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Recent content by rwind

  1. R

    Advantages/disadvantages of using LM350/LM317 linear regulator over RC filter to remove PSU ripples

    Got it, thanks.
  2. R

    Advantages/disadvantages of using LM350/LM317 linear regulator over RC filter to remove PSU ripples

    Thanks. Got it, ripple is not an issue with LM1875. So now the question is does a regulated power supply add to the quality of the sound, if so then the regulator can stay, right? if not I will get rid of the regulator. My plan id to make two 18V from 2 separate transformers-rectifiers-LM350...
  3. R

    Advantages/disadvantages of using LM350/LM317 linear regulator over RC filter to remove PSU ripples

    Thanks, I am looking for about 10W per channel, it is mostly going to be used for near field listening for computer. I have already made the power supply with regulators, other than loosing about 1V to the LM350, is there any major disadvantage to using regulators. I mean like quality of sound...
  4. R

    Advantages/disadvantages of using LM350/LM317 linear regulator over RC filter to remove PSU ripples

    Thanks. I have couple of these at hand, hope that will do ? TIP101: 8.0 A, 100 V NPN Darlington Bipolar Power Transistor High DC Current Gain - hFE = 2500 (typ) @ IC = 4.0 mAdc Collector-Emitter Sustaining Voltage--@ 30 mAdc VCEO(sus) = 80 Vdc (Min) Low Collector-Emitter Saturation Voltage...
  5. R

    Advantages/disadvantages of using LM350/LM317 linear regulator over RC filter to remove PSU ripples

    I have a few zeners with me, can you please explain why using the 13V zener is better than using resistors for the adjust terminal of the regulator. Thanks
  6. R

    Advantages/disadvantages of using LM350/LM317 linear regulator over RC filter to remove PSU ripples

    Thank guys for you inputs. Yes I am just an hobbyist messing around with electronics, no NASA engineer :) My PS|U is for an audio amp based on the LM1875 chip, I have a couple of 12.6V 3A transformer that I am trying to use have very little voltage to loose. So was wondering if the LM350 was...
  7. R

    Advantages/disadvantages of using LM350/LM317 linear regulator over RC filter to remove PSU ripples

    Can you please explain that further. What do you mean by bypass with a fixed resistor value? Thanks
  8. R

    Advantages/disadvantages of using LM350/LM317 linear regulator over RC filter to remove PSU ripples

    thanks.
  9. R

    Advantages/disadvantages of using LM350/LM317 linear regulator over RC filter to remove PSU ripples

    Hi, I am trying to decide which is better - using LM350 or RC filter to remove ripples. I need clean DC of 18V. Using LM350 I loose about 1.5V but I think it will be cleaner dc. With the RC filter I can use 1Ohm, 8300uF cap and reduce the cutoff to about 20Hz which is good enough. Can someone...
  10. R

    Can we use 2 Zeners to bring down 58V ac to something like center tapped 30V ac?

    Source is secondary from a transformer. varying load.
  11. R

    Can we use 2 Zeners to bring down 58V ac to something like center tapped 30V ac?

    Ok, the so called figure called messed after posting :) but I think you get the idea
  12. R

    Can we use 2 Zeners to bring down 58V ac to something like center tapped 30V ac?

    Something like ---------- ----------------- 29V 58V | ---- 1500uF ---- |----------------- To bridge ----- 1500uF ----- | ---------------------------- 29V
  13. R

    Can we use 2 Zeners to bring down 58V ac to something like center tapped 30V ac?

    Or else could I divide up the 58V using 2 capacitors of 1500uF and then use the junction of the 2 caps as center tap or ground and feed the other 2 end to the bridge?
  14. R

    Can we use 2 Zeners to bring down 58V ac to something like center tapped 30V ac?

    Thanks. About 7A
  15. R

    Can we use 2 Zeners to bring down 58V ac to something like center tapped 30V ac?

    I am thinking of using a clipper circuit and then rectify the clipped 30V using a diode bridge. Thanks
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