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  1. SM2GXN

    My Computer Crashed Again

    I got his postal adress I'll drop him a mail tomorrow, I'll let you know  ;)
  2. SM2GXN

    difference b/w high frequency & transformer based inverters

    Sorry not my menaing to mix things up, I just wanted to explane the difference between horizontal and vertical frequency. No need to hang out my previous post just because it didn't stick exactley to his original question. My post was about this:
  3. SM2GXN

    sansui au-x701 trouble

    Hi bcrazy and welcome to this forum! How does it sound, distorted, low volume or hum? A oscilloscope would be a great help.
  4. SM2GXN

    TV tx

    Hi MNA! For couple of years ago I had dialup so I know what you are talking about :) There is lots of good books and web pages about transmitters, to understand those books you will have to read some fundamental electronics, there is really no shortcut you have to struggle through all of it :)...
  5. SM2GXN

    TV tx

    Forgot to comment on gogo2520 circuit :) the av-sender has much lower frequency about 1/5 which makes things a "little" easier, you can ofcourse build that one if you like but the easiest way is to use a RF-Modulator.
  6. SM2GXN

    TV tx

    Hi MNA! No there is nothing wrong with poptronix wireless link my friend  :) it's just that it is very high frequency 1250Mhz, firstly there is no PCB (printed circuit board) layout which is very critical at high frequencies, it's a matter of less than mm accuracy, well maybe not that much in...
  7. SM2GXN

    My Computer Crashed Again

    I'm concerned too, as a matter of fact I tried to search for his phone number since we live in the same country but I coudn't find any that matches his name. I don't know if Ante has more info about our friend Staigen.
  8. SM2GXN

    TV tx

    You are right MNA that circuit is only for video. The link gogo2520 posted show how a RF-Modulator is built, as you see there is input for video and audio. To boost the signal from a RF-Modulator which is usually in the range 60-80dBmV a antenna preamplifier can be used or build an small...
  9. SM2GXN

    TV tx

    As I told you if range is not an big issue  ;D Just connect a short piece of wire to the center pin of the output connector of the RF-modulator and a short piece of wire into the antenna connector of the Tv-set, if the distance between your tv and video player isn't to far you will se the video...
  10. SM2GXN

    TV tx

    Well. the poptronix circuit... just forget it. You can find an RF-modulator in almost every video player, it's a small box with 4-6 pins, there is inputs for both composite video and audio and a pin for supply voltage. If you look at the rear of a video you'll see it, it's where the antenna...
  11. SM2GXN

    TV tx

    Hi MNA! These schematics you uploaded are not the easiest to build I would say, to build them you need some "extra" skills in RF technique. Since the range is not an big issue why not use a RF-modulator from a scrap video then you have both audio and video transmitter or build your own...
  12. SM2GXN

    difference b/w high frequency & transformer based inverters

    High sukhbinder! I don't think a tv-set use the mains frequency and its voltage for anything else than the SMPS and the degaussing circuit, Tv-sets have mains rectifier and are primary switched. The horizontal sweep is not the same as the mains frequency but for the vertical it is, the refresh...
  13. SM2GXN

    Switching Converters

    Thank's indulis! Seems like you are the one to ask when it come to dc/dc converters  :D As I see it there is no need to bias Q3 as it will degrade the efficiency, am I right? What's the reason for choosing a logic level MOSFET? Sorry kerem for sort of hiijacking your thread but I hope it's ok...
  14. SM2GXN

    Wireless Intercom

    Yes you can build a small FM receiver out of an IC as you mentioned and a simple FM modulated transmitter with only a few components, both subjects has been discussed on this forum but I don't remember exact name of the thread,you can also visit the project section and RF circuits where you can...
  15. SM2GXN

    Wireless Intercom

    Hi crivoli! Have a look at this link there is some good info on different intercom systems: http://www.epanorama.net/links/intercom.html
  16. SM2GXN

    Wireless Intercom

    Hi crivoli! RF stands for radio requency, FM transmitter is a RF transmitter cause it transmitts RF. A transmitter use RF (usually called carrier) to carry information to the receiver , the carrier can be modulated in many different ways one of them is FM and also the most common used. Carrier...
  17. SM2GXN

    Switching Converters

    Thank's indulis for excellent explanation of the circuit, I would lika to add a few questions, are R17 just a load and for the second what is R16 doing?
  18. SM2GXN

    Variable AC Dummy Load

    I found the link, it will probably not add any important info on the subject but this is how some of these AC dummy loads are made. Someone on this forum must have made their own power resistors with kanthal, alkrothal or nikrithal wire. Well, here's the link, if you don't understand use...
  19. SM2GXN

    Variable AC Dummy Load

    ;D ;D ;D ;D ;D ;D ;D :-[ Me tooo!! Now I know that you can't simply link translated pages by babelfish, how pity! I got the link at work, I'll post it on monday in JP language, I've heard that you speak flawless Japaneese Ante  ;D
  20. SM2GXN

    Looking for Tektronix Manuals

    Thanks Zeppelin!  :) Don't know if you got this one? TEK-2430A-UG.pdf
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