Hi Everyone
Has anyone contemplated making a DIY pro-amp? There are some extraordinary specs available now, eg. 9kw continuous RMS in a 3U case (QSC Powerlight 9.0PFC).
Although I'm into valve-amps, an about-to-crawl baby suggests to me that solid-state might be better for the next five years or so. I have a 3U 19in rack, and 250 BD246 PNP bipolar power transistors - what should I build?
Something I'm tempted to try is a "beanstalk" circuit.This permits low voltage transistors to be used in a high voltage circuit, and was once used with TV circuitry, before the production of high voltage devices.
If this works (voltage sharing is not perfect) I'll post the circuit and PCB and make them copyright-free. I'm hoping to get about 1500 watts out of the thing, using more transistors than you'd expect (50-100) owing to the voltage sharing problem.
Nick Sheldon
Has anyone contemplated making a DIY pro-amp? There are some extraordinary specs available now, eg. 9kw continuous RMS in a 3U case (QSC Powerlight 9.0PFC).
Although I'm into valve-amps, an about-to-crawl baby suggests to me that solid-state might be better for the next five years or so. I have a 3U 19in rack, and 250 BD246 PNP bipolar power transistors - what should I build?
Something I'm tempted to try is a "beanstalk" circuit.This permits low voltage transistors to be used in a high voltage circuit, and was once used with TV circuitry, before the production of high voltage devices.
If this works (voltage sharing is not perfect) I'll post the circuit and PCB and make them copyright-free. I'm hoping to get about 1500 watts out of the thing, using more transistors than you'd expect (50-100) owing to the voltage sharing problem.
Nick Sheldon