I let it burn in for at least 100hours..not non stop..as i was afraid of blowing it up as it gets very hot..lolz..so it took a while..some say tube amps need at least 200 hours..i guess u have to try it out urself..
and a tip i learned from a tube man
- switch the amp on WITHOUT the headphones connected and the source off ( or not connected also ) and the volume set on zero
- let the amp/tubes warm up for at least 15 min
- connect/switch on the source
- connect the headphones
- play the music and slowly adjust the volume on ur 337/339 to ur liking
- turn down volume on 337/339 to zero
- switch off source
- disconnect headphone
- turn 337/339 off
ps..dont switch off and then turn on immediately..they dont like that..let it off for at least 15 sec.
ps2 if u wanna change tubes..let the amp cool down completely!!
oops..i sound like momma telling u to wash ur teeth in mornings and evenings..sorry guys..just wanted to share the infoi got from a a very good tube modder.
Ok great thanks for this. I was pretty much following this, except the first time I only allowed 5 minutes warm up - I think that was the problem.
5998s were really fantastic while they lasted. They worked yesterday, and now today one tube has stopped working. I switched tubes around and confirmed it was one of the tubes. I guess I'm back to stock tubes until I can get replacements :(. Is this weird for a tube to stop working after 1 day? I followed that procedure of turning on and off pretty much the same..
BTW Stock tubes + 5693 is big bass punch, but little extension. Overall, stock tubes are quite crap lol. V200 is much better than LF339 with stock tubes, even my Yulong D100MK2 is probably better.