I've already discussed some of this with NOCD off-list, and I'd appreciate any other opinions, I don't get this.
Basically, my 50w 2204 from 1978, RICH-mastered, generates about 350v on the plates, and I've cranked up the plate current to max 47mA. Even this only gets about 15.5w at idle.
I first spoke to Dave about this yesterday, when the bias measurements were 367v/ 38mA, later they fell to 358v/ 33mA, today they were 345v/31mA. I cranked up the current to max 47mA, and now the speakers "chirp" like a bird when I turn up the volume. Stop laughing....
Thing is, the amp still works, I can play through it (though I've kept it low, it's late here).
Any ideas what's going on, anybody? Is it going to blow or anything?
Yours nervously....
Basically, my 50w 2204 from 1978, RICH-mastered, generates about 350v on the plates, and I've cranked up the plate current to max 47mA. Even this only gets about 15.5w at idle.
I first spoke to Dave about this yesterday, when the bias measurements were 367v/ 38mA, later they fell to 358v/ 33mA, today they were 345v/31mA. I cranked up the current to max 47mA, and now the speakers "chirp" like a bird when I turn up the volume. Stop laughing....
Thing is, the amp still works, I can play through it (though I've kept it low, it's late here).
Any ideas what's going on, anybody? Is it going to blow or anything?
Yours nervously....