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PhilBelanger

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  1. Originally posted by Lord Valve I'm a tube dealer, and I say balanced PI tubes are bull{censored}. If you *really* want your PI stage to be "balanced," the best way to do it is witha $3.00 pot, not a $30 tube that's been dipped in snake oil. For a typical Fender PI stage, for instance, you use a 100K linear pot. Remove the two plate load resistors (100K and 82K, for a blackface) and connect the pot's wiper to the B+ eyelet (where the two original resistors were connected together; there will be a wire coming off this eyelet that is connected to the HV supply) and then solder a 47K 1/2W resistor to the pot's two outside lugs. Connect the free ends of the resistors to the two eyelets which formerly had the plate load resistors in them. That's it. Now you can tweak your PI stage's "balance" to your heart's content. Set it where it sounds best. Once you have it where you like it, put the amp on a testload and scope the output. I betcha fifty bucks you set your PI stage balance pot so that the PI stage was fairly unbalanced. I have, in fact, put these pots in a number of amps (stuck through the back panel, where the geetah-picker could twiddle 'em) and I can't remember a single time where the amp came back with the PI stage in a balanced condition. Don't waste your money on "balanced" PI tubes. There are situations where a tube with two "matched" triodes is required, but very few of them are in audio circuitry, and fewer still are in musical instrument amplifiers. Lord Valve Expert And there you have it
  2. Originally posted by Loghead Some say yes; some say no. May depend on the amp. It may but I haven't seen it yet. In all the class A/B amps circuits I've seen, each side of phase inverter circuit are not matched by design (different anode resistor values) , so putting a matched tube in there won't do much the way I see it. At least not something you can hear IMHO.
  3. I liked the CL80 better, less fuzz, more in your face.
  4. Originally posted by Bob Savage My wallet justifies my equipment, my playing has nothing to do with it. Bob's got it!!!
  5. Quite a thread... I like Labrie. Yes sometimes, he doesn't the note live but he does most of the time. I really like Octavarium, Labrie's voice is great on it. The CD grew on me big time, the title track is a mix of Genesis and Pink Floyd and reminds me of what was good about 70's Prog Rock
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