Recent content by ben111

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    circuits

    HI everyone.   i  finished building the amplifier but it still did not work. i checked and checked for any errors but  i corrected the ones i found and did not fine any again , but it did not even work poorly.the signal became worse.   i thought of an op-amp. is there one that i could use that...
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    circuits

    hi. i bought a new soldering wire and it is so so good.it solders very well it acyually has much flux in its core.   please MP(or anyone) can you go back to the project(RF circuits:then Tv Signal Amplifier) and read the last chapter  and please tell me what a feed through capacitor is and how i...
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    circuits

    thanks for your help. i hope that if i find the flux it will make the soldering easier. i also hope it is not expensive.
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    please help me .

    i do not know. i am just writing so you do not feel abandoned. i can advice you to edit your post and write your request in clear ,good english. -ben
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    circuits

    thanks. i will put it in a box.   since i did not have a pcb, i bought a plaque a essai as it is called in french.it has many long strips of copper on it with many holes along  the length of each path. i tried soldering some components to the board but it was so so so so difficult to do that i...
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    circuits

    do you think i really need to solder the components together? what about the earthing? i took the point earth as the negative terminnal  of the battery as they are  on the same wire. you can look at the circuit in the RF projects , there you will see tv signal amplifier. thanks for your help.
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    circuits

    I think i did the connections very well.i mounted the circuit on a cartboard paper but i did not earth the circuit.though i did not solder the transistor to the wires i wrapped the wires around the leads of the transistors very firmly  so it is imposible that there is an open circuit.
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    circuits

    can the connecting of small capacitance capacitors not instead help? what if the circuit is so big that the connecting wires cannot  give rise to any capacitance between them?
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    PCB needed

    Hi everyone. I need a pcb of about 5by5cm for a single transformer amplifier.i tried to get most of the parts but i have not got the pcb and i badly need it  for the circuit to function properly as it is a tv signal amplifier. if someone can make it for free and send it to me by post i will be...
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    circuits

    is there only one type of series rectifier diode? most part sellers here are very dull.all they want is tha name and number of a part.can you give that to me so i can try to find?   thanks for the spelling.
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    circuits

    thanks.  i know about the stay capacitance but i want to know how they come about due to the large circuits.   i did potential dividers in high school.lets say i want to reduce the voltage to the sholder by half, do i have to connect two resistors in parallel,then connect the shoulder across...
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    circuits

    hi. i just want to know what causes a circuit not to work if it is build bigger than the size stated in the circuit diagram.i just buid a tv signal amplifier  but when i used it on my tv, the signal was even worst.it was about trice the original size.   i build it on a cartboard paper as i did...
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    labels on electronics

    example:i saw what looked like a transistor but it had 2 lead.it had labels on it.it was very protected.what can i do to discover what it is?
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    labels on electronics

    hello. when i open old devices to try to understand how they work, i see many components  i do not know what there are.but they have labels on them ie numbers and letters.is there i site that you can just write the labels of the part and you get full details about the part? thanks. -bennett-
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    Need a PCB please

    hello. i saw a project hear that really interested me (tv signal amplifier) i got all the parts that i need and constructed the circuit.i did the right connections but the tv signals was even more blured when i tried it.then i iwas told i had to respect the dimemsions of the circuit given in the...
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