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  1. Miguel Lopez

    Help with aerial for channel 38

    Thank you very much for your answers. I will try that :)
  2. Miguel Lopez

    Help with aerial for channel 38

    In order to increase the gain, I have thought to use two turns instead of one. Would this increase gain? Would this increase impedance too? Is it worth a try?
  3. Miguel Lopez

    will this really give me a triangular wave?

    It is a real triangular wave and of course it has some distortion. Nothing is 100% pure in the real world.
  4. Miguel Lopez

    Take your guess!

    I have tried that using a lemon, and a couple of diferent metal wires (iron and copper, in my case). It works for a very short period of time (few seconds), but to power a white LED you would need about 3V, so a single cell won't work. I think that require at least 2 cells in series. A phone...
  5. Miguel Lopez

    Datasheet for FG209M2 Fluorescent Display

    Here some photos that I took to the schematic. Hope you find them useful.
  6. Miguel Lopez

    Datasheet for FG209M2 Fluorescent Display

    As it seems very hard to get the datasheet, I thought that I could find the info in the schematic of the device which used this display......and I founded. In our library we have the schematic of the Radiometer PHM83 pHmeter. And here is the info that I found: Pins 1, 18 Heater (6,3V AC)...
  7. Miguel Lopez

    Datasheet for FG209M2 Fluorescent Display

    Hi Martin I found that one too. I have the UDN6118A drivers for the display and I also have the datasheet for the drivers, but I have not been able to find the datasheet for the display.
  8. Miguel Lopez

    Datasheet for FG209M2 Fluorescent Display

    Hi everybody I would like to find the datasheet for al old FG209M2 fluorecent display. I retrieved from al old pHmeter, and it looks OK. The getter is still black, so it seems that it has not lost the vacuum. I searched for a while on Google, but I found nothing about the datasheet. I couldn't...
  9. Miguel Lopez

    Analogue electronics: Iron in the Soul

    AFAIK, common people are not able to notice a 2% distortion on audio, and I don't think on a well designed amplifier having more than 2% distortion, so, most of us will not notice anything. Maybe John Williams or Enio Morricone would do........
  10. Miguel Lopez

    rice cooker always at "cook mode"

    The contacts on the cook switch (operated by the lever) should be welded, due to rust. Remove the bottom cover and take a look there. If I'm right, you should separate the contacts and clean them using sand paper of a little file. Maybe that piece lost its elasticity due to heat and then it...
  11. Miguel Lopez

    Audio/Video to RF. Help!!

    The reasons for scarcity in Cuban economy (and everyday Cuban's life) are many of them, but I'm not interested to discuss such topic on this thread.
  12. Miguel Lopez

    Audio/Video to RF. Help!!

    Thank you very much to all of you for your answers and comments. Bless you all. I tried two circuits this weekend, using Soviet 2T355 and 1T311 (this one is a Germanium) transistors but with no results. I didn't had to farkle as there was nobody nearby. I keep trying. @hevans1944 Thank you...
  13. Miguel Lopez

    Audio/Video to RF. Help!!

    Nor "terrorism sponsors"!!!!. :D You will be welcomed. It would but I have two problems with that circuit. 1-) I would need more data about transformer T1, as I don't know how ro build it. 2-) It is for PAL format. Soviet TVs in Cuba uses NTSC. Can the circuit be adapted for NTSC?
  14. Miguel Lopez

    Audio/Video to RF. Help!!

    Thanks to Dave and Hevans1944. That would be really nice, but there is nothing like that here. I work with scavenged components mostly, and usually from the Soviet era, so the variant with discerte component will be more suitable for me. I remember back in the 90s, some Cubans had video games...
  15. Miguel Lopez

    Audio/Video to RF. Help!!

    My intention is to build it myself (where is the fun otherwise?). Anyway, I will send you a PM soon. Thanks
  16. Miguel Lopez

    Audio/Video to RF. Help!!

    NTSC Sorry, I can't. The word "purchase" should not be mentioned in your answers please. There is nothing like that here. Muchas gracias por sus amables palabras. El osciloscopio sigue funcionando muy bien. Saludos. That is the solution that some Cuban are using but sorry, I don't have an old...
  17. Miguel Lopez

    Audio/Video to RF. Help!!

    Hello I need to convert an Audio and Video signal to RF. Is there a way to build a simple circuit to do this. I don't mind if for channel 3 or 4. It is to watch the Cuban Digital TV, using a decoder (Audio/Video output) in an old Soviet TV. Thanks in advance
  18. Miguel Lopez

    Rest in Peace, Kris

    I'm really shocked about this. Kris was always a nice forum member who was always willing to help. My condolences to his family. Rest in peace friend May the Gods of Electronics be with you.
  19. Miguel Lopez

    Rectifier Help Needed

    Not sure if the windings are equal (all three). If that is the case, use a polyphase rectifier. http://en.wikipedia.org/wiki/Diode_bridge
  20. Miguel Lopez

    Help with aerial for channel 38

    Yeah, yeah!!! Hurricanes is something that must be taken into account ALWAYS in Cuba.:D
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