But it is no cap multiplier 🙁 and I'm sure it will work as a 15V supply, the BC's change nothing about that!
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The parallel zeners do not improve anything (they would if the matching was 100% (0% difference) but they are not 🙁 and even then ... mmm (doubts expressed 🙂)) Anyway long term thermal stability is not a problem (over periods of minutes even seconds). I would guess that modern day 317/337's are even more stable then the zener(s)/diode.
When powering down, the capacitor is emptied through the BC's base-emitter diode, that is not advisable. To be a capacity multiplier you need some voltage drop between the BC's collector and base. On sudden large current demands, the output power is supplied through the BC's base-emitter diode (not good).
Ok, this was an old idea that I used 10 years ago.... you know better than me of course... I will use the standard 317 layout 🙂
How much current can the opamp draw from the psu ?
I am really considering using the kmult to filter but it needs enough current to work best.
I am really considering using the kmult to filter but it needs enough current to work best.
Yes, otherwise the kmult will struggle, but now it seems to add too much complexity.
I will try the "normal" 317 reg first.
I will try the "normal" 317 reg first.
OK, good. The new National opamps have very good PSU rejection anyway.
I use a little trick i learned from Bonsai.
Use 22 Ohm resistors in series with PSU plus and minus and decouple with 220uF each.
I then use only one 0.1uF foil from plus to minus for HF decouple ( Self ).
That way you improve PSU rejection in the treble where PSSR of the opamp gets worse.
I use a little trick i learned from Bonsai.
Use 22 Ohm resistors in series with PSU plus and minus and decouple with 220uF each.
I then use only one 0.1uF foil from plus to minus for HF decouple ( Self ).
That way you improve PSU rejection in the treble where PSSR of the opamp gets worse.
You did not got it wrong 🙂 say no more...
Monty Python - Nudge Nudge Wink Wink Say No More - YouTube
Here we have my first p2p draft.
Please comment on the component's layout and particularly on their pinout.
PS: Should the drivers be placed in contact with the heatsink ?
Please comment on the component's layout and particularly on their pinout.
PS: Should the drivers be placed in contact with the heatsink ?
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Would you care to verify pinouts of the opamp and output trannies... this is the copper side view btw.... I would really appreciate that and maybe I will save a lot of trouble 🙂
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