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  1. M

    I buy am/fm radio kit but something i dont understand

    I did not know,, how to do it , i try to make i did not know, what is his function ? i build all the circuit but i did not find vc and type of transistor and diode, the complete scheme i make it i build i have if you need.
  2. M

    I buy am/fm radio kit but something i dont understand

    Hi, So if you want select the 800µh and 470p formula only to experiments in ltspice, so is not any formula for exampe if you design for example one like this, how you select the value of inductor and capacitor , if you know the charachtersticks of transistor, is possible to show me one example...
  3. M

    I buy am/fm radio kit but something i dont understand

    Hi AudioiGuru, but i buy, i did not know that is regenerative tuner, , i ask in electronics shop, do you have some educative am/fm radio kit? and he say this is good, when i open i thought they explain how its works but WHAT TO SEE, only how to mount he explain, so first i want to finish this...
  4. M

    I buy am/fm radio kit but something i dont understand

    i buy last week, this is the manual :Dexellent thanks so much, so the two transistored are biased in the same way, my i ask why the pick 800uH inductor(how the calculated) also the capacitor(how they calculated 450pf) and 4.7K in the left side circuit 5 connect to right side circuit 5, but...
  5. M

    I buy am/fm radio kit but something i dont understand

    Hi, i buy this kit AM/FM RADIO KIT EL21 I thought they explain something but pfff nothing.... but the problem is that, they dont explain how it works circuit but only how to mount in board transistor resistor etc, something i dont understand for example the left half circuit side i understand...
  6. M

    NPN PNP coupling capacitor

    Thanks a lot man , now i understand.
  7. M

    NPN PNP coupling capacitor

    Hello, Duke, sorry for late answer, this is an form of bisasing on RF DESIGN
  8. M

    NPN PNP coupling capacitor

    Hi i know input is input, and pnp emitter is to ground, but this C2 make it complicate for me. so i ask with little words how does work?
  9. M

    NPN PNP coupling capacitor

    Hi, can somebody explain me how this circuits works? please, i dont understand input capacitor and C2 and C3. Thanks
  10. M

    Ferrite rod antenna explanation

    Grretngs AudioGuru, i see you post a lot, you are cool man ;-)
  11. M

    Ferrite rod antenna explanation

    Oh my dear frind, i have all explanation, i just want to know is transformer of not, for the rest i print it, how it works... only for ferrid rod loopstick did not say nothing, my question was is that transformer? thank a lot,.....have a good day
  12. M

    Ferrite rod antenna explanation

    This one on the left is transformer?, 3 and 4 main LC TANK of primary and 5 and 6 are secondary? right?
  13. M

    Ferrite rod antenna explanation

    so for example ferrit rod loopstic als is a transformer(that i want to know is transformer) thanks a lot man
  14. M

    Ferrite rod antenna explanation

    Hi AudioGuru, so the ferrit rod is like transfoirmer, and secondary of copling is connected to amplifier right
  15. M

    Ferrite rod antenna explanation

    Hi, Duke one more time, ferrit rod does have a primary and secondary coil, so seconday coil is coupling inductor(because i am reading rf componnets book) and the book tell about primary winding and secondary winding(connected to transistor), and he tell how to calculate turns and so ...
  16. M

    Ferrite rod antenna explanation

    Thanks Duke
  17. M

    Ferrite rod antenna explanation

    thank AudioGuru
  18. M

    Ferrite rod antenna explanation

    HI, i read rf component like i understand rf transformler, is for example if 400ohm input primary at the secondazy to the base for example 50 ohm theyy tell you how to calculate, how many winding primary and seconday, but is this the formala
  19. M

    Ferrite rod antenna explanation

    thanks Duke can you help me just for coupling inductor, one example please
  20. M

    Ferrite rod antenna explanation

    AuduGuru i am reading one book he say is rf transformer, is true?
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