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  1. walid1

    help in using google

    Hi guru LM555 is very famous and one can find anything about it rabidly Try MC3359 circuit  and choose image, u'll get zero results
  2. walid1

    help in using google

    hi all sometimes i want information about IC It is easy for me to write its number and get the datasheets I want circuits that uses that IC, what to do. can anyone help thanks
  3. walid1

    Help me to understand the MC3359P IC

    Hi guru Finally and after some effort I can borrow a high rolsolution cam and take some photos, please look below the first figure is for awhole SENAO SN-736 board for you to look the second is a close view to 3359 Ic and related components. I need your help and any help frome anyone here to...
  4. walid1

    cordless phone SENAO SN-736

    Hi I need the circuit diagram of SENAO SN-736 thank u very much
  5. walid1

    Help me to understand the MC3359P IC

    For these reasons I suggest to find the Tx in the same board. I know it send to another receiver but we can modify its freq to match our receiver. At this moment I lost my scanner (acer) software, I'll find one then I can send a photo of the board to get a help from u to find that Tx guru I...
  6. walid1

    Help me to understand the MC3359P IC

    Hi guru, thank u very much. Please look at the figures below: (1) If I introduce this limiter between the mic stage and the remaining stages of your FM Tx, then it will function as a AGC, that is it control the amplitude of my voice so that the o/p freq BW about 6KHz or so? (2) My circuit board...
  7. walid1

    Help me to understand the MC3359P IC

    hi guru Now we need a limiter now i'll search about it can you point me to make this mission easy thanks
  8. walid1

    Help me to understand the MC3359P IC

    Hi guru Hi Kevin Guru, you are the king here, at least for me. I’m already learned about radios. I know u said that to escape from my 10,000 questions that will coming soon (smiling). Look guru, I read about radios more than u expects. Theories do not suffice my requirements to be an expert...
  9. walid1

    Help me to understand the MC3359P IC

    thank u Kevin Weddle for fast reply Now if audioguru's FM Tx is sending with carrier freq = 100MHz what stage must be connected to that i/p to receive signals thank u
  10. walid1

    Help me to understand the MC3359P IC

    Hi Below I attached the datasheets of the MC3359P IC. I have a ruined cordless phone (SENAO SN736) From this phone I’ll get that IC and the related components, and with your help and some modifications, I want to build a FM receiver. Lets go: (1) What the meaning of RSSI written at the...
  11. walid1

    filtering

    Hi guru what are SAW filters?
  12. walid1

    BJT biasing

    Practical Benefits of the Negative Feedback Most practical amplifier circuits use negative feedback for the following practical benefits: Stabilization of voltage gain Decreasing output impedance Increasing input impedance Decreasing distortion Increasing bandwidth How NFB decreasing...
  13. walid1

    a very simple FM Tx

    Hi guru two weeks ago, i discussed and write an article about a very simple FM transmitter, the one whose circuit is appear at the top of this topic- in an arab community. my discussion was depending
  14. walid1

    BJT biasing

    Hi To Cabwood, thank u very much for this detailed and very clear explination. To audioguru I understood from Cabwood the mechanisim of -ve FB when there is no CE Can u please explain how CE remove -ve FB ? thank u
  15. walid1

    radio

    Hi monoman The following link is a practical book full with transmitters and receiver circuits if u read it carefully, you will find all what u need to know about FM also AM and antennas I hope it help u. http://www.mikroe.com/en/books/rrbook/rrbook.htm while u  r reading, you can ask about...
  16. walid1

    a very simple FM Tx

    Hi guru I can't understand or accept that the LC impedance is infinity at its resonant frequency. Here is your formula: At resonance XL = Xc in magnitude and if they cancle each other because of phase.................... Yes Yes its impedance is infinity at its resonant frequency. But...
  17. walid1

    a very simple FM Tx

    hi guru If they cancel then the Z is zero not infinity I know it is not zero the ohmic resistance of the coil wire and cap materials .. etec please look, the man who do this: http://hem.passagen.se/communication/antenimp.html say: the matching between Zout and the 50 ohm antenna using Pi...
  18. walid1

    preamp op amp circuit question

    hi guru IF i apply audio sif to the input cap of 10uV, then I'll fet it from the o/p (before the volume) as 100*10u = 1mV or 50* 10u = 0.5mV????????????
  19. walid1

    a very simple FM Tx

    Hi guru yes I agree, it It has the wrong formula and they calc it as 220 and i calc it the first time as 110 and mistake when tell you it 220 ( I was hurry) yes, I know, but still must calc it to know the o/p impedance to correctly fit the matching network, then may modify it lettle to...
  20. walid1

    preamp op amp circuit question

    Hi guru Av = R2/R1 = 220/2.2 = 100 and not 50 correct me
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