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  1. M

    Hi, have anyebody had trouble building the ELENCO 108 AM/FM RADIO KIT

    Here is schematic, if somebody can help me, now i change something and only low noise no signal
  2. M

    Hi, have anyebody had trouble building the ELENCO 108 AM/FM RADIO KIT

    Yes in correct place i soldeer it, but what for problem is? what do you think?
  3. M

    Hi, have anyebody had trouble building the ELENCO 108 AM/FM RADIO KIT

    I test it, but what do you thing, it can be maybe from lm386, because i soldeer it direct without the holder(socket)? it possible that i destroyd lm386? AND FOR THAT IS NOT WORKING
  4. M

    Hi, have anyebody had trouble building the ELENCO 108 AM/FM RADIO KIT

    Hello, i build the radio like they say in the book, and i did everything with VOM(testing with only multimeter), everything was like in book , but when i finish, i switch to am or fm, i just hear high noise :( I Measure, Test Point, without connection a speaker(because i thought the speaker was...
  5. M

    Hi, can somebody help me with feedback circuit

    Ohhh Realy i am sorry, that i did not open the forum, realy i am sorry, i thougt is finish i understand, and i thought i understand, for that i did not open the forum, Is a resonance at specified frequency, the LCR is series impedance, at lowest value, this means the negative feedback is...
  6. M

    Hi, can somebody help me with feedback circuit

    I think feedback is thrugh tuned circuit and resitor I think feedback is thrught tuned circuit and R1 of rc circuits,...……..the emitter resistor is to bias and also gain, and l2 the same but he deopends from frequency low or high imedance and also gain…….
  7. M

    Hi, can somebody help me with feedback circuit

    HI thanks for help i understand now, so have nice wekend to everybody;)
  8. M

    Hi, can somebody help me with feedback circuit

    Yes of course that not work, let take example that RC is resistor is connected for example to 12V power supply, a 1V peak input, now i dont understand what they do lc, you can use one resistor feedback...……..
  9. M

    Hi, can somebody help me with feedback circuit

    GoodMorning Duke, so you mean only at that frequency will work Q1, otherwise there is no feedback?, because i have one software feedback analysis, is very easy to design the circuits, after i build the circuit in multisim and i make experiment andi i dont see anything change in voltage of...
  10. M

    Hi, can somebody help me with feedback circuit

    Hi, Kelly, so that is tuned circuit, C1 and Inductor,, they resonace at 11.25Mhz, but i dont understand, what happen when is lower frequency or higher frequency than 11.25Mhz
  11. M

    Hi, can somebody help me with feedback circuit

    Hello to everbody, can somebody expain how work and what they form feedback capacitor inductor resistor, if it was only resistor feedback i understand, but this make me dificult to understand with capacator and inductor.... and also L2...thnx.
  12. M

    Hello, i need a little help with inductor used in jfet

    Ah for that i ask , do i know of not., THANK YOU DUKE:), have a nice day….
  13. M

    Hello, i need a little help with inductor used in jfet

    What is wrong, i dont understand, i dont know where is output...…….
  14. M

    Hello, i need a little help with inductor used in jfet

    Thats is right LC charge and discharge i know, but i never see something like this circuit, but like Duke say, after is feedback Q1 thrugh Q2, because i never use fet transistor, for that its new for me. and Q3 get signal from Q2 right? of not…..and Q3 is output?:(
  15. M

    Hello, i need a little help with inductor used in jfet

    Duke i will like just to know how charge and discharge L1 and C just that i want to know thnx
  16. M

    Hello, i need a little help with inductor used in jfet

    I take from that book, but he dont explain, only that gate drain is configuret Q1 and Q2 Q3 source follower, Q2 is coupled via 22p and back to stage Q1, 18Ω resistor is to stop parastic oscillacition, more not, i still dont understand, for that i ask help, just little bit how it works.
  17. M

    Hello, i need a little help with inductor used in jfet

    O sory, can you just tell me where discharege O Duke i have some question, i search on the internet, to find how the circuits works, but i did not find something like this………..is possible to describe how work the circuit please
  18. M

    Hello, i need a little help with inductor used in jfet

    Thank you very much…..Have a nice wekend. ;)
  19. M

    Hello, i need a little help with inductor used in jfet

    Hello can somebody help, what do the inductor L1 is to stop high frequency of wat, this is circuits
  20. M

    Hello, can somebody help me with an240P

    Thanks a lot man, have a nice wekend:D;)
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