Tube Rolling w/Crack
- Thread starter Dr. Toobz
- Start date
Colonl_Charisma
New member
I recently bought a new power tube for my Crack, and it occasionally makes a whistling/high-pitched noise. The noise is clearly audible if I put my ear near the tube (no headphones on), and when I put my headphones on the noise is coming through both channels. Never had this occur before.
Should I let the tube burn in for awhile?
Should I let the tube burn in for awhile?
Colonl_Charisma
New member
Yep, tapping the tube seems to fix the issue. This really only happens right after I turn the amp on. After it has been burning for a few minutes it stops making the noise.
kill_surf_city
New member
Colonl_Charisma said:
i'm having the opposite issue. my noise isn't there initially. but after being on for a while it starts up until i tap it.
mcandmar
New member
Its just one of those things, i have a few 5998's that do that too. Adding those damping rings to the outside of the tube can be enough to stop it. I think its cause by the subtle vibration of the power transformer, which in turn gets the grid wires singing at the right frequency. I have used a number of microphonic tubes, but these are the only ones i have seen that just start to sing without provication.
Colonl_Charisma
New member
I appreciate the responses mcandmar and Doc. After the first couple days of letting the tube burn, I've had no issues with the 6AS7G tube.
Paul Joppa
Moderator
Since brands vary with the market prices, you might want to identify the ones you have first. Just sayin' ...
Markkr
New member
I’m relatively new to tubes, still watching videos and reading blogs as I don't really have much of a foundation in understanding them. I only have the tubes included with the C2A kit.
My hope is a list of 6080’s and 12au7’s that would be considered worthy of trying to experience differences in tubes. (While I learn more about them)
My hope is a list of 6080’s and 12au7’s that would be considered worthy of trying to experience differences in tubes. (While I learn more about them)
Colonl_Charisma
New member
Here is a link I have found very useful in my tube rolling experience. Jeb (who has posted in the BH forum in the past) did an extensive review of 6080, 12AU7, and 6AS7 tubes over at Super Best Audio Friends. As always, these are subjective reviews, and based off what his ears told him. This was a good starting point for me, and it helped me when buying some tubes that I wanted to try out.
https://www.superbestaudiofriends.org/index.php?threads/bottlehead-crack.120/page-3#post-13651
https://www.superbestaudiofriends.org/index.php?threads/bottlehead-crack.120/page-3#post-13651
Colonl_Charisma
New member
You're welcome!
BondDaBoom
New member
Hi I'm new here been into audio hobby since my twenties. Started with solid state until I got my first tube amp. Recently I bought a fully loaded Crack and am loving it. I'm wondering about philips 7316 on price of $390. I won't spend that kinda money on small tube unless it really performs.
I wish I could use my Baldwin 12ax7 but I guess it requires more voltage then the Crack provides? Currently running a Baldwin 12au7 and rca 6as7g. I'm seeing if I like my Bendix 6080wb that's very euphonic vs rca which produces more bass slam.
I wish I could use my Baldwin 12ax7 but I guess it requires more voltage then the Crack provides? Currently running a Baldwin 12au7 and rca 6as7g. I'm seeing if I like my Bendix 6080wb that's very euphonic vs rca which produces more bass slam.
Don't spend $390 on a tube for the Crack, that's just craziness.
A 12AX7 has way too much gain to work well in the Crack and is overall a really bad choice. It also would require a redesign of the circuit to get the 6080 to bias properly.
A 12AX7 has way too much gain to work well in the Crack and is overall a really bad choice. It also would require a redesign of the circuit to get the 6080 to bias properly.
3
(312)
Guest
On the opposing end of the spending spectrum, I acquired this tube on the cheap. $10.
However, with inspection upon arrival, I'm wondering if I may have fallen victim to false advertising.
As, I am just beginning to dip my toe into the vacuum tube kiddie pool, I reach out to the community of which I now proudly roll with.
My question: A wolf in sheep's' clothing or genuine article?
My investigation has gone unfulfilled. Not that I'm put off if I was duped by a less than diligent purveyor of merchandise, my curiosity is piqued and knowledge is what I seek.
Most of the U.S. players have valves that look very similar, but it is the dimple getters that have me befuddled. Either way, it is a fine sounding tube, so no buyers remorse.
Any insight would be welcomed and appreciated.
Please and thank you.
P.S.- If I have misplaced this inquiry or erred in any way, my apologies. This is my first forum posting... ever... anywhere.
However, with inspection upon arrival, I'm wondering if I may have fallen victim to false advertising.
As, I am just beginning to dip my toe into the vacuum tube kiddie pool, I reach out to the community of which I now proudly roll with.
My question: A wolf in sheep's' clothing or genuine article?
My investigation has gone unfulfilled. Not that I'm put off if I was duped by a less than diligent purveyor of merchandise, my curiosity is piqued and knowledge is what I seek.
Most of the U.S. players have valves that look very similar, but it is the dimple getters that have me befuddled. Either way, it is a fine sounding tube, so no buyers remorse.
Any insight would be welcomed and appreciated.
Please and thank you.
P.S.- If I have misplaced this inquiry or erred in any way, my apologies. This is my first forum posting... ever... anywhere.
Attachments
It's a Sylvania 6080.312 said:
