes for low noise/microphonics.  I believe this tube grading is done by plugging the tubes into a high gain circuit like a phono stage and listening.  I know that Upscale Audio sells three grades of tubes and the platinum are very low in microphonics and sold at a premium price.  Another vendor Vintage Tube Services grades their tubes in 4 levels http://vintagetubeservices.com/page6.html the quieter the tube the higher the price. So, you can take your chances on e-bay, (I have had mixed results myself) or you can pay a premium to get ultra quiet tubes that are also matched and balanced to very close levels.

 

 

 

Tube Break-in 

Brent Jessie Recording sends along a nice tube FAQ when you order from him. He states that most NOS tubes need a minimum 48-hour break-in and some may take up to 100-hours. He also notes that small signal tubes (6JD8) can on some occasions make strange noises (Hiss, Pop, Crackle) and they they often clear up after the break-in period.  He also notes another common cause of this noise phenomenon is dirty connections on the tube pins. So, in some cases a good cleaning may be in order. Of course cleaning the contacts without messing up the painted label on the tube can be a bit tricky.

 

Hope that helps.

 

 

-edit removed tube damper section.

Another very helpful post from a roller denizen

I appreciate it.

post #4895 of 8735

Thank you BSN, excellent discussion regarding tube performance,  I'm awaiting delivery of French Mazda's 6922 to install on Lyr from Brent Jessie Recording.

Brent does not offer the different grades of tubes but based on past experience his tubes are excellent.

post #4896 of 8735
Quote:
Originally Posted by Iamnothim View Post

Fear,

 

Got a set.

Thanks

Let me know your thoughts.

post #4897 of 8735
Quote:
Originally Posted by Iamnothim View Post

Another very helpful post from a roller denizen

I appreciate it.

If anyone noticed, I wanted to say that I am sorry about all the edits I made on that last post. My current set of eyeglasses are in the shop getting fixed and I am wearing an older pair with a different prescription. My vision is off a bit and my eyes are having some challenges with these smaller font's.  I just remembered that Command + + makes things bigger on the Mac.   blink.gif

 

 

I will try to keep the edits down to a minimum. 


Edited by bsn - 1/12/13 at 11:07am
post #4898 of 8735
Quote:
Originally Posted by bsn View Post

If anyone noticed, I wanted to say that I am sorry about all the edits I made on that last post. My current set of eyeglasses are in the shop getting fixed and I am wearing an older pair with a different prescription. My vision is off a bit and my eyes are having some challenges with these smaller font's.  I just remembered that Command + + makes things bigger on the Mac.   blink.gif

 

 

I will try to keep the edits down to a minimum. 

yeah right..... edits, glasses.

 

I've already used those excuses.

As such, I state that whatever I type is incorrect upfront.

post #4899 of 8735
Quote:
Originally Posted by hifimiami View Post

Thank you BSN, excellent discussion regarding tube performance,  I'm awaiting delivery of French Mazda's 6922 to install on Lyr from Brent Jessie Recording.

Brent does not offer the different grades of tubes but based on past experience his tubes are excellent.

Yes, sometimes you can score some really good deals on e-bay, but sometimes you also get what you pay for.  I have had good results from both Brent Jessee and Vintage Tube Services. 

post #4900 of 8735
Quote:
Originally Posted by Iamnothim View Post

yeah right..... edits, glasses.

 

I've already used those excuses.

As such, I state that whatever I type is incorrect upfront.

I might have to borrow your disclaimer for a few days. 

post #4901 of 8735

One of you guys owes me $65 for sniping my RTC auction, with 6 seconds left.

Then... Going to the other RTC auction that ends 4 minutes later and getting them for $10 less.

 

 

 

 


Edited by Iamnothim - 1/12/13 at 11:45am
post #4902 of 8735
Quote:
Originally Posted by Iamnothim View Post

One of you guys owes me $65 for sniping my RTC auction, with 6 seconds left.

Then... Going to the other RTC auction that ends 4 minutes later and getting them for $10 less.

 

 

 

Yea. And I don't even have Lyr....Yet.... Sucka. tongue.gif

post #4903 of 8735

Don't look at me this time...I've had to lay off of getting more tubes due to cash shortage.frown.gif  I even had to pass on ckc527's rare Valvo PCC88 D-Getter tubes...and I really wanted those.frown.gif

 

Cheers!beerchug.gif

-HK sends

post #4904 of 8735
Quote:
Originally Posted by HK_sends View Post

Don't look at me this time...I've had to lay off of getting more tubes due to cash shortage.frown.gif  I even had to pass on ckc527's rare Valvo PCC88 D-Getter tubes...and I really wanted those.frown.gif

 

Cheers!beerchug.gif

-HK sends


No worries...I'm sure those D-getter Valvo's are going to a good home. wink_face.gif

post #4905 of 8735
Quote:
Originally Posted by OldSkool View Post


No worries...I'm sure those D-getter Valvo's are going to a good home. wink_face.gif

Please let me know how they sound...tongue.gif

 

Cheers!beerchug.gif

-HK sends

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