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  1. 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?
  2. 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
  3. aurelZ

    SW radio using OP amplifier

    Because of unknown reason similar post is closed i open new one . Why i simply have lot of this chips and would be odd to throw them into garbage, In the past i have build FM transmitter with 4.5 V using two RF trasistors and uA741 on this 4.5V battery and work well... so now i am wondering how...
  4. aurelZ

    Hand on the loading coil

    -Your hand on the loading coil seems to be creating some sort of tuning, likely capacitive? hello I have similar problems with my receivers, is that mean if tune well with hand on tuning coil that something is wrong with signal grounding ? or is that mean that gain is to small? ..anyone can...
  5. aurelZ

    UNusual FM ratio detector

    Hi Most of us know what is ratio detector but i recently found this one on a japanise site where guy explained that work, so i quickly made a replica then is found that not work ,,well maybe he use extra powerful RF out ... any comment on that ???? https://qhodo.at.webry.info/201001/article_7.html
  6. aurelZ

    FM oscillator/mixer

    Hi What should be the best or simpliest version of one RF transistor as fm oscillator/mixer in fm receiver circuits?
  7. aurelZ

    Where is the catch?

    I would like to ask why I as a new member cannot post or reply to some topics forum stated: (You have insufficient privileges to reply here.) Why is that ? Or is that because i am new member? thanks
  8. 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
  9. aurelZ

    Weiss FM demodulator

    Hi Is there more information about Weiss FM demodulator? thanks!
  10. 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!
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