The seller's description states "TV-7 tested tube1-68.68,tube2-68.68".Hi guys !
Is this the original 5998?
https://www.ebay.com/itm/1160515967...62HPH3&hash=item1b0536d5b3:g:7BkAAOSweG9ltRWs
What does it mean ? This is good ?
The seller's description states "TV-7 tested tube1-68.68,tube2-68.68".Hi guys !
Is this the original 5998?
https://www.ebay.com/itm/1160515967...62HPH3&hash=item1b0536d5b3:g:7BkAAOSweG9ltRWs
Good or badThe seller's description states "TV-7 tested tube1-68.68,tube2-68.68".
What does it mean ? This is good ?
What other parameters are important? I'll ask the seller.Good or bad
Good, the matching numbers indicate you will unlikely get any channel imbalance.
Bad, they match each other to the hundredths. This is unbelievable
Hallmark of a bad (or dying) tube, unfortunately.Just got a pair of 6as7ga GE tubes that I'm running through my amp and have been letting them burn-in for about an hour now. I started to listen to some music and everything was great for about 30 minutes. Then all of a sudden I got a pop noise in my right cup and swear I saw a little flash come from the tube out of the corner of my eye. It wasn't a loud pop, but it startled me a little. I turned the volume all the way down and unplugged my headphones, but nothing else happened.
I've been listening to music for the past 10 minutes and nothing abnormal has happened and both channels still sound the same. Is this fairly normal for new tubes or should I be concerned?
Ahh that's unfortunate. Thankfully they weren't too expensive and I might be able to get a refund. Swapped in my other set of tubes and everything works fine, so that's a relief.Hallmark of a bad (or dying) tube, unfortunately.
Can you provide a photo of the pins and of the adapter?I bought an A2293 adapter from Xuling a while ago and was going to try a pair of GEC CV4079 today, but inserting the tubes in the adapter is impossible. Anyone had this issue? I'm afraid if I use more force I'll break the pins.
Can you provide a photo of the pins and of the adapter?
Oh well it didn't take more than 20 mins and the tube died. Made a loud pop in the left channel and the tube started flickering. Thankfully it didn't take my headphones with it.
Edit: The glass shattered due to excessive force needed to insert them and taking them out...
The tubes aren't expensive, but the sound was really awesome for the short period I could listen so I'm definitely willing to try again with a better adapter.
Sorry for your loss.
FWIW I've been using those adapters for years without issues, it is possible the issue was with the tube. Also, I always use a pin straightener with 9 pin tubes before putting them into anything (including the box).
Agree the sound is awesome, esp. for the money.
I have 4 of those adapters from Xuling and although a bit stiff I never had to use excessive force to get them into the socket. Maybe the socket is defective? How about the other tube, was that also a pain to insert? I have used these extensively in the past and they are known as baby 5998/6AS7Gs for their sound. I hope you try again.