tomb
Member of the Trade: Beezar.com
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- Mar 1, 2006
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Very nice!
Another MAX lives!
Another MAX lives!
Originally Posted by Televator /img/forum/go_quote.gif good work ferds (no need for air/cooling holes?) I'm currently burning in my 12FK6 tubes (did a while with the 12AE6, but their gain was too high for my NAD C542/MS2i-combo) the AE seem to have a bit more bass than the FK, but I still think the FK's provide a good low-end in the Max. Just listened to some Boris & Sunn O))) and it was clean and punchy but at the right times almost rummmblin' deep Will the 12FM6's be somewhere in the middle? (they are gain-wise, I believe, but what about sound?) At the moment my NOS 12FK6's are still slightly unstable in their bias voltage (even after being on for 6 hours straight, each evening this past week) |
Originally Posted by amphead /img/forum/go_quote.gif Pabbi, update: So there is a bit of nice music eminating from the left channel, even though it is still supremely underbiased at 30mv on those DBs. That means I can concentrate on getting the right channel up to spec. - more info later. Edit: I need some information on setting up the 2 Maxes in a balanced configuration. Anybody? |
Originally Posted by pabbi1 /img/forum/go_quote.gif <snip>So, for the $64k question - do the buffer biases change with different tubes? If so, how does the buffer bias change when changing 12ea6a to 12fk6? |
Originally Posted by tomb /img/forum/go_quote.gif NO. The buffer bias is absolutely unaffected by the tube bias. We have had a couple of reports where the reverse has happened - biasing the buffers has had an effect on the tube bias. Neither should be the case, although I would believe it sooner in the case where the DB's may be able to suck current out of the CCS and perhaps drop the voltage slightly on the tubes. |
Originally Posted by odoe /img/forum/go_quote.gif I have to change out one of my tubes later today. At least I think it's a tube issue. If I tap on my desk or tap the amp, I get nasty static in the left channel. But, if I do it enough, like tap on my desk for 5-10 seconds, it slowly fades away not to return. The only thing I can think of is that I got a funky tube. This happened after I switched out a couple of orange drops for wimas in CA9, but touched nothing else. I thought maybe it was a grounding issue and wired the ALPS to ground, but it still happens. It's the fact that the static goes away after some tapping that makes me think it's a tube thing. |