manz
New Member
hello...
Im building a FM transmitter but it just doesn`t work well.ive been building about 4-5 diff types just to at least get the working one.ive got all the parts correctly but only for the inductance (which have to be hand made) and the elecret mic.
the problems:
1-1st circuit : can transmit but gone in just 1m.(the circuit should be about 100m)
2- 2nd circuit : nothing (no hawling sound and no voice)
3- 3rd circuit : got howling sound but no voice (claimed to be 200m-500m by pcs-electronics web)
questions:
1. since all the parts and connection been triple check i assumed it should be the coil for the inductance.what are the diff between the AWG and SWG copper magnet wire should be used to wind as the inductance.i couldn`t get the AWG wire but just the SWG. is it the AWG for the US and SWG for asia? (im in asia)
2. is that copper wire that should be use is the same as in the dc motor winding? can i just use the normal single core wire as the inductance? will that affact the circuit?
3.how to actually solder the copper wire to the vero_board since i found it couldn`t be soldered (im using the SWG). can it be replace with the fix one stated 1uH or anything similar the the value of henry given by the coil by using the henry equation.how does the diameter of the copper wire affect the henry value since i found no diameter needed in the henry equation.
4. how to actually wind the copper wire.should it be a gap between the loop.can i just subs the copper wire using the normal single core wire by stripping the insulator.
5.how does actually the electret mic looks like?is it a small one with a size of a button of a shirt diameter?how will the internal resistance of the electret mic affect the circuit .ive got a few of them but with diff internal resistance (by taping bot mic`s pin with the multimeter and check for resistance).
maybe some of the method i used to check the components was wrong and please anybody correct me.im no electrical nor electronics student but machanical.i really interested in electronics hobby and i`ve built quite a few in the pass but this is the 1st time regarding transmiter and wave.
i really need some help or comment/advice from u guys since ive been working on it for everyday for a week till now.
really appeciate it.thanks.
Im building a FM transmitter but it just doesn`t work well.ive been building about 4-5 diff types just to at least get the working one.ive got all the parts correctly but only for the inductance (which have to be hand made) and the elecret mic.
the problems:
1-1st circuit : can transmit but gone in just 1m.(the circuit should be about 100m)
2- 2nd circuit : nothing (no hawling sound and no voice)
3- 3rd circuit : got howling sound but no voice (claimed to be 200m-500m by pcs-electronics web)
questions:
1. since all the parts and connection been triple check i assumed it should be the coil for the inductance.what are the diff between the AWG and SWG copper magnet wire should be used to wind as the inductance.i couldn`t get the AWG wire but just the SWG. is it the AWG for the US and SWG for asia? (im in asia)
2. is that copper wire that should be use is the same as in the dc motor winding? can i just use the normal single core wire as the inductance? will that affact the circuit?
3.how to actually solder the copper wire to the vero_board since i found it couldn`t be soldered (im using the SWG). can it be replace with the fix one stated 1uH or anything similar the the value of henry given by the coil by using the henry equation.how does the diameter of the copper wire affect the henry value since i found no diameter needed in the henry equation.
4. how to actually wind the copper wire.should it be a gap between the loop.can i just subs the copper wire using the normal single core wire by stripping the insulator.
5.how does actually the electret mic looks like?is it a small one with a size of a button of a shirt diameter?how will the internal resistance of the electret mic affect the circuit .ive got a few of them but with diff internal resistance (by taping bot mic`s pin with the multimeter and check for resistance).
maybe some of the method i used to check the components was wrong and please anybody correct me.im no electrical nor electronics student but machanical.i really interested in electronics hobby and i`ve built quite a few in the pass but this is the 1st time regarding transmiter and wave.
i really need some help or comment/advice from u guys since ive been working on it for everyday for a week till now.
really appeciate it.thanks.