Home |
Search |
Today's Posts |
|
#1
Posted to rec.audio.tubes
|
|||
|
|||
? about tube burn in time
Hello i'am new too tube gear and just bought my first tube preamp.
How long does it take to burn in new tubes? Thanks for the info |
#2
Posted to rec.audio.tubes
|
|||
|
|||
? about tube burn in time
Mwin35 asked:
Hello i'am new too tube gear and just bought my first tube preamp. How long does it take to burn in new tubes? Thanks for the info What does "burn in" mean, do ppl think? To me, "burn in" takes a component or an assembly to the edge of, or beyond, its normal operating limits for a relatively short time. A "soak" is carried out within normal conditions for a relatively long time. Anyway, it will cut a long story short to assume that you are concerned about sound quality rather than reliability. Let's assume your preamp is so optimally designed that it only sounds its best when the valves' characteristics are exactly as specified. Also assume that the valves are so perfectly manufactured that they all match those characteristics for most of their lives, and that they have already been burned in by your supplier, but not soaked. Broadly speaking, a valve's characteristics will change most rapidly very early in its life. It will then stabilise to a gentle pace of degradation. Consequently, your ideal preamp with ideal valves will improve for a shortish while, sound its best for quite a long time, and then slowly decline. In normal domestic use, perhaps a week or two and a couple of years. Depends on the valves and their operating points. In reality you will be lucky to hear any difference, for better or worse. Why do you want to know? You can't do anything about it anyway. If you can't hear it getting better, assume it won't. If you can hear it getting better, it could just as well be your perception is changing, and in either case it will soon settle. Unless you have control over the circuit, or you want to get into swapping, or "tube rolling" as they say (why?), don't fret. cheers, Ian |
#3
Posted to rec.audio.tubes
|
|||
|
|||
? about tube burn in time
Hi,
How long does it take to burn in new tubes? It depends. Usually, new small signal tubes have no burn in time to speak of. For larger ones, it can take its time. The worst ones I ever encountered were some Zaerix 807 and Siemens QE06/50, both actually produced in the former USSR, but from different plants. They needed 48 hours of simmering at about 80% Pd until plate current stopped to wander around. No chance to match them before. (At least not what I understand with the term "matching"). After that, they stayed rock stable during about 300 hrs of operation by now. Tom -- When in doubt, use brute force. - Ken Thompson |
#4
Posted to rec.audio.tubes
|
|||
|
|||
? about tube burn in time
"Mwin35 Hello i'am new too tube gear and just bought my first tube preamp. How long does it take to burn in new tubes? ** It is YOUR gullible, audiophool brain does the " burning in " - not the damn tubes. Go back to the whatever audiofreak's lunatic asylum you escaped from - TROLL. ........ Phil |
Reply |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
rec.audio.car FREQUENTLY ASKED QUESTIONS (caution, this is HUGE) | Car Audio | |||
Whats wrong with LEDs for bias? | Vacuum Tubes | |||
World Tube Audio U P D A T E D 17 new Tube Amplifier companies | Marketplace | |||
KISS 121 by Andre Jute | Vacuum Tubes | |||
What is a Distressor ? | Pro Audio |