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  1. aurelZ

    Weiss FM demodulator

    Heh i see but that is not enough In most cases specific problem require: knowledge about thematic experience in thematic so nothing wrong!
  2. aurelZ

    Weiss FM demodulator

    mini chat ????? i don't speak spanish so i think that is usefull
  3. aurelZ

    10.7 MHz oscillator with transistor

    Ok and with 10.7mhz transfilter which force circuit to oscillate around 10.7 mhz?
  4. aurelZ

    Weiss FM demodulator

    And i already build one with npn transistor C383 -vhf type
  5. aurelZ

    Weiss FM demodulator

    Hi Martine Yes this one .. all what i have is this one i found on net.
  6. aurelZ

    10.7 MHz oscillator with transistor

    davenn and otthers.. I really don't know why my question is too complex. of course i don't want to transmit anything on 10.7MHz I just want to build this oscillator for testing I.F. 10,7Mhz amplifiers and demodulators. So i need one good -tested circuit for that purpose only
  7. aurelZ

    10.7 MHz oscillator with transistor

    For example look this simple circuit. it is almost typical fm oscillator -transmitter. i use fabricated choke of 3.3 uH with 68pF which should give 10.7mhz as resonant frequency but circuit simply not oscillate. or i need to add some audio signal to it to test is something on output? thanks
  8. aurelZ

    10.7 MHz oscillator with transistor

    Hi That is for total beginners and is ok. I have built many fm oscillators transmitters etc and all work with or without good layout ,main thing is transistor type and his working point. Unfortunatelly i have no luck with this one of 10.7Mhz why i need that ? I was asking for some working and...
  9. aurelZ

    10.7 MHz oscillator with transistor

    hello I found few circuits on net about 10.7Mhz oscillator and i build it with parts I have but it looks that no one of them not work ,in another words not oscillate. any help? anyone know for one tested with transfilter 10.7 mhz that work ? thanks
  10. aurelZ

    Weiss FM demodulator

    On the given link there is nothing about this type of demodulator or detector. It is strange that there is so small amount of information about this.
  11. aurelZ

    Weiss FM demodulator

    Hi Is there more information about Weiss FM demodulator? thanks!
  12. aurelZ

    How to put strong WiFi signal on 5KM Radius

    No matter which antenna or wifi card u use. the main point is optical visibility of transmitter and receiver antenna. We have connection over 5km air line with 150mW of power without problem with comercial antennas from both side. if you look for DIY solution then best thing is to use satellite...
  13. aurelZ

    Simple SW receiver on 3V?

    Thanks TCSC This design is really primitive but should work with not god selectivity .
  14. aurelZ

    Simple SW receiver on 3V?

    Ok leave aside batteries.... So is here anyone who can recommend me which type of SW receiver to build? Regens ...all types are not very much stable Maybe Direct conversion are better with and much stable. there are too many designs published?
  15. aurelZ

    Simple SW receiver on 3V?

    -You could just add boost converter like the TL496 to a 9v circuit. Hi so you think that i can use DC-DC upverter.. but that would just complicate things. Also i mean use fat 1,5V battery not tiny AA or AAA so receiver should work long time with low current consumption.
  16. aurelZ

    Simple SW receiver on 3V?

    Hi folks! I was looking into circuit of Shortwave receiver which work stable and solid on 3 V...mean 2x1.5V battery. I saw many circuits on net and on youtube but most of them use 9V battery ,which from my point have small time of duration. thanks in advance!
  17. aurelZ

    Replace variable capacitor with varicap

    Back to first circuit. It work as is given with 500pF air variable capacitor as MW TRF receiver. if you wish to turn it as normal regen look into modifications. This circuit can work on smaller voltages using 2 AA batt - 3V.
  18. aurelZ

    FM Pulse Counting Circuit Sounds Bad

    I build similar circuit based on ArmstrongFM2 pulse counting receiver which use 70kHz IF. Main trick with this receiver is to hold bias of IF transistors very low somewhere 0.6 - 0,68V.On this way transistors create saw signal which is needed for pulse counting demodulator.
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