mettula

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

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

ok audio guru, here is it. thanks

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

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 to build this circuit, those amplifiers have to have no gain. so for the normal non inverting opamps, I do not do the feedback resistors?? ??? ??? ??? Thanks for your help and patience

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

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??.. mettula

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??.. mettula

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 :)

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

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?

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

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

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

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

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 :) :)

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

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

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 transistor equivalent plzzzzzzz

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 :-[ :-[ :-[

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 cap?if yes how to locate it thanks for your patience

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

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 :)

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

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