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The NPN transistor I used was a 2N5885, the 2n6124 is the PNP driver. To do 150W ps, you probably woud have to parallel four 2N5885.
Building a linear over 100W is not trivial. It takes serious heatsink knowledge and also SOA considerations on the power devices. I tend to agree it makess...
That's why it's generic. Some of the resistors determine what your output voltage range is. Caps are in uF. The 15V line current draw is probably in the 20 mA ballpark but that's a guess. INA is from the positive unregulated supply. Maximum feasible curent is like 4 - 5A ballpark depends...
You need a relay. No it's not worht the effort, I would just bulid a switcher that regulates about 2V higher than VOUT and use a 2V linear supply to drop it down. You get low noise and fast transient response of a linear but high efficiency near switcher level.
No offense but the LM723 is a...
I remember a specific failure mode on the "floating" 317 circuits with HV involved. There's usually some capacitors some where and at turn on they can force too much voltage across the LM317. Remember having this argument with the marketing idiots at NSC. I wanted to take the "HV floating"...
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