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  1. mettula

    Transistor BF 494

    THANKS staigen for your offer, yeah indeed  thanks a lot but i found a retired ex-army official and had a couple of BF494 which he sold me. Thanks again m8. and yes gozo - malta are an-eu country. YOU GUYS ROCK ;D ;D :) :)
  2. mettula

    Transistor BF 494

    Staigen i live in Gozo a sister island of Malta - here few are in the rf field and many times for a school project or hobby we have to import components from abroad which makes projects expensive. some shops do provide help but sometimes this forum helps better  ;D ;D ;D
  3. mettula

    Transistor BF 494

    But are SK B1382 and 2SK1382 equvalents of BF494? or as i said can i use 2N2219 of BF3553
  4. mettula

    Transistor BF 494

    i wish to ask again  :-[ :-[ :-[ i am not good in electronics  :-[ :-[ :-[ can i for the schematic  of veronica 1w pll pro use 2N2219 or 2N3553 or something equvalent instead of the BF494??? my local shop has nt  BF494 or BF 184 thanks a lot :-[ :-[ :-[ and can anyone suggest a page for...
  5. mettula

    caps

    the brand is labtec and has also written with 3D spatilizer 3Ds sound.as for version on the main board there is written labtec BG main REV 1.5. it uses a pait of tda2005 as amplifiers, also present there are 2 LM386, 2 TL074, LM13600 and PSZ740P :-[ :-[ :-[
  6. mettula

    caps

    what i really mean is how to know which capacitor is faulty if it is in a circuit. For example - I have an amplifier and it has its'left channel - no sound is coming out - the coupling cap is off and how to locate it. Also when no input signal the sub makes a 100Hz noise is it the decoupling...
  7. mettula

    caps

    i wish to ask, exactly how do you verify if a capacitor is good or opend/clesed by means of digital multimeter thanks!!!! >:(
  8. mettula

    rf power amp

    hello all out there, i need a schematic to try and boost an rf power of 1 w to 3 or 4 watts for personal training on rf. Pleaser i need a circuit and/or schematics.!!n 10ks guys :)
  9. mettula

    74LS193 and CD74HCT193E

    thanks very much guys, i will try and maybe everything will melt........
  10. mettula

    7v5

    attached find the complete pcb diagram..the highlighted 2 diodes are 7v5, the others 1n4148 or 4001
  11. mettula

    7v5

    it is for an rf circuit. mostly it is used  as a voltage  limiter........
  12. mettula

    7v5

    anyone can plz suggest an alternative for the diode 7v5 - my local shop hasnt :-\
  13. mettula

    74LS193 and CD74HCT193E

    i wish to ask what is the difference between 74LS193 and CD74HCT193E - do i get the same result if one is not available in my local shoop. I think they are the same but different name due to diferent manufactur. Am i wrong ???PLZ advice ... 10ks
  14. mettula

    A vizz Appears on Telephone line when I connect the serial port!

    Use an audio isolation tranformer before entry in the serial port. it has to be of ratio 1:1 and 600:600 ohms. I found a good one at radio shack http://www.radioshack.com/product/index.jsp?cp=&productId=2103994&tab=summary
  15. mettula

    digital tranciever

    A suggestion; try using the formula t = rc (t=time constatnt, r = resistance in ohms, c = capacitance) I dont' know exactly on the topic and if anyone out there would correct me i'm grateful . LOL
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