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RE: I have been using the LM317 on low power amps

If you are interested, I have been using a cathode CCS on my PPP KT120 amps that supplies ~3oomA@-70V (needs a large heat sink) that is based on a Fairchild KA431 (low tempco variant of the TL431) and a power N chn MOSFET. Variation in current between dead cold and hot is +/- 0.25mA. So far has proved itself reliable with no oscillation.


"It is better to remain silent and thought a fool, then speak and remove all doubt." A. Lincoln


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