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  1. aurelZ

    10.7 MHz oscillator with transistor

    Thanks Mike ..i am glad that work for you and for me to,it is simple but do the job.
  2. aurelZ

    LED slim tube LED driver replacement

    yes i agree that is potentially lethal,but fabricated circuits are not much better,they are all transformerless ..only maybe real brands as philips..etc are more safe and better
  3. aurelZ

    LED slim tube LED driver replacement

    what you say now? can i replace it with transrmerlless driver like this
  4. aurelZ

    LED slim tube LED driver replacement

    all leds work(light) ..checked with mulltimeter there are 2 strings -strips each 72 diodes i don' t want to throw it because work...here is how look 2 leds are connected with DC power with resistor in serie [mod edit: cleaned up double attachment]
  5. aurelZ

    LED slim tube LED driver replacement

    hello I have blow up slim LED tube with 2 strips ,each strip have 72 LED chip diode what would be easiest LED driver replacement i can build myself?
  6. aurelZ

    DVB T2 h.264 to h.265

    thanks of course it is a question,,,it looks that is not only a problem in software then in hardware to so only solution is throw it into garbage...
  7. aurelZ

    DVB T2 h.264 to h.265

    If I understand it right it is just software codec...or not?
  8. aurelZ

    DVB T2 h.264 to h.265

    hello i have question about dvbt2 receivers i have one with h.264 and can i receive h.265 becazse u receive sound but without picture
  9. aurelZ

    SW radio using OP amplifier

    The PAM8403 is a 3W, class-D audio amplifier. ... so as such cannot be used as receiver,here is not how much cost than how to build....
  10. aurelZ

    SW radio using OP amplifier

    ```The LM386 is a power amplifier, not a preamplifier``` well who know that ??? he he better noisy toy powerish amplifier which is not used in almost any comercial product
  11. aurelZ

    SW radio using OP amplifier

    Ha ha "lousy" if is uA741 lousy what is then with LM386 ..it is probably SUPER lousy with annoying hiss. uA741 is probably one of the best every made chips , just to let you know some special version are used in military applications from -50 to 150 C degrees...
  12. aurelZ

    SW radio using OP amplifier

    I see that point of course but for working point transistor base dont need voltage splitter with two resistors as far as i know ...i will see
  13. aurelZ

    SW radio using OP amplifier

    Is that mean that i don't need any voltage on non-inverting input ...where is just a base of transistor ?
  14. aurelZ

    SW radio using OP amplifier

    Yes i see it is non-inverting version where is nothing connected from + rail right? just a input capacitor ?
  15. aurelZ

    SW radio using OP amplifier

    Yes Bertus you have a right ,i will add 50k trim-pot to try and yes it should be regenerative detektor. I have somwhere ..in a one old electronic book similar circuit so i will try ...thanks for a tip !
  16. aurelZ

    SW radio using OP amplifier

  17. aurelZ

    SW radio using OP amplifier

    I will try this
  18. aurelZ

    SW radio using OP amplifier

    It is stated that gain should be around 40 which gives R4- 8k2 and R3 -220 ohm
  19. aurelZ

    SW radio using OP amplifier

  20. aurelZ

    SW radio using OP amplifier

    Yes that is strange to me either, in that fm transmitter uA741 was used as microphone preamplifier for oscillator part of fm transmitter and if i rememeber circuit work ok. When i looking into iner circuit of 741 chip we can see that output transitors are complementary with two resistors at...
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