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  1. mettula

    Unbalanced to blanced

    ok thanksa audio guru - but another questions; 1) which you think is of best quality, a balun transformer or an opamp? 2) about the opamp which you think is best? tl 071?? thanks
  2. mettula

    Unbalanced to blanced

    Audioguru,  can you post me a circuit or help me visualize a circuit of the balancing op-amp please. Is it putting the input through an inverting opamp of 0 gain, and than putting the output to pin 3 of the xlr?
  3. mettula

    Unbalanced to blanced

    audio frequencies 20hz to 20khz
  4. mettula

    Unbalanced to blanced

    Hi all, sry for asking again, but can anyone tell me how can I convert an unbalanced signal to balanced signal. Do I need a BALUN transformer? or just a centre tapped transformer?? can anyone also suggest a brand of such items??? Thanks very much matthew
  5. mettula

    opamps

    thanks audioguru. I'll try it; maybe it'll melt down knowing my luck!! lol but very thanks for evrything I appreciate your patience and help Mettula
  6. mettula

    opamps

    if I do something like in the picture; will it work?? - any suggestions for the IC's?? will 741 work? I prefer somthing of very good quality - so any ideas. Many thanks
  7. mettula

    opamps

    Audioguru, I don not know about adding or subtracting matrices; where can I learn, any ideas of any IC's which I can use??? Thanks
  8. mettula

    opamps

    ok audio guru, here is it. thanks
  9. mettula

    opamps

    Thanks AudioGuru; but what about that schematic of the opamp with 2 +ives as the inputs - what do those mean thanks
  10. mettula

    opamps

    Hello everybody I have a difficulty. On the attahced .jpg file one can see 2 symbols of an opamp. But one opamp has 2+ instead of 1+ and 1-. Does this means that the oparational amplifier is used as not as an non inverting amplifier.?? Also how can I make it without any gain?? Also when I have...
  11. mettula

    digital

    can anyone recommend a book which has some digital boolean algebra or karnaugh maps and worked examples of these thanks
  12. mettula

    5 second delay System

    Hello, I suggest that for the 5 Sec dalay you can purcahse a processor specifally made for audio delay - they are nice 1U boxes and not quite expensive considering that they can run a couple of effects (gating, compression etc). Can I suggest names of companies in this forum ?? if you want...
  13. mettula

    5 second delay System

    Hello, I suggest that for the 5 Sec dalay you can purcahse a processor specifally made for audio delay - they are nice 1U boxes and not quite expensive considering that they can run a couple of effects (gating, compression etc). Can I suggest names of companies in this forum ?? if you want...
  14. mettula

    synthesiser

    hi guys I am in need of the circuit diagram of NX2000 technics synthesiser. I need it because I have tha mentioned synth but it is not working ( no sound comes out - but the amps work :'() Anyone with an idea of what can I do?? Thanks for the great help as usual :)
  15. mettula

    4 Watt FM Transmitter

    u can make the veronica - it has a preemphasis network and a pll so it is very stable fm exiter, it only needs an rf power amp if there is any volnteer.....;) veronica_1w_pll_pro_transmitter.rar
  16. mettula

    rf power amp

    for fm band - 88 - 108 MHz - i do not wish to use a BLY90 / 86 or similar as these amplify a lot - I'd tought I'd go for 2SC1971 - what do you think?
  17. mettula

    rf power amp

    have you got a schematic plz for me - thanks...
  18. mettula

    Transistor BF 494

    audioguru the varicap i found it - i am uploading the full schematic and files of the veronica including pcb, parts list  instructions etc - more power to this comunity lol maybe u wanna use it somewhere else veronica_1w_pll_pro_transmitter.rar
  19. mettula

    Transistor BF 494

    lol audioguru i finally collected all the parts - and yeah it would have been much easier if i would have bought it  :P :P
  20. mettula

    Transistor BF 494

    they were around LM2.50 which makes approx 1-1.5 euwos for 5 transistors and acouple of heatsinks....
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