Hello.I ordered this 3.3V-12V In / +-15V Out Dual Power Step up converter to power my preamps from USB or batteries. Can i apply the K-multiplier at the output of step up converter?What modifications are needed for low drop K-multiplier supposing max output current wont exceed 100ma per rail?
+15V/-15V Dual Power Supply Module 3W DC-DC Step up Boost Converter 3.3V-12V In | eBay
+15V/-15V Dual Power Supply Module 3W DC-DC Step up Boost Converter 3.3V-12V In | eBay
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Nothing, connect right to it.
But I'd want to put an inductor or some sorta filter in between, personally.
I was reading the page about K-multiplier The K Multiplier and there is a point that states:
''This regulator exhibits diodic output impedance. This means output impedance decreases with increased loading. The opposite is also true, which is why this circuit should NEVER be used with loads less then 25mA.''
My preamp draws about 18ma per rail.Should the circuit of K-multiplier be modified?
Can I use KSA 1381 instead of 2SA1930 and KSC 3503 instead of 2SC5171 ?
These KS have 150Mhz Ft and lower Cob around 3pF
maybe other alternatives ?
Capacitor leakage will usually be far too low to have any effect. Just add a load resistor at the output so that the total current will be over 25mA.
C29's ground is polluted by C28. C29 ground can be any point before C15 ground, the closer the better. But if C29 ground is after C15 ground, oscillation is much more likely.
The decoupling caps next to your lytics should be around 2.2uF or larger not to reasonate. 5mm caps up to 10uF are available.
maybe other alternatives ?
C29's ground is polluted by C28. C29 ground can be any point before C15 ground, the closer the better. But if C29 ground is after C15 ground, oscillation is much more likely.
The decoupling caps next to your lytics should be around 2.2uF or larger not to reasonate. 5mm caps up to 10uF are available.
2SC4793LB-TF3T - Power Transistor 230V 1A
2SA1837LB-TF3T - Power Transistor -230V -1A
Profusion has the 2SC4793/A1837 parts
2SA1837LB-TF3T - Power Transistor -230V -1A
Profusion has the 2SC4793/A1837 parts
The decoupling caps next to your lytics should be around 2.2uF or larger not to resonate. 5mm caps up to 10uF are available.
I was convinced the KM could support small films at the input and output without fear of oscillation.
The change you propose is to avoid oscillation or to not create other type of nastiness ?
It is just my suggestion to prevent the film caps from resonating with the lytics. It has nothing to do with oscillation. No regulator can prevent this. But if you have found some kind of decoupling that you prefer by experience, you don't necessarily need me to justify it.
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