I just checked the bias again tonight (around 10:30pm), and it was actually a little under the amount I set it at yesterday afternoon. The acceptable reading is supposed to be anywhere between 275 and 300. I set the bias yesterday at around 285 on each tube. Tonight, when I measured them, they all read either 272 or 275.... I just left them as is... i guess they will vary slightly. VTL said that if the reading falls within 10% of the acceptable range, then that is OK...
Burn-in and Biasing
I just got a new VTL integrated (IT85) tube amp yesterday. Two questions:
BURNIN:
--Is it OK to leave it on, on a low level, overnight and during the day, running constantly? (Hope so! that's what I'm currently doing, but I can turn it off when I get home if I have to)
BIASING:
--The manual says that only a recommended VTL tech should bias the machine. It seems kind of complicated. The person who does the biasing needs to use some kind of digital multimeter equipped with autoranging feature. I guess I wouldn't mind trying it myself, but I have never done this.
The manual recommends that the amp is biased when it first is setup. What are people's opinion on this? Is biasing something I could do myself, with that meter?
TIA....
BURNIN:
--Is it OK to leave it on, on a low level, overnight and during the day, running constantly? (Hope so! that's what I'm currently doing, but I can turn it off when I get home if I have to)
BIASING:
--The manual says that only a recommended VTL tech should bias the machine. It seems kind of complicated. The person who does the biasing needs to use some kind of digital multimeter equipped with autoranging feature. I guess I wouldn't mind trying it myself, but I have never done this.
The manual recommends that the amp is biased when it first is setup. What are people's opinion on this? Is biasing something I could do myself, with that meter?
TIA....
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- 16 posts total
- 16 posts total