Recent content by halen

  1. H

    0-30 Vdc Stabilized Power Supply

    EDIT: I find UA741 OP Amp, it is 44V, its not decompensated.... Ok I try it with some 44V OPAmp.  I can buy OPA445 now, but for $14.11 per unit :-D Its wery expensive, so its better to buy professional lab power supply.
  2. H

    0-30 Vdc Stabilized Power Supply

    I can buy: LF356N, OP37, OP07, NE5534. It is possible to use one ot those? EDIT: I can buy OPA604 - 48V supply voltage
  3. H

    0-30 Vdc Stabilized Power Supply

    Czech Republic - Europe, Alll distributors of electronics parts doesnt have OPA445, and if I want to buy them, i  must buy 100+ pieces... :-( Iam not crazy.
  4. H

    0-30 Vdc Stabilized Power Supply

    Thank you for super-quick answer! So what now? I find next Ha7-2645-5 OP, but best is OPA445 isnt it?
  5. H

    0-30 Vdc Stabilized Power Supply

    Ok thank you. I have one more question  :) It is impossible to buy OPA445 in my country and TI dont send free samples for me. I can buy LM143 (SG143) OP amp.  Will those op amps work or I must change some parts?   
  6. H

    0-30 Vdc Stabilized Power Supply

    I replaced TLE2141CP with OPA445 (I try many others OP amp but 100% work only OPA445) and replace 24VAC TR with 30VAC to get max voltage 30V and now, in simulation PSU work. Both V and I regulation work perfect.  But I have next problem. If I measure output with osciloscope I get 20kHz...
  7. H

    0-30 Vdc Stabilized Power Supply

    Hello Iam new there. I have problem with this PSU. I designed it in the Multisim simulation, but doesn't work. Used modified partlist, 24VAC TR, BZX83C5V6, I have troubles with - 5.6V D7. I using TLE2141CP OP amps in simulation and if I connect U2 to the -5.6V, then voltage drop to 800mV. If I...
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